[NSRCA-discussion] Trimming question

[Rcmaster199 at aol.com]

If it has even a little dihedral, turn the wing up side down. If it's like  
most sticks, the wing foil should be symmetricall. The thing's already ugly so, 
 why not?
 
MattK
 
In a message dated 1/27/2006 11:29:36 PM Eastern Standard Time,  
jpavlick at idseng.com writes:

Ok  here's a good one. The owner of the L.H.S. asked me what I thought  about
this and I couldn't come up with a good answer. He has a Hangar 9  Ugly
Stik - the real big one. I can't remember exactly what it's called.  Guess it
has a gas motor in it. It's big. He says he has it trimmed so it  will fly
inverted with just a very slight bit of down elevator (almost  none). Ok, so
it's not nose heavy, maybe even a little tail heavy. Now,  when he flies it
knife edge (either side) it pulls severely to the canopy.  I mean like it
will fly a complete circle. It needs almost 3/4 down  elevator to fly
straight. It's beyond a mix - fix. He also says that it has  a bit of roll
couple when flying level (not knife edge) but it doesn't  pitch severely up
or down under these conditions. Any thoughts? I guess you  can rule out C.G.
because if anything it should pull to the belly  considering how it's trimmed
to fly level upright and inverted. I haven't  flown it so I can't add too
much more. He builds OK so I don't think  there's anything way out of
alignment, but again I haven't seen it yet so  maybe there is. What should I
look for if I get my hands on it to try and  help him?

John Pavlick
http://www.idseng.com


 
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