Today's Message Index:
----------------------
1. 01:48 AM - Air-Data Computer (richard soennichsen)
2. 06:52 AM - Re: Free speed (Scott Bilinski)
3. 07:05 AM - Re: Fw: Garmin GPS 35/AnywhereMap feeding a NavAid (Sam Buchanan)
4. 07:13 AM - Re: Odyssey Battery (best source these days) (Rob Miller)
5. 07:29 AM - Chicago Pneumatic CP-214 Squeezer FOR SALE (Rob Miller)
6. 07:32 AM - Re: Cedar Key, Fl (Ollie Washburn)
7. 07:48 AM - CP 214 Squeezer on Ebay (Bill Dube)
8. 07:53 AM - Re: Free speed (Dave Bristol)
9. 07:54 AM - What magnetic heading input? (David Carter)
10. 08:18 AM - Re: Air Box/cowl Interference? (Pat Perry)
11. 08:38 AM - Fw: What magnetic heading input? (David Carter)
12. 09:00 AM - Re: Odyssey Battery (best source these days) (James E. Clark)
13. 09:03 AM - Re: Fw: Garmin GPS 35/AnywhereMap feeding a NavAid (Mark Phillips)
14. 09:12 AM - Re: Free speed (LeastDrag93066@aol.com)
15. 09:40 AM - Re: Free speed (HCRV6@aol.com)
16. 09:42 AM - Re: Free speed (Scott Bilinski)
17. 10:01 AM - Re: Free speed (Kysh)
18. 10:06 AM - Re: Fw: Garmin GPS 35/AnywhereMap feeding a NavAid (Sam Buchanan)
19. 10:11 AM - Re: Raise your hand! (Dave von Linsowe)
20. 10:59 AM - Re: Raise your hand! (lucky macy)
21. 11:16 AM - Re: Raise your hand! (lucky macy)
22. 11:16 AM - Re: Free speed (Jim Norman)
23. 11:33 AM - Flap Hinge Pin Safety (Ken Brooks)
24. 11:36 AM - RV8 canopy slider parts for RV3 (Rick Fogerson)
25. 12:26 PM - Re: Free speed (Dr. Leathers)
26. 02:13 PM - Re: Fw: Garmin GPS 35/AnywhereMap feeding a NavAid (Mark Phillips)
27. 02:20 PM - Re: Free speed (Garry LeGare)
28. 03:19 PM - RV3 Canopy (Ron Rosenberg)
29. 03:46 PM - Re: Free speed (van Bladeren, Ron)
30. 03:55 PM - Re: Odyssey Battery (best source these days) (Bill Dube)
31. 03:55 PM - Re: Free speed (Jim Oke)
32. 04:07 PM - Re: RV3 Canopy (Jim Oke)
33. 04:12 PM - Re: Free speed (Bill Dube)
34. 04:28 PM - Re: Free speed (Bill Marvel)
35. 04:41 PM - Re: Free speed (Gert)
36. 04:44 PM - Flap template? (Larry Bowen)
37. 05:07 PM - Re: Cedar Key, Fl (John Huft)
38. 05:15 PM - Re: Fw: Garmin GPS 35/AnywhereMap feeding a NavAid (Sam Buchanan)
39. 05:31 PM - Re: Air-Data Computer (Jerry Springer)
40. 05:58 PM - Re: Free speed (Jerry Springer)
41. 06:48 PM - Prop Tape (RGray67968@aol.com)
42. 07:02 PM - Re: Prop Tape (Charles Rowbotham)
43. 07:50 PM - Dynon developments- EFIS-D10 (Jim Jewell)
44. 08:06 PM - Re: Free speed (LeastDrag93066@aol.com)
45. 08:24 PM - Re: Dynon developments- EFIS-D10 (Noel & Yoshie Simmons)
46. 08:44 PM - Re: Free speed (Jim Oke)
47. 08:52 PM - Re: Dynon developments- EFIS-D10 (Larry Bowen)
Message 1
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| Subject: | Air-Data Computer |
--> RV-List message posted by: richard soennichsen <richas@yahoo.com>
Hey all,
A buddy turned me onto this (the creators presented at the local EAA meeting),
a Hell of a value in flight computers. Check it out:
www.fdatasystems.com
Richard
Message 2
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--> RV-List message posted by: Scott Bilinski <bilinski@kyocera-wireless.com>
How about a picture or a little more verbal detail?
At 07:30 PM 3/2/03 -0800, you wrote:
>--> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
>
>I wish to share something with all RVers. I discovered this by accident. If
>you put a reverse scoop on the belly of your plane towards the back you will
>likely pickup about 5mph. I did this because I thought that the cockpit had
>to much positive pressure and couldn't get out. I was partially right. When
>you let the air out of the back the sliding canopy does not go our as far
>and the speed increases. Try it it will only cost you a little time.
>
>rsalnutt@inreach.com
>
>
Scott Bilinski
Eng dept 305
Phone (858) 657-2536
Pager (858) 502-5190
Message 3
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| Subject: | Re: Garmin GPS 35/AnywhereMap feeding a NavAid |
--> RV-List message posted by: Sam Buchanan <sbuc@hiwaay.net>
Jeff Point wrote:
>
> --> RV-List message posted by: Jeff Point <jpoint@mindspring.com>
>
> Sam,
>
> If I read you correctly, when you switched from the Sentinal flash card
> GPS to the GPS35, you wired the Lowrance back into the Naviad and use
> the GPS35 to drive the Ipaq only. In all your experimenting, did you
> ever have a setup where the Navaid was driven by the anywhere map, which
> was getting signal from the GPS35? If so how did it work?
>
> Jeff Point
> RV-6 finish kit
> Milwaukee WI
>
Jeff, you are correct. Even though I have not driven the Navaid with the
iPAQ/GPS35 combination, I have no reason to think it will not work
superbly. As I understand the process, the tracking info is generated by
the AnywhwereMap software so the source of the raw GPS data to the iPAQ
should be inconsequential as long as it is solid data.
The GPS35 is a fine receiver and has operated flawlessly in my
installation. There were some tracking issues with earlier versions of
AnywhereMap, but according to Jim Ham (Mr. Smart Coupler) the data
stream from the newer versions contains all info to drive the Smart
Coupler with full functionality.
The biggest issue I see with the GPS35/iPAQ/ Navaid scenario is figuring
out the cable interfaces. There are quite a few possible combinations
depending on which iPAQ is being used and whether or not the Control
Vision interface box is used. Now, some pilots are beginning to
incorporate Blue Tooth, and this throws another kink into the bundle.
:-)
But.......there should be a way to hook up any system (except the Dell
PDA which has no serial port......unless you figure out some way to
export NMEA via an expansion slot) if you do your homework.
Sam Buchanan
Message 4
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| Subject: | Re: Odyssey Battery (best source these days) |
--> RV-List message posted by: Rob Miller <rmill2000@yahoo.com>
Your analysis makes sense, Dan.
I recently switched from the Concord to a 20 AH Panasonic (22.5 pounds vs.
14) purchased from Digikey. The Panasonic will NOT crank the engine as
vigorously as the Concord and the aircraft is hard pressed to start on a
cold day. I will either need switch to the Odyssey and/or install
electronic ignition in order to improve starting performance.
Rob Miller
-8 N262RM "Bad Cat"
--- Dan Checkoway <dan@rvproject.com> wrote:
> --> RV-List message posted by: "Dan Checkoway" <dan@rvproject.com>
>
> I figured I'd pass this info on to the lists...I just ordered my Odyssey
> PC680 battery online from Sunn Battery Co. Originally I was going to
> order
> it from Batteries4Everything.com, which had it slightly cheaper, but
> here's
> the deal:
>
> I shopped around for cheaper alternatives to the PC680, such as the
> P174-ND
> and P231-ND (both Panasonic) from Digi-Key. The problem I had with
> those
> two models, while they are MUCH cheaper and possibly a few ounces
> lighter
> than the Odyssey, is that they have higher internal resistance (12 and
> 11
> milliohms respectively, compared to the Odyssey's 7 milliohms)...and
> they
> also have a very slightly different form factor. I didn't want to screw
> around with that. For $30 more I'll have the peace of mind that I'm
> using
> what Van's uses (I know that's a somewhat passive approach, but oh
> well).
>
> Buying from Sunn Battery there's no sales tax since they're in Florida
> (I'm
> in CA), they don't charge any handling fees (that I could see), and
> shipping
> is FIXED at $5.50 for Priority Mail. It worked out to $80.09
> door-to-door.
>
> Batteries4Everything, while having a $12 cheaper price, is in CA...so
> there
> would be sales tax. Plus they tack on a handling fee. Then, having to
> ship
> 15 pounds via UPS (possibly hazmat?), would probably end up being more
> expensive in the end.
>
> Hope this helps if you're still looking to buy the PC680.
>
> )_( Dan
> RV-7 N714D (finish)
> http://www.rvproject.com
>
> ----- Original Message -----
> From: <sunnbattery@hotmail.com>
> To: <dan@rvproject.com>
> Subject: Thank you for your order - #4779
>
>
> > Dear Dan Checkoway,
> >
> > Thank You for your order. We'll begin processing immediately. It
> > should ship out within 2-3 business days at the latest. If you have
> > any questions please email us at sunnbattery@hotmail.com We
> > appreciate your business.
> > Order no. 4779
> >
> > Item Description Qty Unit Price Total Price
> > Odyssey PC680 1 $74.59 $74.59
> > Battery
> > Subtotal $74.59
> > Shipping $5.50
> > Tax $0.00
> > Total $80.09
> > Total amount reserved on your credit card: $80.09
> >
> > Your card will not be charged until the order has been shipped (if
> > applicable). When the order ships, or if your order is canceled,
> > we'll send you another email.
