Today's Message Index:
----------------------
1. 02:59 AM - Re: AoA (Steve Sampson)
2. 04:37 AM - Re: AoA (Charles Rowbotham)
3. 04:58 AM - Re: rpm run up vs tail wheel staying down (Alex Peterson)
4. 05:18 AM - Re: rpm run up vs tail wheel staying down (Chuck Jensen)
5. 05:35 AM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (Chuck Jensen)
6. 07:49 AM - Re riding moer to use as tug (charles heathco)
7. 08:34 AM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (Tracy Crook)
8. 09:00 AM - Re: AoA (Mickey Coggins)
9. 09:27 AM - Fw: rpm run up vs tail wheel staying down (Trevor)
10. 10:11 AM - Re: Re riding moer to use as tug (Tim Bryan)
11. 10:35 AM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (Vanremog@aol.com)
12. 11:26 AM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (JOHN STARN)
13. 12:56 PM - Towbar powered with corless drill (Amit Dagan)
14. 01:25 PM - Re: Re riding moer to use as tug (Mark)
15. 02:19 PM - Rv8 Flap Actuator Cover Template (Doug Bell)
16. 03:04 PM - Re: AoA (Dan Beadle)
17. 03:06 PM - Towbar powered with cordless drill (Ralph E. Capen)
18. 03:31 PM - Re: AoA (gert)
19. 04:30 PM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (David Leonard)
20. 05:31 PM - Re: [RV-8] Rv8 Flap Actuator Cover Template (luckymacy@comcast.net (lucky))
21. 05:46 PM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (Fly n Low)
22. 05:54 PM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (Jim Jewell)
23. 06:17 PM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (Jim Jewell)
24. 08:50 PM - Happy New Year (Mannan J. Thomason)
25. 10:44 PM - Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF (Bob Perkinson)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
--> RV-List message posted by: "Steve Sampson" <SSampson.SLN21@london.edu>
Todd - that is really helpful and confirms the way I was leaning. I think I
will save my money and perhaps implement the D10A - or similar - approach
since it costs little extra. I wonder how the sound on that works?????
I am building a -4, and had a D10 on a -9A. The reality was that I did not
use the AoA on the -9A, since I did not have time to look down, since I
operate out of a very short strip! If someone would implement a system which
gave a varying tone - like a glider vario - I think I would be interested.
In the meantime I think I will continue to gently stall in the circuit to
get the 'f'eel', trim, and continue that way.
Perhaps I should think about vortex generators. I will search for vortex
stuff wrt to the -4.
Todd, thanks again. You have just saved me several hundred $$. Steve.
PS The other idea I might play with is embedding one of the vibrators out of
a mobile phone in the stick grip. That to me - if its poweful enough - would
be the ideal way of attracting attention. So much of the feedback in a STOL
landing is coming through your right hand it seems the perfect place for a
human input channel.
----- Original Message -----
From: "Todd Bartrim" <haywire@telus.net>
Subject: RE: RV-List: AoA
> --> RV-List message posted by: "Todd Bartrim" <haywire@telus.net>
>
> Hi Steve;
> I have both the PSS AOA and the D10 with AOA. I bought the PSS
> system early
> in my build and bought the D10 after first flight. The PSS system should
> be
> a better system due to it's direct measurement of AOA, while the D10 is an
> inferred measurement, however I have found them to track each other
> perfectly and both give accurate warning of a stall. The only time they
> don't track together is during a turn and this is expected as I have them
> mounted on opposite wings.
> The early D10 doesn't have any audio output, so the PSS system is
> nice to
> have for this feature and I also mounted my PSS LED display on the
> glaresheild which gives me a crude but effective poor man's HUD, which is
> visible in all but direct sunlight.
> If I was building today I would just go with the new Dynon or
> comparable
> EFIS that has this feature as it has proven (to me) to be as accurate as a
> stand alone system.
>
> Todd
>
> --> RV-List message posted by: "Steve Sampson" <SSampson.SLN21@london.edu>
>
> Has anyone experience of using both the AoA in the Dynon D10A and the
> dedicated systems (Advanced Flight Systems and Lift Reserve Co.). For the
> money you pay I would hope the later systems are providing a whole lot
> more
> info., but I wonder?
>
> My only data point is that I have flown with the non audio D10 system and
> it
> appeared to give a very repeatable forecast of the stall.
>
> Thanks, Steve.
>
>
> ______________________________________________________________________
>
> This email has been scanned by the MessageLabs Email Security System
> on behalf of the London Business School community.
