Trimming Help

[rcaerobob at cox.net]

Paul, others have mentioned this indirectly, but since you describe the upline roll, wondering if you have verified that BOTH ailerons are moving exactly the same?  If you generally roll one direction as a preference, it may seem that there is a problem, but you COULD have just ONE aileron servo moving differently than the other (i.e. Rt aileron +12,-12,  Lt aileron +10, -14) That sort of maladjustment can create tremendous problems.

I agree with Dave L's comments - try to find a competent flier to test fly yours...

Bob P.
> 
> From: Paul Lawrence <pwl45 at yahoo.com>
> Date: 2004/03/29 Mon AM 08:19:38 EST
> To: discussion at nsrca.org
> Subject: RE: Trimming Help
> 
> The plane is a Tai Ji 60. I may have found an
> incidence
> problem too. I don't really know where the reference
> line is for this model and I am also still learning
> how to check incidence, but if I block up the plane
> and get the wings at 0 degrees and then check the
> stab, it is showing -1 degree of incidence. That seems
> excessive.
> 
> I'm flying Intermediate and the yaw really shows up on
> the humpty bump and full roll up on stall turn. When I
> perform the humpty bump, I pull to vertical, 1/2 roll
> right and the plane heads off to the left(belly in).
> On the full roll up, the plane heads off to the right
> after rolling right.
> 
> So far, I have received a lot of good advice and have
> several things to try. Thanks.
> 
> 
> 
> > 
> > 	-----Original Message----- 
> > 	From: Paul Lawrence [mailto:pwl45 at yahoo.com] 
> > 	Sent: Sun 3/28/2004 10:33 PM 
> > 	To: discussion at nsrca.org 
> > 	Cc: 
> > 	Subject: Trimming Help
> > 	
> > 	
> > 	After getting soundly beat in Ocala last weekend, I
> > realized that I have been getting proverse yaw as my
> > plane rolls.
> > 	It wasn't evident until I saw other well-trimmed
> > planes flying.
> > 	The plane yaws in the direction of roll input and I
> > have been experimenting with a multitude of aileron
> > differential settings and can't seem to remove the
> > yaw.
> > 	With zero differential, the plane still yaws in the
> > direction of roll. 
> > 	The trimming chart says to reduce differential in
> > this condition, but I have reduced it to zero.
> > 	Should I program in negative differential(doesn't
> > sound good) or should I program a litle bit of
> > opposite rudder correction to offset the proverse
> > yaw?
> > 	 
> > 	Also, does CG and Incidence affect adverse or
> > proverse yaw while rolling?
> > 	The plane was a little nose heavy and I have also
> > been adding tail weight to try and clean up the
> > rolls, but still can't get that yaw out of the
> > rolls.
> > 	 
> > 
> > 
> 
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> 

Bob Pastorello, El Reno, OK, USA
rcaerobob at cox.net
www.rcaerobats.net

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