> >
> > If you have any questions about your
> > order, please reply to this email.
> >
> >
> > Shipping address:
> > ...
> >
> > USPS Priority Mail
>
>
>
>
>
>
http://taxes.yahoo.com/
Message 5
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| Subject: | Chicago Pneumatic CP-214 Squeezer FOR SALE |
--> RV-List message posted by: Rob Miller <rmill2000@yahoo.com>
Ok guys, here it is:
For Sale: The real deal, not some imitation, well used but great
functioning CP-214 pneumatic squeezer. Unit comes with a 1" yoke. Much
more powerful than the import knock-offs. Will squeeze 1/8th or larger
rivets with little or no sensitivity as to die position--no fooling with
washers to get the appropriate leverage--it simply squeezes the rivet.
$350/BO. Selling because my plane is finished and I don't plan on
building another.
Please reply off-list rmill2000@yahoo.com
Do not archive
Rob Miller
-8 N262RM "Bad Cat" 47 hours
http://taxes.yahoo.com/
Message 6
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|
| Subject: | Re: Cedar Key, Fl |
--> RV-List message posted by: "Ollie Washburn" <skybolt-aviator@msn.com>
I have only been to Cedar Key a couple of times even though i only live about 20mins.away
in RV so don't know about accommodations except they have several resturants.HOWEVER
the taxi ride to town is $5 PER person and $5 PER person back
to airport.
Ollie 6A Central Fl.
----- Original Message -----
From: Lenleg@aol.com
Subject: RV-List: Cedar Key, Fl
--> RV-List message posted by: Lenleg@aol.com
We have several RVs making a trip to the Keys in May with a night over in
Cedar Key ... has been a while since I stayed there ... do any of you Florida
guys have suggestions for hotels, bed & breakfast, restaurants?
Thanks !!
Len Leggette RV-8A
N901LL
Greensboro, N.C.
57 hours !!
Message 7
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| Subject: | CP 214 Squeezer on Ebay |
--> RV-List message posted by: Bill Dube <bdube@boulder.nist.gov>
There is a very good deal on a Chicago Pneumatic model 214 rivet squeezer
on Ebay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=31482&item=2512694849&rd=1
Item #2512694849 $76 at the moment.
Message 8
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--> RV-List message posted by: Dave Bristol <bj034@lafn.org>
Russ,
I don't think that increasing airflow through the fuselage is going to increase
airspeed. However if you have a leak in your static system, lowering the pressure
in the fuselage will increase the indicated airspeed.
Dave RV6 So.Cal
EAA Technical Counselor
Russ Alnutt wrote:
> --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
>
> I wish to share something with all RVers. I discovered this by accident. If you
put a reverse scoop on the belly of your plane towards the back you will likely
pickup about 5mph. I did this because I thought that the cockpit had to much
positive pressure and couldn't get out. I was partially right. When you let
the air out of the back the sliding canopy does not go our as far and the speed
increases. Try it it will only cost you a little time.
>
> rsalnutt@inreach.com
>
Message 9
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|
\"aeroelectric-list\"" <aeroelectric-list@matronics.com>
| Subject: | What magnetic heading input? |
--> RV-List message posted by: "David Carter" <dcarter@datarecall.net>
Just visited your web site ( http://www.fdatasystems.com/contact_information.htm
). Noticed the "winds" calculation feature. Didn't see a "magnetic heading"
input to the box, which is a "traditional" requirement to calculate winds.
Do you calculate wind differently, having enough other data, using ground track
and ground speed from GPS and TAS to calculate backwards to get "wind speed
and direction"?
If you can do this then you should also be able to calculate "mag heading" and
display it. Would be a nice poor man's stabilized mag compass - airborne only
- (based on GPS & ADC TAS info).
- Stabilized mag compass systems are quite expensive - this "solid state"
"back door calculated value" method would be a real financial boon to the homebuilt
aircraft market.
- When you package it in a round case, you could provide an analog type display
of a "gyro compass", in addition to the other items you already plan to
display. That way, I could select the "round dial stabilized mag compass" page
and put the instrument right below my attitude indicator to use as my "gyro
compass" in the instrument cross check.
David Carter
409-722-7259
Message 10
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| Subject: | Re: Air Box/cowl Interference? |
--> RV-List message posted by: "Pat Perry" <pperryrv@hotmail.com>
Mine has it on the lower right, I'm going to shift the box left 1/4" by
slotting the holes.
Pat Perry
Dallas, PA
RV-4 N154PK Flies great!
>From: Rob Miller <rmill2000@yahoo.com>
>Reply-To: rv-list@matronics.com
>To: rv-list@matronics.com
>Subject: Re: RV-List: Air Box/cowl Interference?
>Date: Wed, 26 Feb 2003 12:25:01 -0800 (PST)
>
>--> RV-List message posted by: Rob Miller <rmill2000@yahoo.com>
>
>Scott
>
>My airbox and cowl make very slight contact on the left side with my
> -A1A. I've shaved off a couple of rivets on the airbox and have been
>monitoring the situation and watching for wear. I'm sure this is
>relatively common, I can't believe that "they've never heard of it."
>
>Rob Miller
>-8 N262RM "Bad Cat" 47 hours
>
>
>--- Scott Bilinski <bilinski@kyocera-wireless.com> wrote:
> > --> RV-List message posted by: Scott Bilinski
> > <bilinski@kyocera-wireless.com>
> >
> > I have a IO-360-C1A engine. It has a Superior Air Parts Sump which is
> > the same
> > externally as the A1A. The problem is with my filtered airbox. It hits
> > the side
> > of the cowl, so I remade the plate and moved the air intake hole over an
> > inch
> > and everything is fine now. Is anyone else having this problem? I talked
> > with
> > Vans and they have never heard of it. I have the Air Flow Performance
> > injection
> > kit for a RV-8 and they have has never heard of it, Bart at AeroSport
> > Power has
> > heard of this a few times. So what gives? Where is the problem? No one
> > seems to
> > know.
> >
> >
> > Scott Bilinski
> > Eng dept 305
> > Phone (858) 657-2536
> > Pager (858) 502-5190
> >
> >
> >
> >
> >
> >
>
>
>http://taxes.yahoo.com/
>
>
Message 11
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"aeroelectric-list" <aeroelectric-list@matronics.com>
| Subject: | Fw: What magnetic heading input? |
--> RV-List message posted by: "David Carter" <dcarter@datarecall.net>
For RV-list and Aeroelectric, here's the response re "magnetic heading" and
"wind" - reply is from the ADC vendor
David
----- Original Message -----
From: "Charles Newman" <support@fdatasystems.com>
Subject: Re: What magnetic heading input?
> David,
>
> Thanks for your question.
>
> There are three values the user must input to our
> unit. Heading, Barometric Pressure and Fuel added to
> tanks. When the "wind" page is selected on the
> AFP-30, the heading will initially show the GPS track.
> The user must then adjust it a few degrees to agree
> with his magnetic compass or DG to get an accurate
> winds aloft reading.
>
> I wish we could find the heading via a "back door"
> method, but it is not mathematically possible. We are
> searching for an economical magnetic heading sensor to
> feed realtime heading to our computer and perhaps a
> stand alone indicator as you suggested. For now it
> will require a small turn of the knob.
>
>
> Thanks for your interest,
>
> Charles Newman
> 831-662-9502
>
>
> --- David Carter <dcarter@datarecall.net> wrote:
> > Just visited your web site (
> > http://www.fdatasystems.com/contact_information.htm
> > ). Noticed the "winds" calculation feature. Didn't
> > see a "magnetic heading" input to the box, which is
> > a "traditional" requirement to calculate winds. Do
> > you calculate wind differently, having enough other
> > data, using ground track and ground speed from GPS
> > and TAS to calculate backwards to get "wind speed
> > and direction"?
> >
> > If you can do this then you should also be able to
> > calculate "mag heading" and display it. Would be a
> > nice poor man's stabilized mag compass - airborne
> > only - (based on GPS & ADC TAS info).
> > - Stabilized mag compass systems are quite
> > expensive - this "solid state" "back door calculated
> > value" method would be a real financial boon to the
> > homebuilt aircraft market.
> > - When you package it in a round case, you
> > could provide an analog type display of a "gyro
> > compass", in addition to the other items you already
> > plan to display. That way, I could select the
> > "round dial stabilized mag compass" page and put the
> > instrument right below my attitude indicator to use
> > as my "gyro compass" in the instrument cross check.
> >
> > David Carter
> > 409-722-7259
> >
>
>
> =====
>
>
Message 12
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| Subject: | Odyssey Battery (best source these days) |
--> RV-List message posted by: "James E. Clark" <jclark@conterra.com>
Go with the Odessey first.
If the Panasonic won't turn it over a full turn then the EI is not going to
get you there.
The battery route is about 1/10 the EI route.
You will *probably* add EI later for other reasons though. :-)
James
... been "there" (EI + Panasonic + cold day = "jump start")
... Odessey now installed on O-320 with "old style" starter
> -----Original Message-----
> From: owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com]On Behalf Of Rob Miller
> Sent: Monday, March 03, 2003 10:13 AM
> To: rv-list@matronics.com
> Subject: Re: RV-List: Odyssey Battery (best source these days)
>
>
> --> RV-List message posted by: Rob Miller <rmill2000@yahoo.com>
>
> Your analysis makes sense, Dan.
>
> I recently switched from the Concord to a 20 AH Panasonic (22.5 pounds vs.
> 14) purchased from Digikey. The Panasonic will NOT crank the engine as
> vigorously as the Concord and the aircraft is hard pressed to start on a
> cold day. I will either need switch to the Odyssey and/or install
> electronic ignition in order to improve starting performance.