> For more information please visit http://www.messagelabs.com/email
> ______________________________________________________________________
>
>
> --
>
>
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
--> RV-List message posted by: "Charles Rowbotham" <crowbotham@hotmail.com>
Guys,
Excellent point about looking down.
The solution is a HUD - Which I expect we will see in the near future.
In the mean time PSS's AOA has a mount for their Pro model the is placed
above the glare shield in your pheriphal vision and timed into your headset
jack. You have all the info without looking down. We have been flying with
it since 2001 and it works great.
Chuck Rowbotham
RV-8A
>From: "Steve Sampson" <SSampson.SLN21@london.edu>
>Reply-To: rv-list@matronics.com
>To: <rv-list@matronics.com>
>Subject: Re: RV-List: AoA
>Date: Sat, 31 Dec 2005 10:41:41 -0000
>
>--> RV-List message posted by: "Steve Sampson" <SSampson.SLN21@london.edu>
>
>Todd - that is really helpful and confirms the way I was leaning. I think I
>will save my money and perhaps implement the D10A - or similar - approach
>since it costs little extra. I wonder how the sound on that works?????
>
>I am building a -4, and had a D10 on a -9A. The reality was that I did not
>use the AoA on the -9A, since I did not have time to look down, since I
>operate out of a very short strip!
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | rpm run up vs tail wheel staying down |
--> RV-List message posted by: "Alex Peterson" <alexpeterson@earthlink.net>
> --> RV-List message posted by: "Tom & Cathy Ervin"
> --> <tcervin@valkyrie.net>
>
> Alex, I'll try your procedure and see if it helps. I built
> my brake pedals with a forward slant of 10 degrees since my
> feet are so big...size 12 1/2.
> The forward slant may be making hard to get full forward pedal motion.
>
>
> Tom in Ohio
Try it without shoes, then you'll know just where the pressure is being put.
Alex Peterson
RV6-A N66AP 702 hours
Maple Grove, MN
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | rpm run up vs tail wheel staying down |
--> RV-List message posted by: "Chuck Jensen" <cjensen@dts9000.com>
Wow, what a party-pooper. Ruining a good story with facts and figures.
Next thing we know, you'll want to calculate peoples true TAS, not their
fanciful wishing speed. Have a good new year and may it always be CAVU
for you.
Thanks,
Chuck Jensen
Diversified Technologies
2680 Westcott Blvd
Knoxville, TN 37931
Phn: 865-539-9000 x25
Cell: 865-406-9001
Fax: 865-539-9001
cjensen@dts9000.com
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Alex Peterson
Subject: RE: RV-List: rpm run up vs tail wheel staying down
--> RV-List message posted by: "Alex Peterson"
<alexpeterson@earthlink.net>
> --> RV-List message posted by: "Tom & Cathy Ervin"
> --> <tcervin@valkyrie.net>
>
> My RV-6A with a 180 HP & constant speed prop will drag it's
> self along the pavement tires locked at anything above 1500 RPM!
>
>
> Tom in Ohio DO NOT ARCHIVE
Wow, is that correct? My same setup will take about 2350 rpm to move,
and
even then, it is not the tires sliding. It takes an alarming amount of
brake pedal pressure to hold it; you are probably sliding the brakes and
not
the tires. Put your feet way up on the top edge of the pedal, so that
you
aren't overstressing the rudder pedal weldments. When I have had the
prop
dynamically balanced, I usually do it at 2200 rpm, and my leg muscles
can
feel it the next day.
If the coefficient of friction between the tires and the pavement is
around
.8, and the mains are holding about 1200 pounds, for example, it would
take
about 1000 pounds of thrust to drag the tires. Ain't happening. I did
a
runup at 1400 rpm on snow a few weeks ago, and didn't slide.
Alex Peterson
RV6-A N66AP 702 hours
Maple Grove, MN
Message 5
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: "Chuck Jensen" <cjensen@dts9000.com>
Charlie,
Your observation that 9 out of 10 people prefer the sound of a V-8 over
a 4cyl Singer-Sewer, the same as a Harley over a Yamahauler or a
Lcyosarous over a SubbieSonicBoomer is spot on. You have hit upon a
little known fact that the big thumpers happen to match the natural
harmonic resonance frequency of the Cochlea fluid of the inner ear.
This synchronous harmony results in an inner calming effect, much as the
'Mmmmmm' proposed by the Swami Maitreyananda Saraswati of the National
Yoga Council of India.
