tonyplane(at)bellsouth.ne
Guest
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 Posted: Tue Feb 28, 2006 7:43 am Post subject: re Aileron stiffness and force - XL |
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Andrew,
I also have the dual sticks on my 601XL. In addition to the other comments,
you may wish to check if the stiffness exists without the cables attached.
If so, one possible reason is that you may have inadvertently left out the
6DS-3-2 column bushings, thus providing a clamping force on the sticks or
left out the bushings on the 6-DS-3 - 3 rod ends, causing the rod ends to
contact the sticks or the 6DS-1-6 control horn plate.
My control assembly movement before cables were attached was smooth. I
agree that in-flight, the ailerons on the XL are not "Twitchy", however they
are not excessively heavy on my XL..
Another thing to check for an excessive right wing down is (from a prior
post)
"My spouse asked why the sticks had a left leaning tendency. (this was while
I was building the airplane and after the elevator cables were attached but
not finalized) The lower elevator cable is on the centerline of 6B16-2.
The upper is displaced to the right of the centerline on 6B5-2 - this
creates a built in bias to lean the stick
to the left (left wing down)- unless corrected."
Tony Graziano
601XL N493TG (ser 5342) 69 hrs.
Time: 11:08:35 AM PST US
Subject: Aileron stiffness and force - XL
From: "AndrewC" <andrewgcampbell(at)tiscali.co.uk>
Hi there
I'm still going through the test flying of my 601 XL, G-DROO, and the
probleme
du jour is that the ailerons require excessive force to operate in flight.
By
excessive I mean, two hands are required and my test pilot rightly wants it
fixed.
Elevator control is fine by comparison.
My XL has the twin sticks and the flap trim booster mod required by the UK
authorities.
Application of right stick is heavier than left and when right is applied
the ailerons tend to want to settle back half-way towards neutral. Left
aileron behaves normally by comparison but is still heavier than I would
like.
I understand that aileron control on 601s is heavier than in other planes as
a starting point, but this is really too much!
The problem is that I have no idea why they are behaving this way and don't
know
what to change to try and sort it out. Experience of anyone who has the
twin
stick would be much appreciated. The twin stick arrangement appears to have
the torque tube rotating through metal "bearings" (though these are really
just
holes in metal plates) and one delron bearing. This arrangement seems quite
high friction but I'm not sure what lubricant I can use here. Also I can't
understand why right aileron requires more force and is more prone to return
to
neutral than left. Any ideas?! [Rolling Eyes]
Thanks in advance
Andrew
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