Today's Message Index:
----------------------
1. 05:43 AM - Re: Replacement 4MB Memory Card for Garmin GX-50/55/60/65 GPSReplacement 4MB Memory Card for Garmin GX-50/55/60/65 GPS (jacklockamy)
2. 07:12 AM - Re: Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) (Karen and Robert Brown)
3. 07:49 AM - Re: Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) (Dan Checkoway)
4. 09:53 AM - Prince P-tip prop (sarg314)
5. 10:22 AM - CFI in AZ (Paul Besing)
6. 10:44 AM - Re: Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) (Dan Morrow)
7. 11:31 AM - Re: Anodized Panels (John DeCuir)
8. 12:02 PM - Re: Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) (Dan Checkoway)
9. 07:56 PM - sorted/searchable parts list for the -7? INNOCENT GLOBAL 0.0000 1.0000 -2.0210 (Charlie England)
10. 10:37 PM - Re: sorted/searchable parts list for the -7? INNOCENT GLOBAL 0.0000 1.0000 -2.0210 (Bob Perkinson)
Message 1
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Garmin GX-50/55/60/65 GPS
| Subject: | Re: Replacement 4MB Memory Card for Garmin GX-50/55/60/65 GPSReplacement |
4MB Memory Card for Garmin GX-50/55/60/65 GPS
--> RV-List message posted by: "jacklockamy" <jacklockamy@verizon.net> GPSReplacement
4MB Memory Card for Garmin GX-50/55/60/65 GPS
A buddy of mine has a Garmin 430 in his panel. I will take a look at his card
and do some research to see if there is an alternative/replacement card at 'sub-Garmin'
prices...
Jack Lockamy
Camarillo, CA
Message 2
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| Subject: | Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) |
--> RV-List message posted by: "Karen and Robert Brown" <bkbrown@ashcreekwireless.com>
Sorry to be late on a response here (work sucks, doesn't it?). I concur with some
of George's observations, and certainly the CAFE testing data give some performance
data to consider. I think you should have a personal visit with each
of the manufacturers of the electronic ignition systems before you purchase,
that's one of the benefits of building experimental aircraft. The P-Mag/E-Mag
system is certainly the new kid on the block and is still evolving. Latest
information from Brad Dement at Emagair (P-Mag manufacturer) indicates the newest
version of the P-Mag has a programmable input lead that allows one to implement
whatever latest update which may exist. My P-Mag, (the earlier version)
does not have that capability. Additionally, the Lightspeed system knows where
the crank is once per revolution. In between that position, it imputes the
position of the crank. The P-Mag/E-Mag system knows where the crank is at all
times and can be programmed more precisely because of this.
As far as performance, just as in building a top fuel dragster, you will have to
make some tradeoffs if you want every ounce of power. Your selection of ignition
systems should be made based on YOUR design criteria, not someone elses.
If your number one design criteria is more performance, it doesn't make sense
to stop with the ignition system if you are not doing all the other things in
your attempt to approach higher mach numbers.
My advice is to talk to several people who are running these systems and always
compare apples to apples. Along the way, I encourage you not to make a choice
of any one ignition system based on what their competitor has to say about it.
Talk to all of them in person, develop a relationship and let them give you
their views. Visit their websites. Take all of that information, mesh it with
your design goals, throw in a little gut instinct and get out your wallet.
Just as in being a pilot, YOU need to be making the decision for YOUR reasons.
Bob
RV7A - Fairings/Wheel pants
Message 3
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| Subject: | Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) |
--> RV-List message posted by: "Dan Checkoway" <dan@rvproject.com>
> Additionally, the Lightspeed system knows where the crank
> is once per revolution. In between that position, it imputes the
> position of the crank. The P-Mag/E-Mag system knows wher
> the crank is at all times and can be programmed more precisely
> because of this.
That's some good marketing mumbo jumbo. ;-) Sure, I suppose at IDLE or
extremely slow engine speeds the system would benefit from having finer
granularity. Lightspeed has two magnets in the flywheel, at least on the
crank position sensor that uses flywheel magnets. Knowing where the crank
is twice per revolution, at anything over idle speed, is not exactly rocket
science. At 2400 RPM, that's 4800 magnet passes per minute or 80 passes per
second. Maybe not the extremely fine granularity that other sensors would
provide, but is it really necessary, when all you're doing is a simple
lookup map between engine speed and manifold pressure?
