[NSRCA-discussion] Trimming question

[Lance Van Nostrand]

Not many responses to this one, but here's my thought.  The wing incidence 
is way negative and the CG is aft.  I got myself into that situation once 
and didn't catch it for a while.  Inverted flight was fine but the plane was 
squirrely and the up elv trim was more effective in knife edge than level 
flight, resulting in canopy pull.
--Lance

----- Original Message ----- 
From: "John Pavlick" <jpavlick at idseng.com>
To: "NSRCA Discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Friday, January 27, 2006 10:31 PM
Subject: [NSRCA-discussion] Trimming question


> 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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