[NSRCA-discussion] Trimming question

[Ken Thompson]

Wouldn't negative incidence cause it to push to the gear, not the canopy?

Ken
----- Original Message ----- 
From: "Lance Van Nostrand" <patterndude at comcast.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Monday, January 30, 2006 12:40 AM
Subject: Re: [NSRCA-discussion] Trimming question


> 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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