Today's Message Index:
----------------------
1. 08:35 AM - Gear Leg Shake (Roger Standley)
2. 06:34 PM - Re: VA-144 Nose Gear Bushing (bill.peyton)
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 |
|
=0A
=0A
RE: RV10-List: Knock When Releasing Brake Gear Leg=0A
Shake =0A
=0A
Stumbled on the cause by accident. I had tried usual=0A
culprits including adjusting tire pressures=2C checking for tire flat spots
=2C re-balancing wheels=2C=0A
balancing wheel pants=2C rotating tires=2C checking alignment and installin
g the=0A
wooden braces. The braces shifted the roll-out speed when shaking occurred
but nothing=0A
I had tried eliminated the problem. Time came for new tires. While balancin
g=0A
the wheels I noticed that the right wheel and tire were true but the brake
disk=0A
had a slight wobble. Then I remembered the slow-taxi brake shoe =93chatter
=94 I=0A
would sometimes hear. Chatter stoped with=0A
slight application of right brake pedal. Turns out that the brake disk was
not=0A
warped and only needed to be trued up against the wheel. The thinnest shims
I=0A
had were too thick so I ended up using double sided razor blades. A little
=0A
trial and error brought it all into alignment. Gear leg shake issue resolve
d. Roger#40291=0A
=0A
From: rv10flyer@live.com
Subject: Re: RV10-List: Knock When Releasing Brake
=0A
=0A
=0A
=0A
=0A
=0A
=93This thread reminds me that I never explained how I resolved the "gear l
eg =0A
shake"=94=0A
so how did you?=0A
=0A
I saw that there was a wedge of wood placed on the back of the leg that was
=0A
meant to dampen the leg shake. I randomly get it on landings=2C so haven=92
t pursue =0A
doing it myself.=0A
=0A
=0A
=0A
=0A
From: Roger Standley =0A
Sent: Friday=2C October 10=2C 2014 7:21 PM=0A
Subject: RE: RV10-List: Knock When Releasing Brake=0A
=0A
=0A
This thread reminds me that I never explained how I resolved the =0A
"gear leg shake"
issue. No one has mentioned it for a long time. Problem =0A
solved?
Roger
#40291
=0A
> From: lewgall@charter.net
> To: rv10-list@matronics.com
> =0A
Subject: Re: RV10-List: Knock When Releasing Brake
> Date: Fri=2C 10 Oct =0A
2014 13:42:24 -0400
>
<lewgall@charter.net>
>
> Hey Sean=2C
>
> Just a =0A
reminder about the issue of sometimes the pedal itself doesn't
> =0A
completely release. There is a release passage at the very bottom of the
=0A
> master cylinder on the pedal that keeps pressure on the line if the =0A
pedal
> doesn't retract fully. I actually rigged up springs to help the =0A
pedals
> retract until someone pointed out that the spring in the =0A
cylinder is
> adequate for the job IF there is no binding in the hinge =0A
rod through the
> bottom of the pedal. Making sure that the holes for =0A
that rod are drilled
> straight is a much easier fix. That may not be =0A
your problem=2C but may be
> worth checking out.
>
> Later=2C - =0A
Lew
>
> =0A
=0A
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 |
|
| Subject: | Re: VA-144 Nose Gear Bushing |
I finished up replacing all three nose gear bushings, the 143 and 2-144's. When
I took an more exact measurement, the 144's were both around .737 OD the 143
was .745 OD. I replaced them with the oversized .780 bushings obtained from
Vans. The 144's were turned down to .7625. The 143 was turned to .7640. This
left me with adequate clearance for the bushings. This also eliminated all
of the play in the nose end of the nose gear, both horizontal and vertical. The
AN hardware looked essentially new, so it was not replaced. The Vans P/N for
the oversize VA-143 is Bush-ST 438X780X1.938 Oversize Bush VA-143. The 144
is posted above.
The good news is after a couple of test flights and long taxis, I think I have
eliminated 90% of the vibration I was seeing around 14kts. It was not side to
side shimmy, but more of a hobby horse motion with the nose wheel. The excessive
play must be exacerbating the resonance. It's not totally gone, I only felt
it during the first taxi when the tire had a flat spot. After landing and
taxing back it was essentially gone. I need to have a few more flights to pronounce
it cured.
If you have the RV-10 landing gear shudder and have exhausted all other avenues,
this might be an additional check to make.
--------
Bill
WA0SYV
Aviation Partners, LLC
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=431773#431773
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! --
|