Author Topic: Aileron freeplay  (Read 637 times)

Tim Lunceford

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  • N Number: 18064 41726 41722
Aileron freeplay
« on: October 14, 2016, 03:07:14 PM »
I have been working on improving a number of minor issues on N 41726, including root fairings, Aeromatic prop, landing gear retraction and fit and general sealing.  After the installation of the Aeromatic I became concerned about slop in the Aileron control loop.  I had noticed that one of the ailerons was flying higher than the trailing edge of the wing.  I fixed the left one centered on the wing and was able to moved the right control surface 3 to 4 inches without any resistance.  This strikes me as way to much free play in the system.  There are 8 connection in the loop from the left control horn to the right, each one has some play between the bolts and the bushing.  Has anyone address this issue with a high time Cadet?  If so what was the solution?  Does anyone have knowledge of a Cadet experiencing flutter of the ailerons?  I am planning to replace all the fitting in the system but would like to know what is acceptable as far as the maximum amount of free play.  Tim

Keith U.

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  • N Number: N20988
Re: Aileron freeplay
« Reply #1 on: November 19, 2016, 08:52:16 PM »
Tim,
That seems like way too much slop.  I just rigged my ailerons, can't say for sure, but don think there is 1/4" total.  I wonder about your bushings.  Missing one or two would make a big difference.  Also maybe they are just worn, or the bolts.  Try replacing both at a hinge point one at a time and I bet you will find the culprit.  Also check the jam nut on the push rod going to the aileron.  That much slop makes me nervous...Keith

Tim Lunceford

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Re: Aileron freeplay
« Reply #2 on: November 21, 2016, 11:51:46 AM »
Thanks Keith,  I agree way too much movement.  I removed the entire aileron push rod system including bellcranks.  All joints had bushing with a little play.  Constructed new push rods using rod ends.  I will post picture soon.  I have not had time to install them yet but will l let everyone know how it turns out.   Tim