Just playing devil's advocate.
do not archive
)_( Dan
RV-7 N714D (833 hours w/Lightspeed)
http://www.rvproject.com
Message 4
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| Subject: | Prince P-tip prop |
--> RV-List message posted by: sarg314 <sarg314@comcast.net>
Is any one on the list actually flying behind a Prince P-tip carbon
fiber+wood prop for 180 HP? I believe it's a 68" prop with about 78"
pitch.
I have an 83" Pitch sensenich prop for 180HP still in the box which I am
considering selling to one of my fellow listers (it was purchased
early-on when they were recommending 83" rather than 85"). This
re-opens the prop question for me. I talked with Lonnie Prince
yesterday and he tells a pretty good story about his prop. The archives
don't contain much about the prop, but what's there is good.
Do people with light wood props have any C.G. advantages or
disadvantages compared to a heavy aluminum prop? I saw one reference
that implied less weight on the nose decreased luggage carrying capacity.
Thanks, for any info.
--
Tom Sargent, RV-6A, Engine.
Message 5
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--> RV-List message posted by: Paul Besing <pbesing@yahoo.com>
Looking for CFI with time in RV-4 in Arizona. Anyone
know anyone?
Thanks.
Paul Besing
do not archive
Message 6
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| Subject: | Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) |
--> RV-List message posted by: "Dan Morrow" <DanFM01@butter.toast.net>
The E-Mag people promote their system as avoiding the problems with kickback
that can occur
with other electronic ignition systems when starting with a weak battery.
In that situation the crank
may rotate with a herky-jerky motion or even stall before TDC and start
rotating backward. If the
ignition fires in that situation it can break the starter. The E-Mag people
say their system can detect
iregular movements of the crank and suppress firing of the ignition. The
Sky-Tec company gives a
warranty extension on their starters specifically for the E-Mag ignition.
See emagair.com for details.
----- Original Message -----
From: "Dan Checkoway" <dan@rvproject.com>
Sent: Friday, March 10, 2006 7:45 AM
Subject: Re: RV-List: Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs)
> --> RV-List message posted by: "Dan Checkoway" <dan@rvproject.com>
>
>> Additionally, the Lightspeed system knows where the crank
>> is once per revolution. In between that position, it imputes the
>> position of the crank. The P-Mag/E-Mag system knows wher
>> the crank is at all times and can be programmed more precisely
>> because of this.
>
> That's some good marketing mumbo jumbo. ;-) Sure, I suppose at IDLE or
> extremely slow engine speeds the system would benefit from having finer
> granularity. Lightspeed has two magnets in the flywheel, at least on the
> crank position sensor that uses flywheel magnets. Knowing where the crank
> is twice per revolution, at anything over idle speed, is not exactly
> rocket
> science. At 2400 RPM, that's 4800 magnet passes per minute or 80 passes
> per
> second. Maybe not the extremely fine granularity that other sensors would
> provide, but is it really necessary, when all you're doing is a simple
> lookup map between engine speed and manifold pressure?
>
> Just playing devil's advocate.
>
> do not archive
> )_( Dan
> RV-7 N714D (833 hours w/Lightspeed)
> http://www.rvproject.com
>
>
> --
>
>
Message 7
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| Subject: | Re: Anodized Panels |
--> RV-List message posted by: John DeCuir <jadecuir@comcast.net>
I used to work for an Aerospace machine shop that had numerous parts
Anodized by FAA approved vendors. Type I (chromic) anodize is very thin
, maybe .0002", penetration and buildup. It would fade very quickly if
exposed to UV light. Type II (sulfuric) anodize can be applied to
thickness' approaching .0010", and if dyed properly, is quite resistant
to fading, especially black. Type III (hard, sulfuric) anodize can be
as thick as .0040", but the dye does not penetrate that deep. We made
housings for a company that built 90 degree drill heads and air-drives
for aerospace builders, and they wanted Type III, .0020-0030" thick,
black. I believe they would resist fading quite well, and also stand up
to rough handling without much wear.
Keep in mind that if you go this route, you have to compensate for
the buildup on all your dimensions that matter. A .250" dia. hole would
shrink by the thickness of the anodize ( e.g., .0020 thick = .001
penetration and .001 buildup = .248"dia). All your holes, cutouts and
countersink diameters should be increased accordingly. Burrs and sharp
edges must be removed and rounded prior to treatment, or they get
knife-sharp and are prone to chipping. When you take it to the shop,
give them a sample piece of known dimension, like a cylinder or small
sheet (leftover from cutout?), so they can measure periodically during
processing. Use a certified shop, and the results will be better than
some shop that does decorative work only. If you don't need
certification to MIL-A-8625, the price goes down.
