Today's Message Index:
----------------------
1. 12:11 AM - Re: Re: To Magento - Or Not To Magento (John Cumins)
2. 05:58 AM - Re: Re: To Magento - Or Not To Magento (Bob Leffler)
3. 07:25 AM - Re: Re: To Magento - Or Not To Magento (Kelly McMullen)
4. 01:57 PM - Anybody need an "Extra Hand" in building their RV ?? (Garey Wittich)
5. 02:59 PM - Gretz GA-1000 Wiring (Sean Stephens)
6. 04:39 PM - Re: Gretz GA-1000 Wiring (Jim Berry)
7. 04:49 PM - Re: Gretz GA-1000 Wiring (Bob Leffler)
8. 04:57 PM - Re: Re: Gretz GA-1000 Wiring (Bob Leffler)
Message 1
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| Subject: | Re: To Magento - Or Not To Magento |
Bob
I will be going with the 3G system that's for sure. I am looking forward to
their demo at Oshkosh also.
John G. Cumins
40864 Emp almost complete winds kit sitting on the shelf
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Bob and Karen
Brown
Sent: Friday, April 09, 2010 9:18 PM
Subject: RE: RV10-List: Re: To Magento - Or Not To Magento
<bkbrown@minetfiber.com>
As I noted on my earlier post, if you'll contact Larry Vetterman, he'll give
you the rundown on his experiences running the G3 over two years. I'm
pretty sure he did a writeup on his test results and posted it on VAF. He
was a "beta tester" for G3 if I recall. I remember that a measurable
reduction in fuel burn at cruise was documented, and a "much smoother
engine"...but it's been two years since I read his writeup there. Larry
does 3 leg GPS runs on almost all of his tests (you can check out his
website for some other testing he's done on fairings and stuff), he'll have
that info. One thing he told me in person was that he could easily feel the
difference in power between having the G3 system turned off (running on
stock mags) and turning it on. By the way, the magnetos used with the G3
are stock, they only have a small hole drilled in them to run a wire, no
modifications to the operation or function of the magneto. I think I've
almost talked myself into buying it...
Bob Brown
40871
Do not archive
It would be even better if they were able to do a 3 leg GPS run with
G3 enabled, followed by one with it disabled, on stock magnetos, so we
could have a real world estimate of power difference.
Message 2
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| Subject: | Re: To Magento - Or Not To Magento |
Larry's write up can be found on his web site:
http://www.vettermanexhaust.com/
Here's the section about the G3:
Before I started the prop tests, I was very interested in the new electronic
ignition that I had seen on the web. www.g3ignition.com . I called Tom and
he agreed to install one on my 7A. I found the installation was simple for
even me as electricity and I just don't get along. I tell people that I am
so electrically challenged that I hire my neighbor to change my flashlight
batteries. Oh well, I would bet that some electronics guru can't weld
either. The hardest part of the installation was removing the Bendix mags.
and installing the post that hooks up the G3. Now after flying it almost 100
hours, here are the reasons that I really like the G3. #1. Easy to install,
even I could follow the wiring diagrams. 2. the system uses the existing
mags and if there is an electrical failure, the mags operate normally. 3.
the engine starts very well both hot and cold. 4. I can now run lean of peak
if desired whereas before my M1B, with standard mags balked at anything
beyond peak EGT. 5. I see a lower ghp with the G3 vs standard mags. 6. The
M1B engine is extremely smooth with the G3. 7. I used the expensive Champion
fine wire spark plugs(I had a set on the shelf) gapped to .021 however I
understand that an inexpensive automotive plug can also be used.
Aircraft RV-7A, IO-360 M1B 180HP standard air intake and standard crossover
system.
Test #1 Standard Mags vs. G3 ignition Hartzell Blended Airfoil prop. A
series of flights were made in this configuration and the data was compiled
and averaged. The flight data system was used for all of the following tests
as in all prior tests. The G3 is a type of system that is easily forgotten
and all it takes is to reach over and turn it off and see the difference in
smoothness.
DA 7500ft. MP 22.7 RPM 2400 OAT 45.1 GPH 9.1 IAS 166mph TAS 189mph EGT #1
1387 #2 1358 #3 1370 #4 1340. G3 ignition OFF
DA 7500ft MP 22.7 RPM 2400 OAT 45.1 GPH 8.9 IAS 168mph TAS 191mph EGT #1
1400 #2 1372 #3 1377 #4 1345. G3 ignition ON Note: The G3 will allow a
higher peak EGT which allows a fuel savings.
