[rebel-builders] Rebel - Adjusting Aileron/Flaps

[Bob Patterson]

Hi Charlie !

It could well be that bellcrank is reversed - it has been mentioned
here before, and I thought it was in the manual somewhere ... guess not.
By all means, check it out ...

That said, it's not unusual to see a small difference in droop -
(although 1/2" would be about the limit ...)
and it changes from one side to the other when you go to reflex ...
It's not a big deal in flight - hardly noticeable. Mine is set up so
it's close to even in reflex, since that's where it spends most time.
That allows for literally hours of hands-off flying ... :-) This
gives a bit of aileron pressure at full flapperon, but not a lot.

Can't see why changing the front bellcrank should affect the
elevators at all ! The pushrod comes out on a bit of an angle,
but doesn't affect the fore-and-aft movement of the stick.

Be sure the nut in the center of the rear bellcrank is snug -
that's a regular (monthly) pre-flight check item, as even 1/4 turn
of slack THERE can really create a LOT of slop in the ailerons !

--
......bobp
bobp@prosumers.ca

http://bpatterson.qhealthbeauty.com
http://apatterson2.ordermygift.com

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-------------------------------orig.-------------------------
On Monday 19 October 2009 18:09, Charlie Eubanks wrote:
[quote]Hi Ken

You are right in that there are a number of things that could contribute
to the unevenness and difficultly in getting the controls properly rigged.
I followed all the steps in the manual I thought but it still a head
scratchier. My smaller push rods and the 2" torque tubes in the fuselage
are just clecoed so I can still do some adjusting, if I can figure out
what to do next.

The other item in your message about the mixer bell crank was a BIG
surprise to me. I can find nowhere in my manual any mention of the mixer
bell crank having a uneven hole pattern or that it could be installed
backwards. I assumed it to be symmetrical. I just checked the hole pattern
and you are correct. The holes for the two smaller push rods are a 1/8"
different in distance from the hole for the 1" push rod. If this info is a
factor in the successful rigging of the controls, on which side does it
go? Was there somewhere in the Rebel files an alert posted I may have
missed? I guess it still not to late but this info may have saved a lot of
time and head aches had I have known.

Sorry I can't answer your question about the modified bell cranks effect
on the elevator. I have yet to install the elevator or rudder cables. I
would be interested in your concern however.

Thanks for the heads up on the mixer bell crank.

Charlie E. 802R

----- Original Message -----
From: "Ken" <klehman@albedo.net>
To: <rebel-builders@dcsol.com>
Sent: Sunday, October 18, 2009 8:37 PM
Subject: Re: [rebel-builders] Adjusting Aileron/Flaps

[quote]A few other guys have mentioned this as well Charlie.

It might be due to the aileron horns being riveted on in slightly
different positions or the horns on the torque tube riveted on in
slightly different positions. If that is the case you may have to live
with it. Markedly different length push rods on the aileron horns will
also do it.

Another thing that could do it is if the mixer bellcrank is backwards.
That bellcrank is not quite symetrical and it is easy to install it
backwards.

On a separate issue:
With your modified bellcrank, do you notice any affect on the elevator
when you go full left or right aileron. I have been hesitant to make
that mod.

Ken

Charlie Eubanks wrote:
[quote]Hello all

I have a question on flap deployment.

Thanks to Ron Shannon I now have the correct length of Teleflex cable
installed in my Rebel. After modifying the hole location from 2-3/8" to
2"
on the newer bell crank I am now able to get 4" up (16.7