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Subject: Re: LNC2 flap travel 360FB
>
> Over 35 degrees of flap travel, here is what I measure left and right:
>
> 10 deg... 9.0 left 10.0 right
> 20 deg... 18.1 20.0
> 30 deg... 27.8 30.1
> 35 deg... 32.5 35.0
>
RESPONSE:
The differential flap movement variance could be the result of differential
moment arms of the belcrank ends of the Mark II flap torque tube or the
location of the rod end bearing mounts on the flaps. Once you have
constructed the part it would be difficult to compensate short of rebuilding
the component. With only a 2.5 degree variance I am sure in flying you
compensate with the stick. You will find that minor tweaks or differences
from true alignment are very forgiving in the airplane. When building a
glass plane you have already found out that exact measurements are the ideal
world and the real world is something short of perfection.
When you get to the trials you may find you have a left heavy wing and can
compensate with differential flap adjustment as I did. Then of course you
may decide to keep the flaps at the same angle to reduce drag and control
the left heavy wing situation with aileron control which has a longer moment
arm at center of lift thus correspondingly reducing the drag.
I personally would not worry about the maximum 2..5 degree differential at
35 degrees down flaps. You are busy flying the plane and working the stick
and probably would not even notice the difference in the real world from the
perfect world solution. Enjoy the building and flying experience. Remember
the engine incidence and horizontal stab incidence variance. I would submit
that you are close enough for the flaps. Good luck
Bob Smiley rjsmiley@tscnet.com
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