By comparison, the high pitched whine of 2 cycle or other high rev
engines upsets this sensitive balance, causing a sharp pain the area of
the sphincter muscle.
Cliff Clavin
Do Not Archive
Can you quantify the noise? Have both been measured with a C-weighting
sound level meter? Was it engine noise or prop? I'm a fan of Mazda
rotary conversions, but I really hate the way they sound. Sound level
measurements have been made on several rotary powered a/c & similar Lyc
powered planes, & in many cases the rotary planes are no louder (&
sometimes quieter) than the Lycs. *But* all are subjectively more
offensive, due to the sharp edged exhaust pulses.
Here's the point: Pretty much everybody in the US & old enough to
remember prefers the sound of a big V8 in a car to a little 4cyl. How
many of us drive a V8 these days?
Reasons for the answer to the above question, and their implications,
are left as an excercise for the reader....;-)
Charlie
Message 6
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re riding moer to use as tug |
--> RV-List message posted by: "charles heathco" <cheathco@junct.com>
That setup would work ok going forward, but dont think you could do anygood backing
it in, unles you were perfectly lined up and kept nose wheel absolutly straight,
but if you riged the arm on the front, I think maybe it would work. Charlie
heathco
Message 7
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: "Tracy Crook" <lors01@msn.com>
All true (except for the sphincter part), but I'm happy to report that after 1500+
hours, the sound of the Mazda rotary has morphed into music to my ears : )
My favorite sounding exhaust system so far was a relatively small bore collector
(2") with a 'cherry bomb' style glass pack muffler. Reminded me of driving
the BMW Z3 through a tunnel. Absolute sonic poetry! Unfortunately the muffler
only lasted a few hours before puking the packing out the tail pipe.
The 20B 3 rotor powered (~300 HP) RV-8 is almost done. Anxiously awaiting first
engine start since I have not heard a 3 rotor run before. I'm hoping it sounds
50% better than the 2 rotor.
Tracy Crook
--> RV-List message posted by: "Chuck Jensen" <cjensen@dts9000.com<mailto:cjensen@dts9000.com>>
Charlie,
Your observation that 9 out of 10 people prefer the sound of a V-8 over
a 4cyl Singer-Sewer, the same as a Harley over a Yamahauler or a
Lcyosarous over a SubbieSonicBoomer is spot on. You have hit upon a
little known fact that the big thumpers happen to match the natural
harmonic resonance frequency of the Cochlea fluid of the inner ear.
This synchronous harmony results in an inner calming effect, much as the
'Mmmmmm' proposed by the Swami Maitreyananda Saraswati of the National
Yoga Council of India.
By comparison, the high pitched whine of 2 cycle or other high rev
engines upsets this sensitive balance, causing a sharp pain the area of
the sphincter muscle.
Cliff Clavin
Do Not Archive
Can you quantify the noise? Have both been measured with a C-weighting
sound level meter? Was it engine noise or prop? I'm a fan of Mazda
rotary conversions, but I really hate the way they sound. Sound level
measurements have been made on several rotary powered a/c & similar Lyc
powered planes, & in many cases the rotary planes are no louder (&
sometimes quieter) than the Lycs. *But* all are subjectively more
offensive, due to the sharp edged exhaust pulses.
Here's the point: Pretty much everybody in the US & old enough to
remember prefers the sound of a big V8 in a car to a little 4cyl. How
many of us drive a V8 these days?
Reasons for the answer to the above question, and their implications,
are left as an excercise for the reader....;-)
Charlie
Message 8
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
--> RV-List message posted by: Mickey Coggins <mick-matronics@rv8.ch>
My PSS AOA has audio that alerts you when you are approaching
the critical angle of attack. (Angle-Angle-Push)
I'm also planning to mount the light panel on top of the
glare shield, just like on the F-18. I'll mount it a bit
to the left, to leave room for the HUD. :-)
Happy new year!
Mickey
> Excellent point about looking down.
>
> The solution is a HUD - Which I expect we will see in the near future.
>
> In the mean time PSS's AOA has a mount for their Pro model the is placed
> above the glare shield in your pheriphal vision and timed into your headset
> jack. You have all the info without looking down. We have been flying with
> it since 2001 and it works great.
>
>
>>Todd - that is really helpful and confirms the way I was leaning. I think I
>>will save my money and perhaps implement the D10A - or similar - approach
>>since it costs little extra. I wonder how the sound on that works?????
>>
>>I am building a -4, and had a D10 on a -9A. The reality was that I did not
>>use the AoA on the -9A, since I did not have time to look down, since I
>>operate out of a very short strip!
