Today's Message Index:
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1. 06:02 AM - Re: Lightning G3X Garmin Panel (Paul Whetham)
2. 06:09 PM - Re: Landing gear shimmy (Bill Strahan)
3. 06:15 PM - Re: Landing gear shimmy (Bill Strahan)
Message 1
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| Subject: | Re: Lightning G3X Garmin Panel |
Will do, thanks Ken.
Regards,
Paul
On 07/05/2012, at 11:02 AM, Ken Bailey wrote:
>
> My experience with the avionics tech at shelbyville was exemplary. I also had
non standard instrumentation, including some garmin products, integrated with
the GRT EFIS. They also offer some garmin options in their panels as well. I'd
call Nick or Mark, and not worry much about it.
>
> Ken Bailey
>
> On May 6, 2012, at 7:05 PM, Paul Whetham <p.whetham@bigpond.com> wrote:
>
>>
>> I am currently trying to sell my Piper Arrow and would then like to purchase
a Lightning and attend the Builder Assist programme at Shelbyville.
>> I got carried away last year and in anticipation of a sale purchased the Garmin
G3X Avionics which included:-
>> 2 x 370 GDU's and Tru Trak Auto pilot with auto trim. At that stage I was going
to purchase a TL3000 Sirius Aircraft (high wing).
>> My question is, Has anyone fitted the above avionics to a Lightning, what are
the potential problems re engine probes and the Jabiru 3300 engine,
>> and can the people at Shelbyville do the wiring for the above. Should I sell
the Garmin gear and go with what is designed for the Lightning?
>> Any help would be appreciated.
>> Thanks, Paul
>>
>>
>>
>>
>
>
>
>
>
Message 2
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| Subject: | Re: Landing gear shimmy |
Well, some possible egg on my face. :) First, I finished my stiffeners and instead
of adhesive, clamped them to the legs with 3 hose clamps.
I grabbed the gear leg prior, and yanked it back and forth on the ground. Then
clamped the stiffener on and did it again. It made an incredible difference.
I'll try to get some pictures up tomorrow.
I was excited to try them out with a high speed taxi, so I jumped in fired up.
From my hanger to the main taxiway at F69 is grass, and in that short section
I could immediately tell a difference. The plane just felt much more stable
on the grass without some of the wiggling, and back and forth springing of the
gear that occurs when you're slow taxiing over clumps of grass. Encouraging.
Did my high speed run and as I slowed to 20 or so, there was the same old shimmy.
Risking being told that the word doesn't mean, what I think it means...inconceivable!
A bit dejected, I taxied back and pulled in the hanger. Again I noted a much better
feel on the grass taxiway. My wife came out from the house and asked if
they worked, and as I was explaining what happened, I realized it was very unlikely
that the stiffeners would make NO difference at all! Hmmm. I had heard
the nose gear was pretty immune to shimmy, but maybe...
First I lifted the nose up and the noticed the nose wheel was free to flop back
and forth. Certainly no damping action there. And upon closer inspection I
could see dents in the aluminum at the edges of the slot that provides the limits
to rotation via the bolt and spacers. I don't slam the thing around, yet
the dents in the aluminum were substantial where the washers on the bolt were
digging into the aluminum at both extremes of rotation. I could easily envision
multiple stop to stop impacts creating the dents in the aluminum.
So perhaps I have the best grass-taxiing Lightning in existence, but that wasn't
really my goal. I'm going to rig up a video camera and do what I should have
done in the first place, video the gear and find out exactly what is causing
the shimmy. Then I'll fix it.
If it's not the main gear I may leave the stiffeners on anyway. Total weight of
stiffeners and clamps is 9 oz. I'll fly it up to a grass strip I frequent and
decide after I have the shimmy gone.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372595#372595
Message 3
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| Subject: | Re: Landing gear shimmy |
Here are the pics: One pic of the stiffeners, and a strip of rubber that I decided
to clamp between the stiffener and gear leg.
Next is a pic of the stiffener clamped in place
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372597#372597
Attachments:
http://forums.matronics.com//files/attachment_614.jpg
http://forums.matronics.com//files/attachment_2_204.jpg
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