>
> Rob Miller
> -8 N262RM "Bad Cat"
>
>
> --- Dan Checkoway <dan@rvproject.com> wrote:
> > --> RV-List message posted by: "Dan Checkoway" <dan@rvproject.com>
> >
> > I figured I'd pass this info on to the lists...I just ordered my Odyssey
> > PC680 battery online from Sunn Battery Co. Originally I was going to
> > order
> > it from Batteries4Everything.com, which had it slightly cheaper, but
> > here's
> > the deal:
> >
> > I shopped around for cheaper alternatives to the PC680, such as the
> > P174-ND
> > and P231-ND (both Panasonic) from Digi-Key. The problem I had with
> > those
> > two models, while they are MUCH cheaper and possibly a few ounces
> > lighter
> > than the Odyssey, is that they have higher internal resistance (12 and
> > 11
> > milliohms respectively, compared to the Odyssey's 7 milliohms)...and
> > they
> > also have a very slightly different form factor. I didn't want to screw
> > around with that. For $30 more I'll have the peace of mind that I'm
> > using
> > what Van's uses (I know that's a somewhat passive approach, but oh
> > well).
> >
> > Buying from Sunn Battery there's no sales tax since they're in Florida
> > (I'm
> > in CA), they don't charge any handling fees (that I could see), and
> > shipping
> > is FIXED at $5.50 for Priority Mail. It worked out to $80.09
> > door-to-door.
> >
> > Batteries4Everything, while having a $12 cheaper price, is in CA...so
> > there
> > would be sales tax. Plus they tack on a handling fee. Then, having to
> > ship
> > 15 pounds via UPS (possibly hazmat?), would probably end up being more
> > expensive in the end.
> >
> > Hope this helps if you're still looking to buy the PC680.
> >
> > )_( Dan
> > RV-7 N714D (finish)
> > http://www.rvproject.com
> >
> > ----- Original Message -----
> > From: <sunnbattery@hotmail.com>
> > To: <dan@rvproject.com>
> > Subject: Thank you for your order - #4779
> >
> >
> > > Dear Dan Checkoway,
> > >
> > > Thank You for your order. We'll begin processing immediately. It
> > > should ship out within 2-3 business days at the latest. If you have
> > > any questions please email us at sunnbattery@hotmail.com We
> > > appreciate your business.
> > > Order no. 4779
> > >
> > > Item Description Qty Unit Price Total Price
> > > Odyssey PC680 1 $74.59 $74.59
> > > Battery
> > > Subtotal $74.59
> > > Shipping $5.50
> > > Tax $0.00
> > > Total $80.09
> > > Total amount reserved on your credit card: $80.09
> > >
> > > Your card will not be charged until the order has been shipped (if
> > > applicable). When the order ships, or if your order is canceled,
> > > we'll send you another email.
> > >
> > > If you have any questions about your
> > > order, please reply to this email.
> > >
> > >
> > > Shipping address:
> > > ...
> > >
> > > USPS Priority Mail
> >
> >
> >
> >
> >
> >
>
>
> http://taxes.yahoo.com/
>
>
Message 13
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| Subject: | Re: Garmin GPS 35/AnywhereMap feeding a NavAid |
--> RV-List message posted by: Mark Phillips <ripsteel@edge.net>
Hi Sam!
The Dell Axim is now available with serial cable- Craig at PCFlightSystems is
currently building one of their ADAHARS systems with GPS moving map to feed
two Axims. Won't have any air experience for a while yet, 8-( but it
will be test-flown in my truck soon 8-) for some basic evaluation and
familiarization!
http://www.pcflightsystems.com/pcefis.html
From The PossumWorks in TN
Mark
>
> But.......there should be a way to hook up any system (except the Dell
> PDA which has no serial port......unless you figure out some way to
> export NMEA via an expansion slot) if you do your homework.
>
> Sam Buchanan
Message 14
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--> RV-List message posted by: LeastDrag93066@aol.com
Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
increase by mechanically clamping the back of the canopy down to the
fuselage. (Early issue of the RVator)
What I read Russ suggesting is an aerodynamic clamp.
By providing an aerodynamically active outlet for the air pressure under the
canopy, it eliminates the slight positive pressure under the canopy (relative
to the Bernoulli's pulling the canopy up) and keeps the canopy against the
fuselage.
Jim Ayers
RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
bj034@lafn.org writes:
> Russ,
>
> I don't think that increasing airflow through the fuselage is going to
> increase airspeed. However if you have a leak in your static system,
> lowering the pressure in the fuselage will increase the indicated airspeed.
>
> Dave RV6 So.Cal
> EAA Technical Counselor
>
>
> Russ Alnutt wrote:
>
> > --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
> >
> > I wish to share something with all RVers. I discovered this by accident.
> If you put a reverse scoop on the belly of your plane towards the back you
> will likely pickup about 5mph. I did this because I thought that the
> cockpit had to much positive pressure and couldn't get out. I was partially
> right. When you let the air out of the back the sliding canopy does not go
> our as far and the speed increases. Try it it will only cost you a little
> time.
> >
> > rsalnutt@inreach.com
> >
>
Message 15
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--> RV-List message posted by: HCRV6@aol.com
In a message dated 3/2/03 7:43:21 PM Pacific Standard Time,
rsalnutt@inreach.com writes:
<< I wish to share something with all RVers. I discovered this by accident.
If you put a reverse scoop on the belly of your plane towards the back you
will likely pickup about 5mph. >>
How about a little more information, like where exactly and what size scoop.
Was this a NASA type air scoop? It seems to me that these details could be
very relevant to the performance gain you are seeing. Thanks.
Harry Crosby
Pleasanton, California
RV-6, firewall forward
Message 16
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--> RV-List message posted by: Scott Bilinski <bilinski@kyocera-wireless.com>
So what I am hearing is, place a NACA scoop on the inside belly of the
plane facing backwards so it pulls air out. Is this correct?
At 12:10 PM 3/3/03 -0500, you wrote:
>--> RV-List message posted by: LeastDrag93066@aol.com
>
>Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
>increase by mechanically clamping the back of the canopy down to the
>fuselage. (Early issue of the RVator)
>What I read Russ suggesting is an aerodynamic clamp.
>By providing an aerodynamically active outlet for the air pressure under the
>canopy, it eliminates the slight positive pressure under the canopy (relative
>to the Bernoulli's pulling the canopy up) and keeps the canopy against the
>fuselage.
>
>Jim Ayers
>RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
>
>In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
>bj034@lafn.org writes:
>
>> Russ,
>>
>> I don't think that increasing airflow through the fuselage is going to
>> increase airspeed. However if you have a leak in your static system,
>> lowering the pressure in the fuselage will increase the indicated airspeed.
>>
>> Dave RV6 So.Cal
>> EAA Technical Counselor
>>
>>
>> Russ Alnutt wrote:
>>
>> > --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
>> >
>> > I wish to share something with all RVers. I discovered this by accident.
>> If you put a reverse scoop on the belly of your plane towards the back you
>> will likely pickup about 5mph. I did this because I thought that the
>> cockpit had to much positive pressure and couldn't get out. I was partially
>> right. When you let the air out of the back the sliding canopy does not go
>> our as far and the speed increases. Try it it will only cost you a little
>> time.
>> >
>> > rsalnutt@inreach.com
>> >
>>
>
>
Scott Bilinski
Eng dept 305
Phone (858) 657-2536
Pager (858) 502-5190
Message 17
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--> RV-List message posted by: Kysh <vans-dragon@lapdragon.org>
As LeastDrag93066@aol.com was saying:
> --> RV-List message posted by: LeastDrag93066@aol.com
>
> Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
> increase by mechanically clamping the back of the canopy down to the
> fuselage. (Early issue of the RVator)
> What I read Russ suggesting is an aerodynamic clamp.
> By providing an aerodynamically active outlet for the air pressure under the
> canopy, it eliminates the slight positive pressure under the canopy (relative
> to the Bernoulli's pulling the canopy up) and keeps the canopy against the
> fuselage.
Silly me, I thought the whole thing was tongue-in-cheek. :<
-Kysh
do not archive
--
| 'Life begins at 120kias' - http://www.lapdragon.org/flying |
| CBR-F4 streetbike - http://www.lapdragon.org/cbr |
| 1968 Mustang fastback - http://www.lapdragon.org/mustang |
| Got 'nix? - http://www.infrastructure.org/ |
| KG6FOB - http://www.lapdragon.org/ham |
| Give blood: Play Hockey! http://www.unixdragon.com/ |
Message 18
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|
| Subject: | Re: Garmin GPS 35/AnywhereMap feeding a NavAid |
--> RV-List message posted by: Sam Buchanan <sbuc@hiwaay.net>
Mark Phillips wrote:
>
> --> RV-List message posted by: Mark Phillips <ripsteel@edge.net>
>
> Hi Sam!
>
> The Dell Axim is now available with serial cable- Craig at PCFlightSystems is
> currently building one of their ADAHARS systems with GPS moving map to feed
> two Axims. Won't have any air experience for a while yet, 8-( but it
> will be test-flown in my truck soon 8-) for some basic evaluation and
> familiarization!
>
> http://www.pcflightsystems.com/pcefis.html
>
> >From The PossumWorks in TN
> Mark
Well......ok......you have our curiosity aroused.......tell us more!
=8
O
Just what are you sending to the "two Axims"?
And, how does the serial cable work (what kind of connectors, etc)?
Sounds like things are getting interesting in the Skunkworks. :-)
Sam Buchanan
Message 19
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|
| Subject: | Re: Raise your hand! |
--> RV-List message posted by: "Dave von Linsowe" <davevon@tir.com>
I'm working on being there via cattle car...
Not having been to Sun-n-Fun before, are there any days better than others?
I definitely want to see the RV's in the Sun "100".