>
--
Mickey Coggins
http://www.rv8.ch/
#82007 finishing
do not archive
Message 9
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | rpm run up vs tail wheel staying down |
--> RV-List message posted by: "Trevor" <davist@xsinet.co.za>
----- Original Message -----
From: "lucky" <luckymacy@comcast.net>
<vansairforce@yahoogroups.com>; "RV8 List" <RV-8@yahoogroups.com>
Subject: RV-List: rpm run up vs tail wheel staying down
> --> RV-List message posted by: luckymacy@comcast.net (lucky)
>
> When running up to about 2200 rpm, my RV8 tail lifts off of the ground. I
have an angle valved, 200 hp engine with hartzell CS prop. 27 degrees up
elevator throw.
>
> Does that sound right?
>
>
Lucky,
You're sure living up to your name seeing as tho you haven't nosed over yet!
Be very VERY carefull, especially if the a/c is not directly into wind. Ask
me! And I only have 160 horses! I ran my -6 up to 2100 with a wind from
the quarter. I remember feeling some buffeting on the fuselage as the wind
picked up. Next thing I was eating tarmac. I felt the tail come up and
chopped the engine-but too late. Stick was right back and brakes on (in
retrospect I should maybe have let go on the brakes and let the a/c shoot
into the grass...). Fortunately as the prop hit the a/c bounced back onto
its tail. Cost me a new prop and engine inspection. Now I use 1700 rpm as
max!
Trevor
Message 10
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Re riding moer to use as tug |
--> RV-List message posted by: "Tim Bryan" <flyrv6@bryantechnology.com>
We do it all the time with a cherokee. It is tricky but with a little
practice you can get pretty proficient at it.
Tim
-------Original Message-------
From: charles heathco
Subject: RV-List: Re riding moer to use as tug
--> RV-List message posted by: "charles heathco" <cheathco@junct.com>
That setup would work ok going forward, but dont think you could do anygood
backing it in, unles you were perfectly lined up and kept nose wheel
absolutly straight, but if you riged the arm on the front, I think maybe it
would work. Charlie heathco
Message 11
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: Vanremog@aol.com
In a message dated 12/31/2005 5:36:40 A.M. Pacific Standard Time,
cjensen@dts9000.com writes:
Here's the point: Pretty much everybody in the US & old enough to
remember prefers the sound of a big V8 in a car to a little 4cyl. How
many of us drive a V8 these days?
Me, me!! And I also do the yoga chants.. ohmadepadme.....and I read Zen and
the Art of Motorcycle Maintenance... Just an old fashioned boy.
Everyone have a good new year. Do not archive.
GV (RV-6A N1GV O-360-A1A, C/S, Flying 771hrs, BMW X-5 4.4L Silicon Valley,
CA)
Message 12
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: "JOHN STARN" <jhstarn@verizon.net>
Lets see now.........
1998 Dodge Ram 1500.....................318 V8
2002 Honda VT1100C......................V-Twin
2006 Chrysler 300C...........................5.7 V8 HEMI
OH, yea..HRII......................................IO-540 Lyc.
Sorry no 4cyl anything. Down shift, hit the gas & I expect
and get something other than just more noise.
Going up a long steep hill ?,
Cajon Pass, Baker grade, Grapevine......
"Yep. its got a Hemi."
KABONG Do Not Archive
----- Original Message -----
From: <Vanremog@aol.com>
Subject: Re: RV-List: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV -
WTF
>
> Here's the point: Pretty much everybody in the US & old enough to
> remember prefers the sound of a big V8 in a car to a little 4cyl. How
> many of us drive a V8 these days?
>
>
> Me, me!! And I also do the yoga chants.. ohmadepadme.....and I read Zen
> and
> the Art of Motorcycle Maintenance... Just an old fashioned boy.
>
>
> Everyone have a good new year. Do not archive.
>
>
> GV (RV-6A N1GV O-360-A1A, C/S, Flying 771hrs, BMW X-5 4.4L Silicon
> Valley,
> CA)
Message 13
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Towbar powered with corless drill |
--> RV-List message posted by: "Amit Dagan" <amitdagan@hotmail.com>
For $20 you can get the plans to build one:
http://www.hciaviation.com/prod-towbar-a.shtml
Build your own towbar and save hundreds of dollars. Use your 110 volt or
battery 3/8 or larger drill to power this plans-built towbar. It works with
tailwheel airplanes. Drawings for an adapter for nosewheel airplanes are
included. You will need the ability to saw, weld, and drill rectangular and
round 16 gauge steel tubing. Included in $20 purchase price are: detailed
plans, construction procedure, and a list of necessary parts and materials.
