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Autopilot and Bellcrank assembly help

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Happy Autopilot and Bellcrank assembly help

Post  AmishPilot on Fri Jul 08, 2016 5:26 pm

Hello all,

This is my first post. I just recently got a piper Comanche from cox international. We've got it all put together except we aren't quite sure how the two pieces to steer the thing go together. They sit on top of one another, but it seems as though there should a more satisfactory 'seating' than simply friction to make the Bellcrank move the 'triangle' piece and therefore the wire, elevators.... Does anyone know for sure if this should fit snug or if it really is just friction and a prayer that holds them together? I called Bernie but even had trouble believing that just friction holds them together...

Thanks!

Like this? If so, what is the function of the two posts coming out of the bottom piece?

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Happy Re: Autopilot and Bellcrank assembly help

Post  Marleysky on Fri Jul 08, 2016 7:36 pm

Here is an parts diagram:
https://5dbfd882-a-62cb3a1a-s-sites.googlegroups.com/site/coxengineforumfiles/Cox%201977%20Parts%20Catalog.PDF?attachauth=ANoY7cojWcNO5TrKOD9iHy1m3IfBP1c2AX9TZgvLYbGa58Fmr89R0k2UmtyJA6QjERCUA7Jvq1TycTj1Vkmpub3HHXJdWj5Bb927sP308UtOYNdRRJ9nnAXg_f-IhWIfBqNacUIWum7ASddf57ccCjbzuOJVcUQ1-neIluZeNaGiV-Owt0FGwFmsKd0vRcxQAAMTbtaMR0VhM1sBJsO1hA4_wHay7c7N1M5TovcmFmsmM6J2T3dGK0U%3D&attredirects=0

Or go to the "instruction sheets" link on the LH side of this page. And look for the 1977 parts catalog, page 7 of 44 shows the parts in the proper position.

I'm guessing but it looks to me like the bellcrank sits on top of the Molded in "post" in the bottom of the fuse, and must be held in place when the top of the fuse is attached.


Last edited by Marleysky on Fri Jul 08, 2016 8:03 pm; edited 1 time in total (Reason for editing : My guess)
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Happy Re: Autopilot and Bellcrank assembly help

Post  RknRusty on Sat Jul 09, 2016 1:36 am

That's an odd one. Elevator, rudder and autopilot assy. Sorry, I've never seen one like that.
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Happy Thanks!

Post  AmishPilot on Sat Jul 09, 2016 2:39 pm

Thanks to the both of you, that did the trick!
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Happy Re: Autopilot and Bellcrank assembly help

Post  Cox International on Tue Jul 12, 2016 10:42 am

And we finally "got it" lol!

It's the tip of the wire that engages the assembly.
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