Tests were also conducted at 10,500DA and the important data shows 20.9 MP
2400RPM at 50 degrees rich of peak the IAS 158 TAS 186 9GPH while 50 degrees
lean of peak yields IAS 154 TAS 182 8GPH. G3 ignition on.
In every test conducted with both props, there is a definite engine
smoothness noted with the G3 on vs operating in the standard mag mode.
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Bob and Karen
Brown
Sent: Saturday, April 10, 2010 12:18 AM
Subject: RE: RV10-List: Re: To Magento - Or Not To Magento
<bkbrown@minetfiber.com>
As I noted on my earlier post, if you'll contact Larry Vetterman, he'll give
you the rundown on his experiences running the G3 over two years. I'm
pretty sure he did a writeup on his test results and posted it on VAF. He
was a "beta tester" for G3 if I recall. I remember that a measurable
reduction in fuel burn at cruise was documented, and a "much smoother
engine"...but it's been two years since I read his writeup there. Larry
does 3 leg GPS runs on almost all of his tests (you can check out his
website for some other testing he's done on fairings and stuff), he'll have
that info. One thing he told me in person was that he could easily feel the
difference in power between having the G3 system turned off (running on
stock mags) and turning it on. By the way, the magnetos used with the G3
are stock, they only have a small hole drilled in them to run a wire, no
modifications to the operation or function of the magneto. I think I've
almost talked myself into buying it...
Bob Brown
40871
Do not archive
Message 3
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| Subject: | Re: To Magento - Or Not To Magento |
Thanks for extracting that write-up Bob. Good info. Anyone know of
similar comparison for Lightspeed vs mags? Obviously not as easy to
compare since hardware has to be changed.
On Sat, Apr 10, 2010 at 6:00 AM, Bob Leffler <rv@thelefflers.com> wrote:
>
> Larry's write up can be found on his web site:
> http://www.vettermanexhaust.com/
>
> Here's the section about the G3:
>
>
Message 4
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| Subject: | Anybody need an "Extra Hand" in building their RV ?? |
Greetings:
I have time to help someone on their Project. I have completed building the RV-8A
empennage ( Acid etched, Alodined and Mil Epoxy Primed the interior skins
and assembled) and have run out of room to continue building. Have tools to help
someone on their Project. I am a retired electrical engineer and have designed
my own Electrical System for the RV. Also designed an "Pilot Aux Warning
System" that monitors Vans analog engine gauges and provides a Warning for -
"Low Fuel", "Hi Oil Temp", "Low Voltage", etc Spent many ours researching the
best way to do things on Matronics from other Builders. Hoped to use this info
on my Project, but ran out of room to build, thus hoping to share ideas and
help someone on their "Project".
Garey Wittich (CFI, MEI)
Santa Monica, CA
(310) 392-1682
Message 5
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| Subject: | Gretz GA-1000 Wiring |
Quick question regarding the four wires coming from the GA-1000 pitot.
The P+ and P- wires are marked, but I just wanted to verify that the two
smaller wires are the thermistor. The instructions don't specifically
say and the wires aren't marked.
Thanks,
-Sean
#40303 (back at it after a few years hiatus)
Message 6
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| Subject: | Re: Gretz GA-1000 Wiring |
Sean,
You are correct. Also, check your Gretz pitot for leaks before installing it in
your wing. It is a pita to discover a leak later on. Ask me how I know.
Jim Berry
40482
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=293780#293780
Message 7
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| Subject: | Gretz GA-1000 Wiring |
Your assumption is correct. Andrew has installation instructions on his web
site. http://www.angusaviation.com/
bob
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Sean Stephens
Sent: Saturday, April 10, 2010 5:59 PM
Subject: RV10-List: Gretz GA-1000 Wiring
Quick question regarding the four wires coming from the GA-1000 pitot.
The P+ and P- wires are marked, but I just wanted to verify that the two
smaller wires are the thermistor. The instructions don't specifically
say and the wires aren't marked.
Thanks,
-Sean
#40303 (back at it after a few years hiatus)
Message 8
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| Subject: | Re: Gretz GA-1000 Wiring |
Not only check for leaks, but proper operation. I had a thermistor that
had one lead shorted to ground. It worked well on the bench, when the pitot
body wasn't grounded. It got squirrelly when it was installed. It took
quite a bit of testing to find the root cause. The good news was Andrew was
prompt sending a replacement.
Bob
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Jim Berry
Sent: Saturday, April 10, 2010 7:39 PM
Subject: RV10-List: Re: Gretz GA-1000 Wiring
Sean,
You are correct. Also, check your Gretz pitot for leaks before installing it
in your wing. It is a pita to discover a leak later on. Ask me how I know.
Jim Berry
40482
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=293780#293780
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