REFLECTOR:Wing/Canard/Fuselage Incidence
Pat Shea
reflector@tvbf.org
Fri, 5 Mar 2004 16:32:19 -0800 (PST)
Mike,
I suspect you wouldn't want to change the relative
wing-to-canard incidence (deep stall issues, etc.).
Increasing the incidence of both, however, should
cause the nose of the fuselage to be lower in flight.
In other words, both incidence jigs should still
center - the fuselage would just need to be in a more
nose down attitude than before the incidence change.
Of course, the strakes are part of the wing and are
tied to the fuselage's attitude. Maybe the factory
could advise you on how much, if any, change is
reasonable.
Pat
--- mike deeter <iguanamagic@yahoo.com> wrote:
> Help for advice re: wing incidence
>
> I'm sure a bunch of folks have dealt with this
> issue.
>
> My Std Elite RG flies fine but it also seems to fly
> a
> bit fuselage-high in cruise. Several people,
> including one guy w/ an identical Velocity and
> set of wings (Alan Shaw's), have remarked on it. I
> think so, too, and since that must be a high-drag
> attitude I want to explore what (if anything, since
> it
> flies fine) to do about it.
>
> If it's pertinent, my canard is 1/8" to 1/4" up when
> I'm flying in cruise with a midrange CG.
>
> Questions:
>
> 1. I measured the main wings versus the canard using
> Velocity's incidence jigs and my digital level as a
> standard and found my canard to be about 0.5 degrees
> leading edge low as compared to the main wing.
> Would
> raising the canard incidence 0.5 degrees have the
> effect of lowering the nose in cruise?
>
> 2. What about shimming the upper, outboard wing
> bolt?
> That would seem to raise the angle of incidence of
> the main wing chord slightly. Would that bring the
> nose down in cruise? I did measure my main
> wing/fuselage relationship versus my friend's
> Velocity
> and found no appreciable difference. My
> calculations
> using geometric relations show a 0.030" shim
> changing
> the chord about 0.43 degrees. Significant? Can I
> get
> away with just the outboard bolt or must I shim the
> inboard wing bolt as well?
>
> 3. Any other suggestions?
>
> Of course, both 1. and 2. would have cosmetic
> ramifications as well.
>
> I'd like to get in touch with Alan Shaw but emails
> get
> returned from his old address, wingco@iu.net. Can
> anyone provide a current email and phone number for
> Alan?
>
> Thanks for any advice.
>
> Mike Deeter
> Velocity Std Elite w/ Franklin/Ivo
> N2011P
>
>
>
>
> =====
> *******************************************
> Mike Deeter
> N2011 Test Pilot
> iguanamagic@yahoo.com
> http://iguanamagic.siegesmund.org
> *******************************************
>
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