Dave
RV-6 N98AR
The need for (more) speed---> Waiting for new MT prop.
Message 20
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|
| Subject: | Re: Raise your hand! |
--> RV-List message posted by: "lucky macy" <luckymacy@hotmail.com>
In the past, if you go sun n fun's official web site they usually list by
day who the airshow performers are going to be and other flying and
non-flying events. So I usually booked my days by making sure I'd catch a
Tucker or Handley airshow. But the race stuff and time to climb is also
usually scheduled ahead of time.
lucky
>From: "Dave von Linsowe" <davevon@tir.com>
>Reply-To: rv-list@matronics.com
>To: <rv-list@matronics.com>
>Subject: Re: RV-List: Raise your hand!
>Date: Mon, 3 Mar 2003 13:17:54 -0500
>
>--> RV-List message posted by: "Dave von Linsowe" <davevon@tir.com>
>
>I'm working on being there via cattle car...
>
>Not having been to Sun-n-Fun before, are there any days better than others?
>I definitely want to see the RV's in the Sun "100".
>
>Dave
>RV-6 N98AR
>The need for (more) speed---> Waiting for new MT prop.
>
>
Message 21
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|
| Subject: | Re: Raise your hand! |
--> RV-List message posted by: "lucky macy" <luckymacy@hotmail.com>
http://www.sun-n-fun.org/content/events/archive.asp?section=yearround&body=event
copy this in as one line
lucky
>From: "Dave von Linsowe" <davevon@tir.com>
>Reply-To: rv-list@matronics.com
>To: <rv-list@matronics.com>
>Subject: Re: RV-List: Raise your hand!
>Date: Mon, 3 Mar 2003 13:17:54 -0500
>
>--> RV-List message posted by: "Dave von Linsowe" <davevon@tir.com>
>
>I'm working on being there via cattle car...
>
>Not having been to Sun-n-Fun before, are there any days better than others?
>I definitely want to see the RV's in the Sun "100".
>
>Dave
>RV-6 N98AR
>The need for (more) speed---> Waiting for new MT prop.
>
>
Message 22
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--> RV-List message posted by: "Jim Norman" <jgnorman@tampabay.rr.com>
Careful everybody...
LOTS of physics, aerodynamics, etc, etc at play here. There is very little
free in life, and this may be the case here as well. Remember, the chance of
sucking exhaust fumes into the cabin may be as high as getting air OUT.
ALSO, as a physics major (back when Bernoulli was alive), I have to tell you
that it is impossible to equalize pressure inside and outside the cabin. The
differences in air speed (slow inside the plane and fast outside) dictates
that there will ALWAYS be a pressure difference.
So... "danger Will Robinson!"... go slow partner.
jim
Tampa
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com]On Behalf Of Scott Bilinski
Subject: Re: RV-List: Free speed
--> RV-List message posted by: Scott Bilinski
<bilinski@kyocera-wireless.com>
So what I am hearing is, place a NACA scoop on the inside belly of the
plane facing backwards so it pulls air out. Is this correct?
At 12:10 PM 3/3/03 -0500, you wrote:
>--> RV-List message posted by: LeastDrag93066@aol.com
>
>Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
>increase by mechanically clamping the back of the canopy down to the
>fuselage. (Early issue of the RVator)
>What I read Russ suggesting is an aerodynamic clamp.
>By providing an aerodynamically active outlet for the air pressure under
the
>canopy, it eliminates the slight positive pressure under the canopy
(relative
>to the Bernoulli's pulling the canopy up) and keeps the canopy against the
>fuselage.
>
>Jim Ayers
>RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
>
>In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
>bj034@lafn.org writes:
>
>> Russ,
>>
>> I don't think that increasing airflow through the fuselage is going to
>> increase airspeed. However if you have a leak in your static system,
>> lowering the pressure in the fuselage will increase the indicated
airspeed.
>>
>> Dave RV6 So.Cal
>> EAA Technical Counselor
>>
>>
>> Russ Alnutt wrote:
>>
>> > --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
>> >
>> > I wish to share something with all RVers. I discovered this by
accident.
>> If you put a reverse scoop on the belly of your plane towards the back
you
>> will likely pickup about 5mph. I did this because I thought that the
>> cockpit had to much positive pressure and couldn't get out. I was
partially
>> right. When you let the air out of the back the sliding canopy does not
go
>> our as far and the speed increases. Try it it will only cost you a little
>> time.
>> >
>> > rsalnutt@inreach.com
>> >
>>
>
>
Scott Bilinski
Eng dept 305
Phone (858) 657-2536
Pager (858) 502-5190
Message 23
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|
| Subject: | Flap Hinge Pin Safety |
--> RV-List message posted by: "Ken Brooks" <kenbrooks@charter.net>
Many thanks to all who responded with their hinge pin methods/ideas. I
love this list!
Don't know which I'll use, but I'm thinkin'. . .
Ken Brooks
Roscoe, IL
Do Not Archive
Message 24
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|
| Subject: | RV8 canopy slider parts for RV3 |
--> RV-List message posted by: "Rick Fogerson" <rickf@cableone.net>
Does anyone know if any of the parts Van's supplies in the slider kits for planes
such as the RV8, 9, etc. will work for the RV3. I'm thinking of things like
the:
1) rolling slider on the front of the canopy
2) windscreen/longeron attach bracket
3) canopy latch system
thanks for any advise,
Rick Fogerson,
RV3 finish kit
Boise, ID
Message 25
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--> RV-List message posted by: "Dr. Leathers" <DrLeathers@822heal.com>
Here Here!!!
Do not archive
----- Original Message -----
From: "Jim Norman" <jgnorman@tampabay.rr.com>
Subject: RE: RV-List: Free speed
> --> RV-List message posted by: "Jim Norman" <jgnorman@tampabay.rr.com>
>
> Careful everybody...
> LOTS of physics, aerodynamics, etc, etc at play here. There is very little
> free in life, and this may be the case here as well. Remember, the chance
of
> sucking exhaust fumes into the cabin may be as high as getting air OUT.
>
> ALSO, as a physics major (back when Bernoulli was alive), I have to tell
you
> that it is impossible to equalize pressure inside and outside the cabin.
The
> differences in air speed (slow inside the plane and fast outside) dictates
> that there will ALWAYS be a pressure difference.
>
> So... "danger Will Robinson!"... go slow partner.
>
> jim
> Tampa
>
> -----Original Message-----
> From: owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com]On Behalf Of Scott Bilinski
> To: rv-list@matronics.com
> Subject: Re: RV-List: Free speed
>
>
> --> RV-List message posted by: Scott Bilinski
> <bilinski@kyocera-wireless.com>
>
>
> So what I am hearing is, place a NACA scoop on the inside belly of the
> plane facing backwards so it pulls air out. Is this correct?
>
>
> At 12:10 PM 3/3/03 -0500, you wrote:
> >--> RV-List message posted by: LeastDrag93066@aol.com
> >
> >Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
> >increase by mechanically clamping the back of the canopy down to the
> >fuselage. (Early issue of the RVator)
> >What I read Russ suggesting is an aerodynamic clamp.
> >By providing an aerodynamically active outlet for the air pressure under
> the
> >canopy, it eliminates the slight positive pressure under the canopy
> (relative
> >to the Bernoulli's pulling the canopy up) and keeps the canopy against
the
> >fuselage.
> >
> >Jim Ayers
> >RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
> >
> >In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
> >bj034@lafn.org writes:
> >
> >> Russ,
> >>
> >> I don't think that increasing airflow through the fuselage is going to
> >> increase airspeed. However if you have a leak in your static system,
> >> lowering the pressure in the fuselage will increase the indicated
> airspeed.
> >>
> >> Dave RV6 So.Cal
> >> EAA Technical Counselor
> >>
> >>
> >> Russ Alnutt wrote:
> >>
> >> > --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
> >> >
> >> > I wish to share something with all RVers. I discovered this by
> accident.
> >> If you put a reverse scoop on the belly of your plane towards the back
> you
> >> will likely pickup about 5mph. I did this because I thought that the
> >> cockpit had to much positive pressure and couldn't get out. I was
> partially
> >> right. When you let the air out of the back the sliding canopy does not
> go
> >> our as far and the speed increases. Try it it will only cost you a
little
> >> time.
> >> >
> >> > rsalnutt@inreach.com
> >> >
> >>
> >
> >
>
>
> Scott Bilinski
> Eng dept 305
> Phone (858) 657-2536
> Pager (858) 502-5190
>
>
Message 26
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| Subject: | Re: Garmin GPS 35/AnywhereMap feeding a NavAid |
--> RV-List message posted by: Mark Phillips <ripsteel@edge.net>
Pretty much a po' mans glass cockpit, just without the megabux displays. You get
a
box with SS gyros, an airdata interface and a Garmin 35. You plug serial cables
from the Axims to a "Y" adapter cable that plugs into the main box, as does the
35, plus a power feed and cable to Navaid (with the pig thang). One PDA does
the
ADAHARS, FD, HITS and whatever other acronyms the software will support, the other
the GPS display. About the same system that Control Vision is selling, but this
will give actual (not just GPS) airspeed, altitude etc. Bear in mind I am NOT
going IFR with this, and have backup altimeter, & A/S. I've talked to several
"happy customers", seen the demo at OSH and am looking forward to playing with
it.
Only gyro in the panel is Navaid. Craig assures me the correct data will somehow
arrive there for WL operation.
However, I did finally take the Axim out in the sun today (first chance in weeks
as
you know!) and understand why the "real" displays are megabux. They look great
with the sun shining on them from over your shoulder, but get pretty dim on angles
or in shade, but still readable if you look at it hard enough. I compared it
against a 3800 series iPaq and the screens appear identical. Have you had any
real
trouble reading yours under various conditions?
