need help with strange belcrank- leadout connection

[dave siegler]

This is a magician that needed a recover and some other minor stuff. 

lets be clear I DID NOT BUILD THIS I would never try this

It has solid leadouts and the belcrank termination is a little strange.

The music wire passes over the belcrank, behind the ear. 

The front part of the loop passes through the belcrank hole and bends over the wire to lock it.   

I did a pull test, and it all seemed solid. and it did not budge.   

I would rather not tear up this thing any farther.  As getting the covering off has been a big time suck.

Can I leave it? 

If not what is the best way to correct it? 

[Tim Wescott]

Your pictures are a bit small, but I don't see any wear.

No wear visible from middle distance, the plane's old enough to need recovering so it's passed the test of time, and it passes the pull test.

Without close-ups, I'd say it's good to go.

[dave siegler]

the airplane was never finished, so there would be no wear.  I was $20 for airplane + new never run fox 35 stunt. 

[Randy Cuberly]

From what I can see in the photos the setup would be very "springy" at the least.  That's not good in a control system.  At the worst the loop will pull around the end of the crank and lock up!  Personallly I would not fly it like that!

My advice is to replace the leadouts!

Cut the old ones and CA glue the end of a flex leadout onto it and simply pull it through the wing...
use a loop tubing bushing through the bellcrank and a crimped copper tube the hold the loop.

Randy Cuberly

[phil c]

I think all the arrangement does is make the leadout-bellcrank connection a little more springy.  The wire has four bends, including the one before the wire goesthrough the bellcrank, versus a conventional setup with one bend before the wire goes through bellcrank.  It seems likely the controls will tend to get more sticky(from the wire bending out of shape) if the plane ever hits the end of the lines hard.

[Tim Wescott]

Ah.  If it's never flown -- then what Randy said.

[RogerGreene]

Can you take your needle nose plyers and twist the lead out wire so that the end is in the bell crank ear? You may have to remove a little more of the wood planking to do this, but it seems the easiest answer to your problem. This is what I would do. A plane and a never run Fox 35 stunt engine for $20 is a great deal.

Roger

[Randy Cuberly]

Can you take your needle nose plyers and twist the lead out wire so that the end is in the bell crank ear? You may have to remove a little more of the wood planking to do this, but it seems the easiest answer to your problem. This is what I would do. A plane and a never run Fox 35 stunt engine for $20 is a great deal.

Roger

Well, I guess I've learned something new...I didn't know bellcranks have ears!  I also hope Dave understands more about what you mean than I do! 

It really doesn't make any sense to me!

Guess I'm stupid after all!

Randy Cuberly

[dave siegler]

I cut out some of the sheeting about 1/3 of it and put in new solids.  It will be ok now.  Just putting too much time on this one.  Need adjustable lead outs drill for a motor an finish. 


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