REFLECTOR: Torque on elevator push/pull tube

[Brian Michalk via Reflector]

I was measuring elevator throw, but my concern now is the rotating 
elevator push-pull tube that is rotating on the rod end threads.


On 09/29/2014 07:39 AM, John Dibble via Reflector wrote:
> Are you talking about both the elevator and aileron?
>
> On 9/28/2014 9:45 PM, Brian Michalk via Reflector wrote:
>> I measured my down elevator deflection, and found that I was not 
>> getting the full throw, and decided to adjust the length of the push 
>> pull tube to fix the problem.
>>
>> I unscrewed five turns on the rod end, and then tightened up the 
>> locking nuts.  Next, I was checking for full range of controls and 
>> noticed that the rod ends are rotating in the tube at the ends of the 
>> max aileron travel.  The problem is that the rod ends are not able to 
>> handle the entire rotation of the aileron tube.  The threaded portion 
>> of the rod ends are rotating inside the bushing.
>>
>> Has anyone else seen this?  I strongly believe that this is a 
>> problem, but I've never heard of anyone else with this problem. It 
>> might take a few years, but it seems like the threads will eventually 
>> strip out.
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