From The PossumWorks north of AL
Mark
Sam Buchanan wrote:
> --> RV-List message posted by: Sam Buchanan <sbuc@hiwaay.net>
>
> Mark Phillips wrote:
> >
> > --> RV-List message posted by: Mark Phillips <ripsteel@edge.net>
> >
> > Hi Sam!
> >
> > The Dell Axim is now available with serial cable- Craig at PCFlightSystems
is
> > currently building one of their ADAHARS systems with GPS moving map to feed
> > two Axims. Won't have any air experience for a while yet, 8-( but it
> > will be test-flown in my truck soon 8-) for some basic evaluation and
> > familiarization!
> >
> > http://www.pcflightsystems.com/pcefis.html
> >
> > >From The PossumWorks in TN
> > Mark
>
> Well......ok......you have our curiosity aroused.......tell us more!
> =8
> O
>
> Just what are you sending to the "two Axims"?
>
> And, how does the serial cable work (what kind of connectors, etc)?
>
> Sounds like things are getting interesting in the Skunkworks. :-)
>
> Sam Buchanan
>
Message 27
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--> RV-List message posted by: Garry LeGare <versadek@earthlink.net>
Hi Russ,
If you look through the archives under keeping warm, cabin venting or cabin heat
you should find a thread that covers previous work done by Bob Japundza and
myself.
One caution I must pass on, about cutting holes, on the underside of the fuselage.
Under certain conditions you can get reverse flow and with it exhaust gas.
With a normal RV6 there is so much leakage that you may not notice, unless you
have a very sensitive CO detector. Once you start sealing up all the air leaks
the percentage of CO starts to become a serious problem. Anyone considering
doing something to reduce the cabin/tail pressure should be
very careful when considering this approach.
Casper
Russ Alnutt wrote:
> --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
>
> I wish to share something with all RVers. I discovered this by accident. If you
put a reverse scoop on the belly of your plane towards the back you will likely
pickup about 5mph. I did this because I thought that the cockpit had to much
positive pressure and couldn't get out. I was partially right. When you let
the air out of the back the sliding canopy does not go our as far and the speed
increases. Try it it will only cost you a little time.
>
> rsalnutt@inreach.com
>
Message 28
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--> RV-List message posted by: "Ron Rosenberg" <ronr@medicalpmrg.com>
Listers:
I'm flying an RV3 with a tip-over canopy. I'm not the builder. I'd like to
investigate what it will take to fabricate/install/purchase a slider.
Anyone have any info on the slider for the 3??
Ron Rosenberg, PA, MPH
Practice Management Resource Group
325 Pine St., Sausalito, CA 94965
Sausalito Office -(415)925-4334
Chicago Office - (312) 543-5480
www.medicalpmrg.com
Message 29
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|
--> RV-List message posted by: "van Bladeren, Ron" <rwv@nwnatural.com>
FWIW, I know of at least one line of production A/C, the Comanche and Twin
Comanche, that use a reverse facing scope on the belly specifically to vent
cabin air. We would find that cabin airflow would be reduced significantly
if one covered the 3" baggage floor hole leading to this vent with bags or
coats. The Comanche Flyer recommended checking to be sure this vent was
free from obstructions because a high rate of airflow through the cabin was
the best protection from exhaust fumes or (heaven forbid) fumes from an
electrical fire.
Ron.
-----Original Message-----
From: Jim Norman [mailto:jgnorman@tampabay.rr.com]
Subject: RE: RV-List: Free speed
--> RV-List message posted by: "Jim Norman" <jgnorman@tampabay.rr.com>
Careful everybody...
LOTS of physics, aerodynamics, etc, etc at play here. There is very little
free in life, and this may be the case here as well. Remember, the chance of
sucking exhaust fumes into the cabin may be as high as getting air OUT.
ALSO, as a physics major (back when Bernoulli was alive), I have to tell you
that it is impossible to equalize pressure inside and outside the cabin. The
differences in air speed (slow inside the plane and fast outside) dictates
that there will ALWAYS be a pressure difference.
So... "danger Will Robinson!"... go slow partner.
jim
Tampa
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com]On Behalf Of Scott Bilinski
Subject: Re: RV-List: Free speed
--> RV-List message posted by: Scott Bilinski
<bilinski@kyocera-wireless.com>
So what I am hearing is, place a NACA scoop on the inside belly of the
plane facing backwards so it pulls air out. Is this correct?
At 12:10 PM 3/3/03 -0500, you wrote:
>--> RV-List message posted by: LeastDrag93066@aol.com
>
>Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
>increase by mechanically clamping the back of the canopy down to the
>fuselage. (Early issue of the RVator)
>What I read Russ suggesting is an aerodynamic clamp.
>By providing an aerodynamically active outlet for the air pressure under
the
>canopy, it eliminates the slight positive pressure under the canopy
(relative
>to the Bernoulli's pulling the canopy up) and keeps the canopy against the
>fuselage.
>
>Jim Ayers
>RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
>
>In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
>bj034@lafn.org writes:
>
>> Russ,
>>
>> I don't think that increasing airflow through the fuselage is going to
>> increase airspeed. However if you have a leak in your static system,
>> lowering the pressure in the fuselage will increase the indicated
airspeed.
>>
>> Dave RV6 So.Cal
>> EAA Technical Counselor
>>
>>
>> Russ Alnutt wrote:
>>
>> > --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
>> >
>> > I wish to share something with all RVers. I discovered this by
accident.
>> If you put a reverse scoop on the belly of your plane towards the back
you
>> will likely pickup about 5mph. I did this because I thought that the
>> cockpit had to much positive pressure and couldn't get out. I was
partially
>> right. When you let the air out of the back the sliding canopy does not
go
>> our as far and the speed increases. Try it it will only cost you a little
>> time.
>> >
>> > rsalnutt@inreach.com
>> >
>>
>
>
Scott Bilinski
Eng dept 305
Phone (858) 657-2536
Pager (858) 502-5190
Message 30
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| Subject: | Odyssey Battery (best source these days) |
--> RV-List message posted by: Bill Dube <bdube@boulder.nist.gov>
At 09:58 AM 3/3/2003, you wrote:
>--> RV-List message posted by: "James E. Clark" <jclark@conterra.com>
The SVR batteries I mentioned on the list awhile back are superior
to both the Odyssey and the Panasonic batteries in cranking ability.
http://www.svrbatteries.com/download.html#
Model Cold Cranking Amps Amp-hrs weight (lbs) Max amps
SVR-14 250 CCA 14 11.5 850
SVR-20 300 CCA 18 15
SVR-18 350 CCA 22 17
PC-680 280 CCA 16 14 680
Electric drag racers, like myself, search for batteries that will
put out THE most power per pound. The SVR-14 will put out more than 850
amps without sagging below 7 volts. The Battle Bot competitors use this
brand of battery too. You can get them at a very reasonable price from
<evparts.com>. They are cheaper, from this source, than the PC-680.
The CCA test is based on delivering the CCA at zero F for 30
seconds without sagging below 7.2 volts. In reality, a healthy engine takes
less than 5 seconds to start, even in cold weather. If you think about it,
the "pulse" amps are more important than the CCA because if you can deliver
higher voltage in the beginning, you don't need to crank the engine for
very long. With a given starter amperage load, the SVR-14 is going to
deliver more voltage, will thus spin the starter faster and start it
quicker than the PC-680.
If anyone in the Denver area would like to try out an SVR-14, I'd
be happy to lend them one for a comparison test, as long as I get it back.
_ /| Bill "Wisenheimer" Dube'
\'o.O' <billdube@KillaCycle.com>
=(___) U Check out the bike -> http://www.KillaCycle.com
Message 31
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--> RV-List message posted by: Jim Oke <wjoke@shaw.ca>
Sound advice about the lack of a "free lunch" (or airspeed in this case).
In principle, yes, there will always be reduced pressure outside the
canopy/fuselage compared to inside. If a canopy air leak is present, the
leaking "high pressure" air could in theory disrupt the flow in the canopy
area causing flow separation and a corresponding drag increase. Glider
pilots go to some lengths in sealing their canopies for this reason and also
often seal aileron and elevator hinge gaps to avoid lower surface to upper
surface (high to low) pressure air leakage.
Having said this, an RV-6 canopy will be subjected to a highly turbulent,
swirling flow from the propeller and it is hard to imagine a canopy air leak
big enough to compete with this sort of flow and cause an unusual flow
separation.
The question is if there is an area of separated flow around an RV-6 canopy
that can be shown to be caused by air leaking out past the edges of the
canopy. If yes, then the trade off to consider is if the drag caused by an
additional air inlet in the fuselage underside is greater or lesser than the
drag resulting from the flow separation caused by the leaking air. That
would be the "lunch deal" that is actually on offer.
Can anyone else report on the "before vs. after" results of sealing an RV
canopy? A 5 mph increase in cruise speed would represent a fair bit of drag
reduction in horsepower terms.
Jim Oke
RV-6A (at the airport, but still too $%
& cold for an engine run)
Winnipeg, MB
----- Original Message -----
From: "Jim Norman" <jgnorman@tampabay.rr.com>
Subject: RE: RV-List: Free speed
> --> RV-List message posted by: "Jim Norman" <jgnorman@tampabay.rr.com>
>
> Careful everybody...
> LOTS of physics, aerodynamics, etc, etc at play here. There is very little
> free in life, and this may be the case here as well. Remember, the chance
of
> sucking exhaust fumes into the cabin may be as high as getting air OUT.
>
> ALSO, as a physics major (back when Bernoulli was alive), I have to tell
you
> that it is impossible to equalize pressure inside and outside the cabin.
The
> differences in air speed (slow inside the plane and fast outside) dictates
> that there will ALWAYS be a pressure difference.