John DeCuir
RV-4, N204CP (670 hrs)
SNS, CA
Message 8
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| Subject: | Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs) |
--> RV-List message posted by: "Dan Checkoway" <dan@rvproject.com>
Ah. I can definitely see the advantage of granularity during startup. Once
it's running I wouldn't think it makes a difference, but I have (on rare
occasion) seen my Lightspeed system fire back like you mentioned after a
failed start.
)_( Dan
RV-7 N714D
http://www.rvproject.com
----- Original Message -----
From: "Dan Morrow" <DanFM01@butter.toast.net>
Sent: Friday, March 10, 2006 10:43 AM
Subject: Re: RV-List: Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs)
> --> RV-List message posted by: "Dan Morrow" <DanFM01@butter.toast.net>
>
> The E-Mag people promote their system as avoiding the problems with
> kickback
> that can occur
> with other electronic ignition systems when starting with a weak battery.
> In that situation the crank
> may rotate with a herky-jerky motion or even stall before TDC and start
> rotating backward. If the
> ignition fires in that situation it can break the starter. The E-Mag
> people
> say their system can detect
> iregular movements of the crank and suppress firing of the ignition. The
> Sky-Tec company gives a
> warranty extension on their starters specifically for the E-Mag ignition.
> See emagair.com for details.
>
> ----- Original Message -----
> From: "Dan Checkoway" <dan@rvproject.com>
> To: <rv-list@matronics.com>
> Sent: Friday, March 10, 2006 7:45 AM
> Subject: Re: RV-List: Re: E-mag/P-Mag Please Explain! (auto vs A/C plugs)
>
>
>> --> RV-List message posted by: "Dan Checkoway" <dan@rvproject.com>
>>
>>> Additionally, the Lightspeed system knows where the crank
>>> is once per revolution. In between that position, it imputes the
>>> position of the crank. The P-Mag/E-Mag system knows wher
>>> the crank is at all times and can be programmed more precisely
>>> because of this.
>>
>> That's some good marketing mumbo jumbo. ;-) Sure, I suppose at IDLE or
>> extremely slow engine speeds the system would benefit from having finer
>> granularity. Lightspeed has two magnets in the flywheel, at least on the
>> crank position sensor that uses flywheel magnets. Knowing where the
>> crank
>> is twice per revolution, at anything over idle speed, is not exactly
>> rocket
>> science. At 2400 RPM, that's 4800 magnet passes per minute or 80 passes
>> per
>> second. Maybe not the extremely fine granularity that other sensors
>> would
>> provide, but is it really necessary, when all you're doing is a simple
>> lookup map between engine speed and manifold pressure?
>>
>> Just playing devil's advocate.
>>
>> do not archive
>> )_( Dan
>> RV-7 N714D (833 hours w/Lightspeed)
>> http://www.rvproject.com
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> --
>>
>>
>
>
>
Message 9
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| Subject: | sorted/searchable parts list for the -7? INNOCENT GLOBAL 0.0000 |
1.0000 -2.0210
--> RV-List message posted by: Charlie England <ceengland@bellsouth.net>
Hi guys,
I have a vague memory of someone offering a parts list in an orderly
format (excel?) but all I can find in the archives back through 2000 is
mention of one for an -8.
Has anyone loaded one for the -7 into a searchable/sortable list?
Thanks,
Charlie
(fuselage inventory commencing)
Message 10
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| Subject: | sorted/searchable parts list for the -7? INNOCENT GLOBAL |
0.0000 1.0000 -2.0210
--> RV-List message posted by: "Bob Perkinson" <bobperk@bellsouth.net>
Charlie,
I just bit the bullet and Hand entered the -9 Fuselage parts list in an
Excell spread sheet. If you were building a -9 I would send you what I
have.
Bob Perkinson
Hendersonville, TN.
Hi guys,
I have a vague memory of someone offering a parts list in an orderly
format (excel?) but all I can find in the archives back through 2000 is
mention of one for an -8.
Has anyone loaded one for the -7 into a searchable/sortable list?
Thanks,
Charlie
(fuselage inventory commencing)
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