[NSRCA-discussion] Another trimming question

[Koenig, Tom]

Pete,

at risk of getting crucified by those who are much more knowledgeable
than myself ( Nat?)


*	wing section and %
*	LE radius ( not as sharp)
*	Taper reduction ( 25% chord line)
*	reduce wing area
*	etc etc etc

If you were to try another wing then everything else will change too-how
much work do you want to do?
I assume you have a different program for the windy conditions?

Tom ( flame suit on!)



-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Peter
Pennisi
Sent: Wednesday, 25 October 2006 8:38 AM
To: 'NSRCA Mailing List'
Subject: [NSRCA-discussion] Another trimming question



Hi Guys,



I am looking for opinions.



I am currently flying the COMP-ARF IMPACT with DZ160 which I am very
pleased with.



Model is flying with no trim and negligible mix. There is no rudder to
elevator mix for knife edge flight and 5% mix at large rudder throws for
rollers etc.



Model climbs as straight as an arrow so I am happy with my thrust
settings and the model pulls ever so slightly to canopy on long down
lines which is mixed with throttle.



The incidence settings are 0 degrees on tail-plane and approximately
1/6th of a degree positive on the wing. The CG is about right and I
don't want to go any further forward as it creates too much work when
rolling in 45 degree up lines.



I know most of you will say that the model is fairly well trimmed. The
model is pure pleasure to fly in the calm and really locks on well
however when the wind comes up it is a different animal to fly. The
model gets knocked around and I find it very difficult to lock in a
line. I am only talking about moderate wind here. My other model
(Alliance) seems to handle the windy conditions better.  I don't want to
go any heavier in the nose otherwise rolls become too much work. I would
actually like to bring my CG further back but it will make the model
even more difficult to fly in the wind. CG is currently 5 mm behind rear
of wing tube. Model weight is 4.72 KG



Question: Will changing wing incidence have any effect on model behavior
in windy weather without affecting the rest of my settings / trimming. I
only have 1/6th of degree positive and I know a lot of people run
anywhere between 0.25 to 0.5 degree on their models.



Thanks



Peter







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