Message 14
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Re riding moer to use as tug |
--> RV-List message posted by: "Mark" <2eyedocs@comcast.net>
Another option is a fixer upper golf cart. A pretty nice one can be had for
~$500. You can attach a tow bar to the front of the cart. I used this
setup with a C182 for a while, and after you learn that when you turn the
wheel right, the tow bar goes left, which makes the wheel go right, which
makes the tail go left, etc., then it's easy! Another nice feature with the
golf cart is that it makes for good transportation arounnd the airport for
bathroom runs.
Mark
----- Original Message -----
From: "charles heathco" <cheathco@junct.com>
Subject: RV-List: Re riding moer to use as tug
> --> RV-List message posted by: "charles heathco" <cheathco@junct.com>
>
> That setup would work ok going forward, but dont think you could do
> anygood backing it in, unles you were perfectly lined up and kept nose
> wheel absolutly straight, but if you riged the arm on the front, I think
> maybe it would work. Charlie heathco
>
>
>
Message 15
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Rv8 Flap Actuator Cover Template |
--> RV-List message posted by: "Doug Bell" <DBell@ManisteeNational.com>
Fellow builders and fliers,
With all the talk lately about the flap actuator cover..my pops made up a
few options and finalized on one which we installed on our 8 and it looks
very nice. If anyone would like a template emailed to them, Dad made up a
set of drawings that I can email. You can at least take a look and go from
there but he asked me to let everyone know its available.
Just email me direct and I can send them back to you.
Doug Bell
N266WB
Manistee, MI
231-398-9106
Message 16
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
--> RV-List message posted by: "Dan Beadle" <Dan.Beadle@hq.InclineSoftworks.com>
What are you doing for a pitot tube to get the dual feeds (90 degrees
apart)? Do you have an anti-ice solution?
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Ed Anderson
Subject: Re: RV-List: AoA
--> RV-List message posted by: "Ed Anderson" <eanderson@carolina.rr.com>
> I am a bit puzzled by your statement that the PSS AOA system directly
> measures AOA. I had always understood that it used pressure ports on
> the top and bottom of the wing, and inferred the AOA by measuring the
> pressures at these ports, rather than directly measuring the angle of
> the incoming air by a vane. Have I misunderstood how it works?
>
> do not archive
>
> Kevin Horton RV-8 (finishing kit)
> Ottawa, Canada
> http://www.kilohotel.com/rv8
>
>
I agree, Kevin. An article in Sport Aviation May 1998 showed that the
two
wing pressure port sources work based on the concept of a pressure
coefficient Cp = (P1-P2)/(Pt-Ps) or the ratio of the pressure difference
of
the two ports to the dynamic pressure (Pt-Ps).
I worked some of the math theory on several AOA approaches. The vane
method or the probe with two ports, both give a "direct" indication of
angle of attack. If the airspeed is a constant then any variation
will be
directly related to angle of attack.
I worked out the math on the probe approach in detail (as I am building
an
AOA based on that approach). I found that the difference between the
dynamic pressure component in the two ports of the probe is a direct
indicator of the Angle of attack. These two ports are normally 90 degs
apart (but, that is not a requirement - just makes the math easier
{:>)).
Since (as you know) the pressure is the force(vector) acting normal to
an
area, then the dynamic pressure component of interest is the force
acting
normal to the port openings in the probe. The total dynamic pressure
is
common to both ports , however, the dynamic pressure component normal
to
the plane of the port opening differs based on the angle of attack.
That
difference is a direct results of the angle of the relative wind to the
two
ports.
Since the probe is fixed to the wing of the aircraft we are in effect
measuring the angle of attack of the wing.
The end result of my math analysis is that Pressure difference
(between the two ports) = q(Sin(angle) - Cos(angle)) assuming the plane
of
the two ports are 90 degrees apart.
So at a constant airspeed (V) the magnitude of dynamic pressure (q =
1/2pV
2) remains constant, therefore, any pressure difference variation
(between the two ports) is dependent only on the variation in the angle
of
attack. I then calculated the expected magnitude of the force
(pressure)
seen by the ports inorder to determine the range my pressure sensor
would
need to operate over.
Even the so-call "Reserve Lift" method is actually indicating the angle
of
attack and inferring "Lift". I am using a differential pressure sensor
to
measure the difference in dynamic pressure component and using a
microchip
to interpret, display the traditional LED ladder and can set alarms
(visual
and audio) before the stall (actually at any point).
