Airtronics Servo 94731

[Larry Diamond]

Thanks for all the responses...

I checked the linkage for the elevators and no slop there. The problem looks
to be the pushrod sleeves. This is an ARF with the sleeves installed. They
were either never supported or the sleeves worked loose in the middle of the
fuse....

I will perform surgery and get the pushrod sleeves secured and upgrade the
servo with higher torque for peace of mind.

Thanks for the help....

Larry


----- Original Message -----
From: "Larry Diamond" <jed241 at email.msn.com>
To: "NSRCA List" <discussion at nsrca.org>
Sent: Saturday, September 07, 2002 2:38 PM
Subject: Airtronics Servo 94731


Need a 94731 Airtronics servo. I know they are available at Tower, but don't
want to pay $75 unless I have to...Wife put me on a tight budget....<g>

If you have one you would like to part with e-mail me @ jed241 at msn.com.

Question of the day...I am replacing a 94102 (50oz/in Torq @ 4.8V) in the
elevator... I had a close call with flutter on Elevator input. I'm assuming
that the servo isn't strong enough and caused the flutter.

Plane is about 8 lbs 13 oz; WS 66; L is 64; Engine is 91FX stock muffler;
15% Nitro fuel; 14 x 8 prop @ 10,300 rpm. I'm working on a nose heavy
condition which I think is part of the problem.

It happened on the 1st flight with a 91FX. The engine was upgraded from a OS
91 Surpass II and didn't present a problem with the flutter condition for
about 50 flights.

I was about 2/3rds throttle during trimming at level flight. I banked right
and added elevator. Flutter started after about 90% thru the turn. The nose
dropped slight and lost elevator control when I heard it. Pulled throttle to
1/3rd, prayed as I eased on the elevator and brought it back in....No
apparent damage and hinges look good. Batteries before and after flight was
about 5.0V.

Should I be looking at something other than the servo?

Larry
NSRCA 3083





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