>
> So... "danger Will Robinson!"... go slow partner.
>
> jim
> Tampa
>
> -----Original Message-----
> From: owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com]On Behalf Of Scott Bilinski
> To: rv-list@matronics.com
> Subject: Re: RV-List: Free speed
>
>
> --> RV-List message posted by: Scott Bilinski
> <bilinski@kyocera-wireless.com>
>
>
> So what I am hearing is, place a NACA scoop on the inside belly of the
> plane facing backwards so it pulls air out. Is this correct?
>
>
> At 12:10 PM 3/3/03 -0500, you wrote:
> >--> RV-List message posted by: LeastDrag93066@aol.com
> >
> >Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
> >increase by mechanically clamping the back of the canopy down to the
> >fuselage. (Early issue of the RVator)
> >What I read Russ suggesting is an aerodynamic clamp.
> >By providing an aerodynamically active outlet for the air pressure under
> the
> >canopy, it eliminates the slight positive pressure under the canopy
> (relative
> >to the Bernoulli's pulling the canopy up) and keeps the canopy against
the
> >fuselage.
> >
> >Jim Ayers
> >RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
> >
> >In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
> >bj034@lafn.org writes:
> >
> >> Russ,
> >>
> >> I don't think that increasing airflow through the fuselage is going to
> >> increase airspeed. However if you have a leak in your static system,
> >> lowering the pressure in the fuselage will increase the indicated
> airspeed.
> >>
> >> Dave RV6 So.Cal
> >> EAA Technical Counselor
> >>
> >>
> >> Russ Alnutt wrote:
> >>
> >> > --> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
> >> >
> >> > I wish to share something with all RVers. I discovered this by
> accident.
> >> If you put a reverse scoop on the belly of your plane towards the back
> you
> >> will likely pickup about 5mph. I did this because I thought that the
> >> cockpit had to much positive pressure and couldn't get out. I was
> partially
> >> right. When you let the air out of the back the sliding canopy does not
> go
> >> our as far and the speed increases. Try it it will only cost you a
little
> >> time.
> >> >
> >> > rsalnutt@inreach.com
> >> >
> >>
> >
> >
>
>
> Scott Bilinski
> Eng dept 305
> Phone (858) 657-2536
> Pager (858) 502-5190
>
>
Message 32
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--> RV-List message posted by: Jim Oke <wjoke@shaw.ca>
Ron;
The best idea might be to seek out an older set of RV-3 plans as these will
shown the original sliding canopy configuration going back to 1975 or so.
Perhaps Van's can supply the few sheets of drawings or you could borrow same
from another RV-3 builder or flyer. In principle, I would say a slider
retrofit should be possible but with some significant work in the cockpit
area.
One caution is that the older RV-3 kits had much less prefab and almost none
of the pre-made parts that RV builders are used to today. My "canopy kit"
circa 1988 was a bundle of 4130 tube and the canopy plexi and literally
nothing else except the drawings. Do not expect to find a lot of "off the
shelf" stuff if you decide to go this route.
Jim Oke
Winnipeg, MB
RV-3 C-FIZM (flying)
RV-6A C-GKGZ (final details)
----- Original Message -----
From: "Ron Rosenberg" <ronr@medicalpmrg.com>
Subject: RV-List: RV3 Canopy
> --> RV-List message posted by: "Ron Rosenberg" <ronr@medicalpmrg.com>
>
> Listers:
>
> I'm flying an RV3 with a tip-over canopy. I'm not the builder. I'd like
to
> investigate what it will take to fabricate/install/purchase a slider.
> Anyone have any info on the slider for the 3??
>
> Ron Rosenberg, PA, MPH
> Practice Management Resource Group
> 325 Pine St., Sausalito, CA 94965
> Sausalito Office -(415)925-4334
> Chicago Office - (312) 543-5480
> www.medicalpmrg.com
>
>
Message 33
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--> RV-List message posted by: Bill Dube <bdube@boulder.nist.gov>
Did you check the speed increase with a GPS, or did you rely on the air
speed indicator?
It is possible that the reduction in cabin pressure is altering the static
pressure on the air speed indicator causing it to read a bit high. If the
static system is incorrectly installed or is a bit leaky, this can occur.
Just a thought.
Message 34
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--> RV-List message posted by: Bill Marvel <bmarvel@cox.net>
Wish my -8A had the problem of pressurized air in the cockpit trying to get
out instead of the torrent of outside air coming in under the aft part of the
skirt and blowing forward. I cook in the front with the heat on and the back
seater freezes because of the air flowing in from the rear. Just starting to
address this, so hopefully something will be in the archives about it.
Bill Marvel
DO NOT ARCHIVE
--
Bill Marvel Home/office 310 832 7617
P.O. Box 784 Cell 310 293 2013
San Pedro, CA 90733 Fax 310 832 5334
One good deed beats 100 good intentions...
Message 35
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--> RV-List message posted by: Gert <gert@execpc.com>
Sooo, proof would be in the pudding so to say if one looses the speed
gain again if one were to duct-tape the belly hole over, or make an
adjustable sliding cover......
Gert
Jim Oke wrote:
> --> RV-List message posted by: Jim Oke <wjoke@shaw.ca>
>
> Sound advice about the lack of a "free lunch" (or airspeed in this case).
>
> In principle, yes, there will always be reduced pressure outside the
> canopy/fuselage compared to inside. If a canopy air leak is present, the
> leaking "high pressure" air could in theory disrupt the flow in the canopy
> area causing flow separation and a corresponding drag increase. Glider
> pilots go to some lengths in sealing their canopies for this reason and also
> often seal aileron and elevator hinge gaps to avoid lower surface to upper
> surface (high to low) pressure air leakage.
>
> Having said this, an RV-6 canopy will be subjected to a highly turbulent,
> swirling flow from the propeller and it is hard to imagine a canopy air leak
> big enough to compete with this sort of flow and cause an unusual flow
> separation.
>
> The question is if there is an area of separated flow around an RV-6 canopy
> that can be shown to be caused by air leaking out past the edges of the
> canopy. If yes, then the trade off to consider is if the drag caused by an
> additional air inlet in the fuselage underside is greater or lesser than the
> drag resulting from the flow separation caused by the leaking air. That
> would be the "lunch deal" that is actually on offer.
>
> Can anyone else report on the "before vs. after" results of sealing an RV
> canopy? A 5 mph increase in cruise speed would represent a fair bit of drag
> reduction in horsepower terms.
>
> Jim Oke
> RV-6A (at the airport, but still too $%
> & cold for an engine run)
> Winnipeg, MB
>
>
> ----- Original Message -----
> From: "Jim Norman" <jgnorman@tampabay.rr.com>
> To: <rv-list@matronics.com>
> Subject: RE: RV-List: Free speed
>
>
>
>>--> RV-List message posted by: "Jim Norman" <jgnorman@tampabay.rr.com>
>>
>>Careful everybody...
>>LOTS of physics, aerodynamics, etc, etc at play here. There is very little
>>free in life, and this may be the case here as well. Remember, the chance
>>
> of
>
>>sucking exhaust fumes into the cabin may be as high as getting air OUT.
>>
>>ALSO, as a physics major (back when Bernoulli was alive), I have to tell
>>
> you
>
>>that it is impossible to equalize pressure inside and outside the cabin.
>>
> The
>
>>differences in air speed (slow inside the plane and fast outside) dictates
>>that there will ALWAYS be a pressure difference.
>>
>>So... "danger Will Robinson!"... go slow partner.
>>
>>jim
>>Tampa
>>
>>-----Original Message-----
>>From: owner-rv-list-server@matronics.com
>>[mailto:owner-rv-list-server@matronics.com]On Behalf Of Scott Bilinski
>>To: rv-list@matronics.com
>>Subject: Re: RV-List: Free speed
>>
>>
>>--> RV-List message posted by: Scott Bilinski
>><bilinski@kyocera-wireless.com>
>>
>>
>>So what I am hearing is, place a NACA scoop on the inside belly of the
>>plane facing backwards so it pulls air out. Is this correct?
>>
>>
>>At 12:10 PM 3/3/03 -0500, you wrote:
>>
>>>--> RV-List message posted by: LeastDrag93066@aol.com
>>>
>>>Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
>>>increase by mechanically clamping the back of the canopy down to the
>>>fuselage. (Early issue of the RVator)
>>>What I read Russ suggesting is an aerodynamic clamp.
>>>By providing an aerodynamically active outlet for the air pressure under
>>>
>>the
>>
>>>canopy, it eliminates the slight positive pressure under the canopy
>>>
>>(relative
>>
>>>to the Bernoulli's pulling the canopy up) and keeps the canopy against
>>>
> the
>
>>>fuselage.
>>>
>>>Jim Ayers
>>>RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
>>>
>>>In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
>>>bj034@lafn.org writes:
>>>
>>>
>>>>Russ,
>>>>
>>>>I don't think that increasing airflow through the fuselage is going to
>>>>increase airspeed. However if you have a leak in your static system,
>>>>lowering the pressure in the fuselage will increase the indicated
>>>>
>>airspeed.
>>
>>>>Dave RV6 So.Cal
>>>>EAA Technical Counselor
>>>>
>>>>
>>>>Russ Alnutt wrote:
>>>>
>>>>
>>>>>--> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
>>>>>
>>>>>I wish to share something with all RVers. I discovered this by
>>>>>
>>accident.
>>
>>>>If you put a reverse scoop on the belly of your plane towards the back
>>>>
>>you
>>
>>>>will likely pickup about 5mph. I did this because I thought that the
>>>>cockpit had to much positive pressure and couldn't get out. I was
>>>>
>>partially
>>
>>>>right. When you let the air out of the back the sliding canopy does not
>>>>
>>go
>>
>>>>our as far and the speed increases. Try it it will only cost you a
>>>>
> little
>
>>>>time.
