Trim Cable Pulleys

Post-War Aeronca Champ airplanes
gusc
Posts: 590
Joined: Tue Jan 31, 2006 01:16
Location: Ash Flat, AR
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Post by gusc »

I finally got the cables rerouted above the formers and attached to the trim control arm, no mean feat. I had to cut about 6" of the headliner to get those bolts back into place.

Now I have a new problem. One cable is too short so nose down is something like 60* and nose up is 0*. Somehow I have to lengthen the nose down cable by about 1". Any ideas on how to do this?

My first idea was to make up two parallel strips of metal to attach to the cable and the trim tab horn. I found this same thing used at the trim control arm in the cabin.

One more surprise was that there is only one trim cable turnbuckle!! There isn't enough space for another one though because the cable would then be too long!! This makes adjusting the trim tab pretty tricky since the cable tension and tab deflection change at the same time.

This airplane has been full of surprises, none of them good.
Gus Causbie
Ash Flat, AR
N83564, 7AC-2235, A65-8
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Mikek
Posts: 594
Joined: Sat Nov 13, 2004 21:13
Location: Yellow Springs, Ohio 45387 [3OH0]
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Post by Mikek »

gusc wrote: One more surprise was that there is only one trim cable turnbuckle!!
Gusc,

I have two turnbuckles and thats what they show in the service manual, somethings not right.

Mike K
Mike Knemeyer

1410 Meadow Lane
Yellow Springs,Ohio 45387

3oh0
N83348 7AC-2015
N82146 7AC-772
gusc
Posts: 590
Joined: Tue Jan 31, 2006 01:16
Location: Ash Flat, AR
Contact:

Post by gusc »

Mike,

A whole bunch of things weren't right about this airplane when I got it, I'm gradually finding and eliminating them.

I just about have this one solved.

The cable is too long to add the second turnbuckle now!
Gus Causbie
Ash Flat, AR
N83564, 7AC-2235, A65-8
gusc
Posts: 590
Joined: Tue Jan 31, 2006 01:16
Location: Ash Flat, AR
Contact:

Post by gusc »

Today I finally got the trim tab settings to come out right with the correct cable tension. I was having my doubts there for a while.

This is not easy to do with one turnbuckle!!
Gus Causbie
Ash Flat, AR
N83564, 7AC-2235, A65-8
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