That is my take on the different approaches. FWIW
Ed Anderson
Matthews, NC
eanderson@carolina.rr.com
Message 17
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Towbar powered with cordless drill |
--> RV-List message posted by: "Ralph E. Capen" <recapen@earthlink.net>
**SNIP**
> For $20 you can get the plans to build one:
>
> http://www.hciaviation.com/prod-towbar-a.shtml
>
Anyone that gives this a shot - I think the list would like to see a report
on how easy to build, suitability for TW/NW etc
Thanks
Message 18
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
--> RV-List message posted by: gert <gert.v@sbcglobal.net>
there was an article in Sport aviation, as far back as january 1979, on
how to make a 2 port angle of attack indicator out of an old airspeed
indicator.
Dan Beadle wrote:
>--> RV-List message posted by: "Dan Beadle" <Dan.Beadle@hq.InclineSoftworks.com>
>
>What are you doing for a pitot tube to get the dual feeds (90 degrees
>apart)? Do you have an anti-ice solution?
>
>-----Original Message-----
>From: owner-rv-list-server@matronics.com
>[mailto:owner-rv-list-server@matronics.com] On Behalf Of Ed Anderson
>To: rv-list@matronics.com
>Subject: Re: RV-List: AoA
>
>--> RV-List message posted by: "Ed Anderson" <eanderson@carolina.rr.com>
>
>
>
Message 19
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: David Leonard <wdleonard@gmail.com>
On 12/31/05, JOHN STARN <jhstarn@verizon.net> wrote:
>
> --> RV-List message posted by: "JOHN STARN" <jhstarn@verizon.net>
>
> Lets see now.........
> 1998 Dodge Ram 1500.....................318 V8
> 2002 Honda VT1100C......................V-Twin
> 2006 Chrysler 300C...........................5.7 V8 HEMI
> OH, yea..HRII......................................IO-540 Lyc.
>
> Sorry no 4cyl anything. Down shift, hit the gas & I expect
> and get something other than just more noise.
> Going up a long steep hill ?,
> Cajon Pass, Baker grade, Grapevine......
> "Yep. its got a Hemi."
> KABONG Do Not Archive
This is a very common sentiment. Like any red blooded American male I fully
agree. The sound of those big engines, especially at idle, sounds so much
more manly than the high-revving alternatives.
But when was the last time a Harley ever won a real motorcycle race? Those
bikes are notorious for being overpriced maintenance nightmares. Look even
at the big war-bird engines of WWII - the pent ultimate in cool sound. They
have a TBO of what? 100 hrs or something like that. I would love to own a
P-51, but I know I don't have that much discretionary money.
I also like to rent Harleys every now and then for the nostalgia, but I
would never own one... too expensive and not worth the money. I guess I
could say the same thing about lycoming powered aircraft. :-)
Choose your engine based on it's sound if you want - not a totally
unreasonable selection criteria. But a powerful high-revving engine sounds
manly as well. :-)
--
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a/vp4skydoc/index.html
Message 20
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: [RV-8] Rv8 Flap Actuator Cover Template |
0.19 MISSING_HEADERS Missing To: header
--> RV-List message posted by: luckymacy@comcast.net (lucky)
Hi Doug, I'd like to look it over.
thanks,
lucky
-------------- Original message --------------
From: "Doug Bell" <dbell@manisteenational.com>
Fellow builders and fliers,
With all the talk lately about the flap actuator cover..my pops made up a
few options and finalized on one which we installed on our 8 and it looks
very nice. If anyone would like a template emailed to them, Dad made up a
set of drawings that I can email. You can at least take a look and go from
there but he asked me to let everyone know its available.
Just email me direct and I can send them back to you.
Doug Bell
N266WB
Manistee, MI
231-398-9106
[Non-text portions of this message have been removed]
SPONSORED LINKS Aviation school Aviation training Aviation training school
Aviation training schools Aviation Experimental design
Visit your group "RV-8" on the web.
To unsubscribe from this group, send an email to:
RV-8-unsubscribe@yahoogroups.com
Hi Doug, I'd like to look it over.
thanks,
lucky
-------------- Original message --------------
From: "Doug Bell" dbell@manisteenational.com
<TT>Fellow builders and fliers,
With all the talk lately about the flap actuator cover..my pops made up a
few options and finalized on one which we installed on our 8 and it looks
very nice. If anyone would like a template emailed to them, Dad made up a
set of drawings that I can email. You can at least take a look and go from
there but he asked me to let everyone know its available.
