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Joe,
I might be able to save you some of the effort I went through rigging the
ailerons. I have a 4P with winglets. On my early flights the stick
force in roll was very heavy. My neutral aileron position was to
low. Per the tech help at Lancair, Ross I think, I re-rigged to make the
outboard trailing edge of the aileron even with the trailing edge of the
winglet. By doing that, the inboard trailing edge of the
ailerons were slightly above the trailing edge of the flaps in the retracted
position. The bottom of ailerons are even with top of the
flaps. That lightened the stick forces considerably.
Ken Kellner
IV-P 14LK
----- Original Message -----
Sent: Monday, March 25, 2013 9:11
AM
Subject: RE: [LML] Re: Aileron
balancing
Wade, I called Lancair
and asked how I should determine neutral aileron position. They said
neutral is determined from the wing tip or winglet…. Out board in.
They also said the top of the flap may or may not be exactly
neutral. Frankly, I thought that the top of the flap, aileron and
winglet should all be at the same level but it appears –in my case- there is
about an 1/8” or so discrepancy between the top flap and top of neutral
aileron. Also the full travel of the aileron was to be 20 degrees down
and 14 degrees up as indicated in the build manual Figure 8:D:6. What I
thought was going to be a simple process turned out to be quite
difficult. Joe Trepicone
From: Lancair Mailing
List [mailto:lml@lancaironline.net] On Behalf Of Bill
Wade
Sent: Saturday, March 23, 2013 6:02 PM
To:
lml@lancaironline.net
Subject: [LML] Re: Aileron
balancing
I did a reality check today and in my situation the Lancair orientation that
Joe pictured worked best. Like others I had tried flipping the weight 180
degrees (flat side on the aileron tab) because it seemed logical that the mass
should be as far forward as possible. It just didn’t work for me, and the
pictures show why.
The
two photos show the weight clearance near the inboard hinge, RH wing. It
wasn’t easy to take the pictures and the quality isn’t great but the first one
shows that there’s about 1/16” clearance at full UP travel, 20 degrees. What
shows is the carbon tab (with the screw head). The weight surface is parallel
to the pocket interior. If the weight was flipped over or on the bottom of the
tab there wouldn’t be nearly enough travel. The second is harder to make out
but I’d say there’s 1/8”+ clearance, and you can see the tab/ weight
relationship better. The aileron there is at 16 degrees DN, 2 degrees more
than required. The manual doesn’t specify how to align the aileron, at least
as far as I could find, so I decided to set neutral centered on the flap. If
others chose to set the aileron top flush with the top of the flap, that would
bias the travel downward, gaining more clearance in the UP direction and using
some of the extra clearance I have downward. Maybe that’s why I seem to differ
from other posters. How did others set their neutral position?
Perhaps the best way to start would be to try different weight positions, see
what the travel is and look into the pocket to get an idea where and how the
weight is hitting. Then choose the way that looks best and go for it. Just use
the same holes in the aileron tab- unused holes in the weight can easily be
filled with solder. -Bill Wade
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