Hi everyone,
Long time lurker Mike here.
Kinda of getting back into UC with my (adult) nephew after a couple decade break.
Purchased a TF FS ARF with an LA25 w/9x6 prop.
Set it up per instructions, CG 3" back from leading edge, pushrod in middle hole of bellcrank,
and on last hole of ele. horn.
Had to add 2.5 ounces of lead to tail to balance.

Using 60ft lines and stock Brodak non adj. handle, took off and it was EXTREMELY sensitive.
Due to instructions telling you to plumb tank backwards (instructions say to use muffler pressue on top
and plug bottom, thereby saturating fuel with air by percolation) Made it about 3/4 of a circle before engine quit (upwind of course!) Lines went slack and she "landed" pretty hard.

After repairs, moved CG to 2" from leading edge, and replaced ele. horn with one twice as long.
Took of, still seemed VERY sensitive, went around about 1-1/2 times before I got to low and well...
Ya' know... blink of an eye... you know the rest.

Probably ham fisted it too low but it sure seemed awfully touchy.
So my question is "Where should the CG on this model be?"
Thanks in advance for any help in succesfully burning a whole tank through this thing!
Regards,
Mike





Nothing is foolproof, to a sufficiently talented fool!