>>>>
>>>>>rsalnutt@inreach.com
>>>>>
>>>>>
>>>
>>
>>Scott Bilinski
>>Eng dept 305
>>Phone (858) 657-2536
>>Pager (858) 502-5190
>>
>>
>>
>
>
>
>
>
>
>
>
--
is subject to a download and archival fee in the amount of $500
Message 36
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--> RV-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
Does anyone have a template for cutting the RV-8 flap to fit up against
the fuse?
-
Larry Bowen
Larry@BowenAero.com
http://BowenAero.com
2003 - The year of flight!
Message 37
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--> RV-List message posted by: "John Huft" <aflyer@direcway.com>
I have stayed there several times, at the Dockside Motel, and Sawgrass Motel
(next door). Either one is good, and pretty cheap, the Cedar Key web page
has phone numbers. Ollie is correct about the cab...it will be waiting when
you land, but it will cost you. If you don't have luggage, it is only about
a 2 mile walk to town. The restaurants seem to change every year.
I enjoy going there on the way home from sun n fun...it is very laid back, a
different universe from the flyin.
John Huft
Pagosa Springs, CO
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com]On Behalf Of Ollie Washburn
Subject: Re: RV-List: Cedar Key, Fl
--> RV-List message posted by: "Ollie Washburn" <skybolt-aviator@msn.com>
I have only been to Cedar Key a couple of times even though i only live
about 20mins.away in RV so don't know about accommodations except they have
several resturants.HOWEVER the taxi ride to town is $5 PER person and $5 PER
person back to airport.
Ollie 6A Central Fl.
----- Original Message -----
From: Lenleg@aol.com
Subject: RV-List: Cedar Key, Fl
--> RV-List message posted by: Lenleg@aol.com
We have several RVs making a trip to the Keys in May with a night over in
Cedar Key ... has been a while since I stayed there ... do any of you
Florida
guys have suggestions for hotels, bed & breakfast, restaurants?
Thanks !!
Len Leggette RV-8A
N901LL
Greensboro, N.C.
57 hours !!
Message 38
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| Subject: | Re: Garmin GPS 35/AnywhereMap feeding a NavAid |
--> RV-List message posted by: Sam Buchanan <sbuc@hiwaay.net>
Mark Phillips wrote:
>
> --> RV-List message posted by: Mark Phillips <ripsteel@edge.net>
>
> Pretty much a po' mans glass cockpit, just without the megabux displays. You
get a
> box with SS gyros, an airdata interface and a Garmin 35. You plug serial cables
> from the Axims to a "Y" adapter cable that plugs into the main box, as does the
> 35, plus a power feed and cable to Navaid (with the pig thang). One PDA does
the
> ADAHARS, FD, HITS and whatever other acronyms the software will support, the
other
> the GPS display. About the same system that Control Vision is selling, but this
> will give actual (not just GPS) airspeed, altitude etc. Bear in mind I am NOT
> going IFR with this, and have backup altimeter, & A/S. I've talked to several
> "happy customers", seen the demo at OSH and am looking forward to playing with
it.
> Only gyro in the panel is Navaid. Craig assures me the correct data will somehow
> arrive there for WL operation.
>
> However, I did finally take the Axim out in the sun today (first chance in weeks
as
> you know!) and understand why the "real" displays are megabux. They look great
> with the sun shining on them from over your shoulder, but get pretty dim on angles
> or in shade, but still readable if you look at it hard enough. I compared it
> against a 3800 series iPaq and the screens appear identical. Have you had any
real
> trouble reading yours under various conditions?
>
> >From The PossumWorks north of AL
> Mark
Mark, glad to hear you got your shop back on the wheels after that wind
storm...... ;-)
Interesting. I looked at the PCFlight thang at the Big Show last summer
but kinda wrote it off since AnywhereMap seemed a lot more
sofisti......soffista........purty. However, I thank we are gonna see
more 'n more stuff that will drive the PDA's, and some of it is gonna be
real good.
I have always been able to read the 3765 iPAQ screen, but some light
conditions are better than others. You know how the air gits real green
right agin a big thunderstorm? It shows up real good then........
Better let you go......one of the cars fell off the blocks last
night.......probably got knocked off when those stupid dogs started
fightin'......or whatever it is they do when they git all stirred up.
Sam Buchanan
Message 39
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| Subject: | Re: Air-Data Computer |
--> RV-List message posted by: Jerry Springer <jsflyrv@earthlink.net>
What are you building Richard. Looks like just plain old spam to me.
I could be wrong.
Jerry
do not archive
---------------------
richard soennichsen wrote:
> --> RV-List message posted by: richard soennichsen <richas@yahoo.com>
>
>
> Hey all,
>
> A buddy turned me onto this (the creators presented at the local EAA meeting),
a Hell of a value in flight computers. Check it out:
>
> www.fdatasystems.com
>
>
> Richard
>
>
>
>
>
>
>
Message 40
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--> RV-List message posted by: Jerry Springer <jsflyrv@earthlink.net>
Pretty soon my old RV-6 is going to be as fast as a Harmon Rocket.
I am getting ready to change the wheel pants, that well give me 6 mph
and now the reverse air scoop another 5 mph there is 11 mph free
airspeed gain. Yah right!!!!
Jerry
do not archive
HCRV6@aol.com wrote:
> --> RV-List message posted by: HCRV6@aol.com
>
> In a message dated 3/2/03 7:43:21 PM Pacific Standard Time,
> rsalnutt@inreach.com writes:
>
> << I wish to share something with all RVers. I discovered this by accident.
> If you put a reverse scoop on the belly of your plane towards the back you
> will likely pickup about 5mph. >>
>
> How about a little more information, like where exactly and what size scoop.
> Was this a NASA type air scoop? It seems to me that these details could be
> very relevant to the performance gain you are seeing. Thanks.
>
> Harry Crosby
> Pleasanton, California
> RV-6, firewall forward
>
>
>
>
>
>
>
Message 41
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|
--> RV-List message posted by: RGray67968@aol.com
For the archives:
Folks,
Did a little test today: I put the Prop Guard leading edge tape on my
Warnke prop and took some performance numbers - nothing real serious as far
as data goes but enough to convince me. All numbers are from 3000' in super
calm 28 deg.F air at the same heading.
Plane is a RV6 w/O-360 and a Warnke ACS Air Claw prop. Me and my son (the
scribe) on board w/half tanks. Plane weighs 1038lbs.
BEFORE leading edge tape installed - 2400rpm = 193 mph IAS, 2500 rpm = 202
mph IAS, 2700 rpm = 212 mph IAS (full throttle). Climb - ~1800 fpm at 130
mph IAS from 3000' to 5000' (error on the low side).
AFTER leading edge tape installed - 2400rpm = 181 mph IAS, 2500 rpm - 189 mph
IAS, 2700 rpm = 200 mph IAS (would rev an additional 150 rpm to about 2850 at
full throttle). Climb - ~1300 fpm at 130 mph IAS from 3000' to 5000' (error
on the high side).
Guess what - I took the tape off!
Rick Gray RV6 146 hrs in Ohio at the Buffalo Farm - BOTH hands are in the air
for Sun & Fun - see ya' there.
please archive
Message 42
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--> RV-List message posted by: "Charles Rowbotham" <crowbotham@hotmail.com>
Rick,
We did not see the performance loss you experienced, but are using a c/s
prop. Even if we did see the same loss we would not remove the tape. We have
not had any nicks or erosion that other users experienced. As most of you
are aware the cost of rplacing/repairing a c/s prop is high. Prop Guard is
highly recommended, unless you can afford to replace/repair your prop. A
note our airport is in pretty good shape but alittle sand is always around
and you'd be surprised the nicks you pick up from pebbles.
Chuck & Dave Rowbotham
RV-8A Westerly, RI
>From: RGray67968@aol.com
>Reply-To: rv-list@matronics.com
>To: rv-list@matronics.com
>Subject: RV-List: Prop Tape
>Date: Mon, 3 Mar 2003 21:45:06 EST
>
>--> RV-List message posted by: RGray67968@aol.com
>
>For the archives:
>
>Folks,
> Did a little test today: I put the Prop Guard leading edge tape on
>my
>Warnke prop and took some performance numbers - nothing real serious as far
>as data goes but enough to convince me. All numbers are from 3000' in super
>calm 28 deg.F air at the same heading.
>
>Plane is a RV6 w/O-360 and a Warnke ACS Air Claw prop. Me and my son (the
>scribe) on board w/half tanks. Plane weighs 1038lbs.
>
>BEFORE leading edge tape installed - 2400rpm = 193 mph IAS, 2500 rpm = 202
>mph IAS, 2700 rpm = 212 mph IAS (full throttle). Climb - ~1800 fpm at 130
>mph IAS from 3000' to 5000' (error on the low side).
>
>
>AFTER leading edge tape installed - 2400rpm = 181 mph IAS, 2500 rpm - 189
>mph
>IAS, 2700 rpm = 200 mph IAS (would rev an additional 150 rpm to about 2850
>at
>full throttle). Climb - ~1300 fpm at 130 mph IAS from 3000' to 5000'
>(error
>on the high side).
>
>Guess what - I took the tape off!
>
>Rick Gray RV6 146 hrs in Ohio at the Buffalo Farm - BOTH hands are in the
>air
>for Sun & Fun - see ya' there.
>
>please archive
>
>
Message 43
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| Subject: | Dynon developments- EFIS-D10 |
--> RV-List message posted by: "Jim Jewell" <jjewell@telus.net>
I have seen no mention today of the long awaited EFIS D-10
Today is the third of march. The day that Dynon developments is acepting orders
for their EFIS unit.