Just email me direct and I can send them back to you.
Doug Bell
N266WB
Manistee, MI
231-398-9106
[Non-text portions of this message have been removed]
</TT><!-- |**|begin egp html banner|**| -->
<TT>SPONSORED LINKS</TT>
<TT>Aviation school</TT>
<TT>Aviation training</TT>
<TT>Aviation training school</TT>
<TT>Aviation training schools</TT>
<TT>Aviation</TT>
<TT>Experimental design</TT> <!-- |**|end egp html banner|**| --><!-- |**|begin
egp html banner|**| -->
<TT>
Visit your group "RV-8" on the web.
</TT> <TT>
To unsubscribe from this group, send an email to:
RV-8-unsubscribe@yahoogroups.com
</TT> <TT>
<!-- |**|end egp html banner|**| -->
Message 21
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: "Fly n Low" <flynlow@usaviator.net>
Alright, alright, enough already. I wonder what a round engine on a RV would
look like? God knows it would sound good!
Remember: "If God had meant man to fly with a flat motor... Pratt and
Whitney would have built one!"
Ahhh those were the days my friend... "Guts and Struts"
Bud Silvers
RV 8 finishing with IO-360-A1A
PS Have a happy new year everyone.
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com]On Behalf Of David Leonard
Subject: Re: RV-List: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a
RV - WTF
--> RV-List message posted by: David Leonard <wdleonard@gmail.com>
On 12/31/05, JOHN STARN <jhstarn@verizon.net> wrote:
>
> --> RV-List message posted by: "JOHN STARN" <jhstarn@verizon.net>
>
> Lets see now.........
> 1998 Dodge Ram 1500.....................318 V8
> 2002 Honda VT1100C......................V-Twin
> 2006 Chrysler 300C...........................5.7 V8 HEMI
> OH, yea..HRII......................................IO-540 Lyc.
>
> Sorry no 4cyl anything. Down shift, hit the gas & I expect
> and get something other than just more noise.
> Going up a long steep hill ?,
> Cajon Pass, Baker grade, Grapevine......
> "Yep. its got a Hemi."
> KABONG Do Not Archive
This is a very common sentiment. Like any red blooded American male I fully
agree. The sound of those big engines, especially at idle, sounds so much
more manly than the high-revving alternatives.
But when was the last time a Harley ever won a real motorcycle race? Those
bikes are notorious for being overpriced maintenance nightmares. Look even
at the big war-bird engines of WWII - the pent ultimate in cool sound. They
have a TBO of what? 100 hrs or something like that. I would love to own a
P-51, but I know I don't have that much discretionary money.
I also like to rent Harleys every now and then for the nostalgia, but I
would never own one... too expensive and not worth the money. I guess I
could say the same thing about lycoming powered aircraft. :-)
Choose your engine based on it's sound if you want - not a totally
unreasonable selection criteria. But a powerful high-revving engine sounds
manly as well. :-)
--
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a/vp4skydoc/index.html
Message 22
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: "Jim Jewell" <jjewell@telus.net>
----- Original Message -----
From: "David Leonard" <wdleonard@gmail.com>
Subject: Re: RV-List: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV -
WTF
> --> RV-List message posted by: David Leonard <wdleonard@gmail.com>
>
> On 12/31/05, JOHN STARN <jhstarn@verizon.net> wrote:
>>
>> --> RV-List message posted by: "JOHN STARN" <jhstarn@verizon.net>
>>
>> Lets see now.........
>> 1998 Dodge Ram 1500.....................318 V8
>> 2002 Honda VT1100C......................V-Twin
>> 2006 Chrysler 300C...........................5.7 V8 HEMI
>> OH, yea..HRII......................................IO-540 Lyc.
>>
>> Sorry no 4cyl anything. Down shift, hit the gas & I expect
>> and get something other than just more noise.
>> Going up a long steep hill ?,
>> Cajon Pass, Baker grade, Grapevine......
>> "Yep. its got a Hemi."
>> KABONG Do Not Archive
>
>
> This is a very common sentiment. Like any red blooded American male I
> fully
> agree. The sound of those big engines, especially at idle, sounds so much
> more manly than the high-revving alternatives.
>
> But when was the last time a Harley ever won a real motorcycle race?
> Those
> bikes are notorious for being overpriced maintenance nightmares. Look
> even
> at the big war-bird engines of WWII - the pent ultimate in cool sound.
