Another servo problem to ponder

[Patternrules at aol.com]

In a message dated 2/21/2004 7:11:48 PM US Eastern Standard Time, 
gene.maurice at comcast.net writes:
Please help. I have stripped aileron servo gears FOUR times. At first I 
thought it was infant mortality followed by the dumb ass missed a piece of crud in 
the servo case. I don’t think that’s what happened
 
Here’s the setup. The plane is an Aries, JR 8231 servos. Plane and servos are 
less than four months old: about 60-70 flights. Right aileron has broken 3 
times and the left has broken once (one each today). The breakage has always 
been slightly right of center on the output gear. There is no static binding. The 
hinge lines are sealed.  I can’t be positive but I believe the gears are 
breaking during a down line snap. BTW, I snap to the right. I don’t believe its 
flutter because the breakage is NOT at center. I don’t believe its excessive 
travel because the breakage is not at the extremes of travel.
 
Can the initial load of a snap place enough load on an 88 oz. servo to break 
a gear? I have used this exact same servo setup in two other planes. I did 
break a gear one in one of those planes. Again, I just chalked it up to wear.
 
Confused and at a loss in Plano. 
 
Gene Maurice
 Gene is your engine soft mounted, and what hinges are you using?


Steve Maxwell
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20040221/754bc34d/attachment.html