I talked to Nick this morning and he sounded pleased with the number of orders
that they had recieved by 10:00 am.
I ordered mine and hope to hear it will be shipped soon. I think the wait will
prove to be wothwhile.
Have any others on the list ordered theirs?
Jim in Kelowna - control panel planning and some primary wiring.
Message 44
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--> RV-List message posted by: LeastDrag93066@aol.com
Jerry VanGrunsven flew a fixed ground distance (marked with multiple passes),
and recorded the time to determine the speed of his aircraft. It's all in
the early RVator in which he wrote the article.
By retaining the rear of the RV-3 sliding canopy, he gained 5 mph average
ground speed.
BTW, regardless of which RV you have, specifically where is your cockpit air
outlet? :-)
Jim Ayers
Message 45
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| Subject: | Dynon developments- EFIS-D10 |
--> RV-List message posted by: "Noel & Yoshie Simmons" <noel@blueskyaviation.net>
I ordered one today too. Really looking forward to it.
Noel and Yoshie Simmons
Blue Sky Aviation, Inc.
"We do builder assistance!"
Toll Free: 866-859-0390
info@blueskyaviation.net <mailto:info@blueskyaviation.net>
www.blueskyaviation.net <http://www.blueskyaviation.net>
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com]On Behalf Of Jim Jewell
Subject: RV-List: Dynon developments- EFIS-D10
--> RV-List message posted by: "Jim Jewell" <jjewell@telus.net>
I have seen no mention today of the long awaited EFIS D-10
Today is the third of march. The day that Dynon developments is acepting
orders for their EFIS unit.
I talked to Nick this morning and he sounded pleased with the number of
orders that they had recieved by 10:00 am.
I ordered mine and hope to hear it will be shipped soon. I think the wait
will prove to be wothwhile.
Have any others on the list ordered theirs?
Jim in Kelowna - control panel planning and some primary wiring.
Message 46
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--> RV-List message posted by: Jim Oke <wjoke@shaw.ca>
Yes, that would about do it. Now all we need is a volunteer to cut the hole
in his RV to try the experiment!
(Well, maybe a flight with some tape around the canopy edge would do as
well. Taping one's canopy shut will obviously be not good for emergency
egress so this should not be done without suitable forethought. Taping a
strip of lightweight paper over the gap that would tear if needed is one
possibility.)
Jim Oke
Winnipeg, MB
RV-3
RV-6A
Do Not Archive
----- Original Message -----
From: "Gert" <gert@execpc.com>
Subject: Re: RV-List: Free speed
> --> RV-List message posted by: Gert <gert@execpc.com>
>
> Sooo, proof would be in the pudding so to say if one looses the speed
> gain again if one were to duct-tape the belly hole over, or make an
> adjustable sliding cover......
>
> Gert
>
> Jim Oke wrote:
>
> > --> RV-List message posted by: Jim Oke <wjoke@shaw.ca>
> >
> > Sound advice about the lack of a "free lunch" (or airspeed in this
case).
> >
> > In principle, yes, there will always be reduced pressure outside the
> > canopy/fuselage compared to inside. If a canopy air leak is present, the
> > leaking "high pressure" air could in theory disrupt the flow in the
canopy
> > area causing flow separation and a corresponding drag increase. Glider
> > pilots go to some lengths in sealing their canopies for this reason and
also
> > often seal aileron and elevator hinge gaps to avoid lower surface to
upper
> > surface (high to low) pressure air leakage.
> >
> > Having said this, an RV-6 canopy will be subjected to a highly
turbulent,
> > swirling flow from the propeller and it is hard to imagine a canopy air
leak
> > big enough to compete with this sort of flow and cause an unusual flow
> > separation.
> >
> > The question is if there is an area of separated flow around an RV-6
canopy
> > that can be shown to be caused by air leaking out past the edges of the
> > canopy. If yes, then the trade off to consider is if the drag caused by
an
> > additional air inlet in the fuselage underside is greater or lesser than
the
> > drag resulting from the flow separation caused by the leaking air. That
> > would be the "lunch deal" that is actually on offer.
> >
> > Can anyone else report on the "before vs. after" results of sealing an
RV
> > canopy? A 5 mph increase in cruise speed would represent a fair bit of
drag
> > reduction in horsepower terms.
> >
> > Jim Oke
> > RV-6A (at the airport, but still too $%
> > & cold for an engine run)
> > Winnipeg, MB
> >
> >
> > ----- Original Message -----
> > From: "Jim Norman" <jgnorman@tampabay.rr.com>
> > To: <rv-list@matronics.com>
> > Subject: RE: RV-List: Free speed
> >
> >
> >
> >>--> RV-List message posted by: "Jim Norman" <jgnorman@tampabay.rr.com>
> >>
> >>Careful everybody...
> >>LOTS of physics, aerodynamics, etc, etc at play here. There is very
little
> >>free in life, and this may be the case here as well. Remember, the
chance
> >>
> > of
> >
> >>sucking exhaust fumes into the cabin may be as high as getting air OUT.
> >>
> >>ALSO, as a physics major (back when Bernoulli was alive), I have to tell
> >>
> > you
> >
> >>that it is impossible to equalize pressure inside and outside the cabin.
> >>
> > The
> >
> >>differences in air speed (slow inside the plane and fast outside)
dictates
> >>that there will ALWAYS be a pressure difference.
> >>
> >>So... "danger Will Robinson!"... go slow partner.
> >>
> >>jim
> >>Tampa
> >>
> >>-----Original Message-----
> >>From: owner-rv-list-server@matronics.com
> >>[mailto:owner-rv-list-server@matronics.com]On Behalf Of Scott Bilinski
> >>To: rv-list@matronics.com
> >>Subject: Re: RV-List: Free speed
> >>
> >>
> >>--> RV-List message posted by: Scott Bilinski
> >><bilinski@kyocera-wireless.com>
> >>
> >>
> >>So what I am hearing is, place a NACA scoop on the inside belly of the
> >>plane facing backwards so it pulls air out. Is this correct?
> >>
> >>
> >>At 12:10 PM 3/3/03 -0500, you wrote:
> >>
> >>>--> RV-List message posted by: LeastDrag93066@aol.com
> >>>
> >>>Jerry VanGrunsven's initial flight test data on his RV-3 stated a 5 mph
> >>>increase by mechanically clamping the back of the canopy down to the
> >>>fuselage. (Early issue of the RVator)
> >>>What I read Russ suggesting is an aerodynamic clamp.
> >>>By providing an aerodynamically active outlet for the air pressure
under
> >>>
> >>the
> >>
> >>>canopy, it eliminates the slight positive pressure under the canopy
> >>>
> >>(relative
> >>
> >>>to the Bernoulli's pulling the canopy up) and keeps the canopy against
> >>>
> > the
> >
> >>>fuselage.
> >>>
> >>>Jim Ayers
> >>>RV-3 N47RV sn50 LOM M332A engine MT electric CS propeller :-)
> >>>
> >>>In a message dated 03/03/2003 7:54:28 AM Pacific Standard Time,
> >>>bj034@lafn.org writes:
> >>>
> >>>
> >>>>Russ,
> >>>>
> >>>>I don't think that increasing airflow through the fuselage is going to
> >>>>increase airspeed. However if you have a leak in your static system,
> >>>>lowering the pressure in the fuselage will increase the indicated
> >>>>
> >>airspeed.
> >>
> >>>>Dave RV6 So.Cal
> >>>>EAA Technical Counselor
> >>>>
> >>>>
> >>>>Russ Alnutt wrote:
> >>>>
> >>>>
> >>>>>--> RV-List message posted by: "Russ Alnutt" <rsalnutt@inreach.com>
> >>>>>
> >>>>>I wish to share something with all RVers. I discovered this by
> >>>>>
> >>accident.
> >>
> >>>>If you put a reverse scoop on the belly of your plane towards the back
> >>>>
> >>you
> >>
> >>>>will likely pickup about 5mph. I did this because I thought that the
> >>>>cockpit had to much positive pressure and couldn't get out. I was
> >>>>
> >>partially
> >>
> >>>>right. When you let the air out of the back the sliding canopy does
not
> >>>>
> >>go
> >>
> >>>>our as far and the speed increases. Try it it will only cost you a
> >>>>
> > little
> >
> >>>>time.
> >>>>
> >>>>>rsalnutt@inreach.com
> >>>>>
> >>>>>
> >>>
> >>
> >>Scott Bilinski
> >>Eng dept 305
> >>Phone (858) 657-2536
> >>Pager (858) 502-5190
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> is subject to a download and archival fee in the amount of $500
>
>
Message 47
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| Subject: | Dynon developments- EFIS-D10 |
--> RV-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
I'm ready to order mine, but was scared to be serial number 00001.
Maybe later this week or next. When do you expect to receive yours?
-
Larry Bowen
RV-8 - wires, trimming flaps, etc....
Larry@BowenAero.com
http://BowenAero.com
2003 - The year of flight!
> -----Original Message-----
> From: owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com] On Behalf Of Jim Jewell
> Sent: Monday, March 03, 2003 10:51 PM
> To: rv-list@matronics.com
> Subject: RV-List: Dynon developments- EFIS-D10
>
>
> --> RV-List message posted by: "Jim Jewell" <jjewell@telus.net>
>
> I have seen no mention today of the long awaited EFIS D-10
> Today is the third of march. The day that Dynon developments
> is acepting orders for their EFIS unit. I talked to Nick this
> morning and he sounded pleased with the number of orders that
> they had recieved by 10:00 am. I ordered mine and hope to
> hear it will be shipped soon. I think the wait will prove to
> be wothwhile. Have any others on the list ordered theirs?
>
> Jim in Kelowna - control panel planning and some primary wiring.
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