Today's Message Index:
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1. 05:02 AM - Landing Gear Shimmy on RV8A (Ian Brown)
2. 07:53 AM - Re: Landing Gear Shimmy on RV8a (Robin Marks)
Message 1
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| Subject: | Landing Gear Shimmy on RV8A |
Looking at your video, that very slight hesitation at the beginning, I'd say
your bearings are too tight. Compare with the nose wheel video at
http://www.eaa538.org/images/nosegear.wmv
Ian Brown
Message 2
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| Subject: | Re: Landing Gear Shimmy on RV8a |
Greg, as far as mounting camera I use the suction mount plus safety wire to
screws with a sandwich of washers to protect paint. So far suction has hel
d well.
Robin
Sent from the new iPad
On Nov 7, 2012, at 7:49 AM, "mr.gsun@gmail.com<mailto:mr.gsun@gmail.com>" <
mr.gsun@gmail.com<mailto:mr.gsun@gmail.com>> wrote:
My thought when I saw your video was that something is loose. Did you jac
k it up and really wiggle everything good? I run 35-37 psI and have a smal
l amount of shimmy sometimes when increasing taxi speed. If I touch the br
akes, it goes away and all is well.
I found that lower pressure helps my landings, eliminates shimmy but rubs o
n the wheel pants on touchdown. Rubbing on the sidewalls of my expensive M
ichelin tires bothered me.
How do you attach your camera to the wing? I see the suction cups for the
GoPro camera but just don't trust that. Do you back out a few screws from
the wing and screw down a mounting plate?
Greg
do not archive
On Tue, Nov 6, 2012 at 12:54 AM, Charles Brame <chasb@satx.rr.com<mailto:ch
asb@satx.rr.com>> wrote:
I had similar shimmy problems on my 6A. I tried balancing the tires with li
ttle or no help. Van's answer was to reduce the tire pressure. As I remembe
r, Van's recommendation was about 20 psi. My shimmy stopped at 25 psi and I
have used that ever since. I have found that lower to higher ambient tempe
rature will change the tire pressure enough that the shimmy will sometimes
return. Likewise, my 25 psi flatland tire pressure didn't work in Denver, a
nd lowering the tire pressure to less than 20 psi solved that.
Another possible cause is the axle nut(s) being too tight. Make sure all th
e tires will spin freely with the airplane jacked up. I had that problem wi
th the nose gear which caused the nose gear to bounce vertically on landing
. Basically, the axle was too tight due to the design, and the tire wouldn'
t freely rotate more than 1/2 turn. I went to a Grove wheel and axle and t
hat solved that problem.
Charlie Brame
RV-6A N11CB
San Antonio
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Time: 03:08:03 PM PST US
Subject: RV-List: Landing Gear Shimmy on RV8a
From: "fastpilotrv8" <fastpilotrv8@aol.com<mailto:fastpilotrv8@aol.com>>
I on my 2002 RV8a has had the landing gear shimmy has gotten much worse in
the
last 6 flights . I am running 45 lbs air , no flats spots . The mains are
really
shaking a lot. anyone with Ideas please watch the video on You Tube and
please give me your Ideas
http://www.youtube.com/watch?v=_HrcTKt3zBc
my email is fastpilotrv8@aol.com<mailto:fastpilotrv8@aol.com>
_blank">www.aeroelectric.com<http://www.aeroelectric.com>
.com" target="_blank">www.buildersbooks.com<http://www.buildersbooks.com>
="_blank">www.homebuilthelp.com<http://www.homebuilthelp.com>
_blank">http://www.matronics.com/contribution
t="_blank">http://www.matronics.com/Navigator?RV-List
tp://forums.matronics.com
rsbooks.com>
m>
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