> They
> have a TBO of what? 100 hrs or something like that. I would love to own
> a
> P-51, but I know I don't have that much discretionary money.
>
> I also like to rent Harleys every now and then for the nostalgia, but I
> would never own one... too expensive and not worth the money. I guess I
> could say the same thing about lycoming powered aircraft. :-)
>
> Choose your engine based on it's sound if you want - not a totally
> unreasonable selection criteria. But a powerful high-revving engine
> sounds
> manly as well. :-)
>
> --
> Dave Leonard
> Turbo Rotary RV-6 N4VY
> http://members.aol.com/_ht_a/rotaryroster/index.html
> http://members.aol.com/_ht_a/vp4skydoc/index.html
>
>
>
Message 23
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: "Jim Jewell" <jjewell@telus.net>
Duck everybody ...INCOMING!!
Dave said:
"But when was the last time a Harley ever won a real motorcycle race? Those
bikes are notorious for being overpriced maintenance nightmares."
"I also like to rent Harleys every now and then for the nostalgia, but I
would never own one... too expensive and not worth the money. I guess I
could say the same thing about Lycoming powered aircraft. :-)"
Yikes!!
Feeling just a bit feisty Dave? or are you looking for your New Years
fireworks a bit early this year? Never mind the damn fire proof suit Dave,
just RUN AWAY NOW! {[;-)!
HAPPY NEW YEAR Folks ([g-)
Jim in Kelowna - painted and going together
----- Original Message -----
From: "David Leonard" <wdleonard@gmail.com>
Subject: Re: RV-List: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV -
WTF
> --> RV-List message posted by: David Leonard <wdleonard@gmail.com>
>
> On 12/31/05, JOHN STARN <jhstarn@verizon.net> wrote:
>>
>> --> RV-List message posted by: "JOHN STARN" <jhstarn@verizon.net>
>>
>> Lets see now.........
>> 1998 Dodge Ram 1500.....................318 V8
>> 2002 Honda VT1100C......................V-Twin
>> 2006 Chrysler 300C...........................5.7 V8 HEMI
>> OH, yea..HRII......................................IO-540 Lyc.
>>
>> Sorry no 4cyl anything. Down shift, hit the gas & I expect
>> and get something other than just more noise.
>> Going up a long steep hill ?,
>> Cajon Pass, Baker grade, Grapevine......
>> "Yep. its got a Hemi."
>> KABONG Do Not Archive
>
>
> This is a very common sentiment. Like any red blooded American male I
> fully
> agree. The sound of those big engines, especially at idle, sounds so much
> more manly than the high-revving alternatives.
>
> But when was the last time a Harley ever won a real motorcycle race?
> Those
> bikes are notorious for being overpriced maintenance nightmares. Look
> even
> at the big war-bird engines of WWII - the pent ultimate in cool sound.
> They
> have a TBO of what? 100 hrs or something like that. I would love to own
> a
> P-51, but I know I don't have that much discretionary money.
>
> I also like to rent Harleys every now and then for the nostalgia, but I
> would never own one... too expensive and not worth the money. I guess I
> could say the same thing about lycoming powered aircraft. :-)
>
> Choose your engine based on it's sound if you want - not a totally
> unreasonable selection criteria. But a powerful high-revving engine
> sounds
> manly as well. :-)
>
> --
> Dave Leonard
> Turbo Rotary RV-6 N4VY
> http://members.aol.com/_ht_a/rotaryroster/index.html
> http://members.aol.com/_ht_a/vp4skydoc/index.html
>
>
>
Message 24
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
--> RV-List message posted by: "Mannan J. Thomason" <mannanj@alltel.net>
At the risk of not being politically correct, I'd like to wish everyone on the
list a Happy and Prosperous New Year!
Mannan Thomason
RV-8 "light at the end of the tunnel"
Cowl, Baffle, gettin ready to hear the Lyco rumble
Message 25
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Lyco rumble & Subie was :Re: Subaru 6900 RPM in a RV - WTF |
--> RV-List message posted by: "Bob Perkinson" <bobperk@bellsouth.net>
But when was the last time a Harley ever won a real motorcycle race? Those
bikes are notorious for being overpriced maintenance nightmares.
--
Dave Leonard
Turbo Rotary RV-6 N4VY
I agree Dave. "I had rather ride a Honda than push a Harley"
Bob Perkinson
Hendersonville, TN.
RV9 N658RP Reserved
If nothing changes
Nothing changes
Do Not Archive
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|