REFLECTOR: Flight data -

[Rene Dugas]

Al,

I ended up with a 1/8th inch wide washer and ground it down to
approximate the angle the wing attachment points will assume when the
spacer is placed which was about 1/16th inch measured with a micrometer
near the hole.  I placed one on each wing root with good balance.  Prior
to correction it took over an inch and a half of aileron for straight
flight.  I did not measure the amount the wing tip moves back with a
shim which will decrease the incidence of the winglet.  I get a harmonic
or slight  vibration at 165 knots indicated and have for three years.
If I go faster it stops.  No flutter to 225 knots indicated.
(Accidentally split “S”ed out of an aileron roll.)

Rene’

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Al Gietzen
Sent: Thursday, September 14, 2006 7:08 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Flight data -

 

Subject: Re: REFLECTOR: Flight data - Was Props

 

My Wingco wing turned right with incidences the same on the leveler.  I
decreased the left wing incidence and when I got to level I split the
difference and shimmed each wing for level flight.  Unfortunately I had
to re fair the leading edges to match.

Rene’

 

Rene’,

 

It took aileron deflection of close to an inch to go straight.  What was
your case, and do you have an idea of how much shim washer thickness
needed.  I now have some shim washers on the top bolts on the right side
of about .030, which I can remove and put on the left side.  Think
that’s enough??

 

My rudders seem to be aligned quite nicely both sides.  Does having a
200# pilot only have any effect on roll trim?  My added oil cooler inlet
scoop is causing a bit more drag on the left side – which already has
the armpit scoop for the radiator in the cowl.  Don’t know how much
effect that has.

 

Wayne – I have complete corruption of the mixture correction table going
on, as well as other setting changes.  We are looking at possible
electrical noise getting into the programming circuits.  

 

Thanks,

Al

 

Had the plane in the air for ½ hour yesterday, basically orbiting the
airport at about 3500 MSL (DA about 6500’); OAT of 90F.  With my
augmented inlet scoop for the oil cooler, the engine temps were fine.
Basically no envelope expansion yet, cruised level at 65-70% power.

 

Typical data was 2050 prop RPM, TAS 160 kts (IAS about 145 kts).
Estimated power setting about 60-65%

 

Continued problems with RWS engine controller (EC2) – spurious data
setting changes.

 

New problem is tendency for turning to the left – right control input
needed to go straight, some right rudder needed to offset adverse yaw
due to the aileron input.  Seems clearly a wing incidence issue.
Incidence checks with the gage shows both wings to be exactly the same;
however, I have known since installing the wings that this was a concern
because the leading edge profiles of the Wingco wings are not the same.
The incidence is going to have to be set by trial and error.  Major
bummer.

 

But, hey; it was up there flying, looking great and sounding great for a
significant period of time, and came back safely.  Have to be happy
about that.

 

Al

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