Kevin,
Your symptoms seem to contradict your analysis, or maybe I am completely out
to lunch. If the left flap were lower, then the left wing would produce
more lift - manifesting itself in a right turn. On my monowheel, there is
a slight tendency to roll left when flown solo. With 2 up, the roll
disappears. You need to check the flap position using the profile jig that
was originally used to set the flap position. Is the wash out correct on
both ailerons and flaps. Does the aircraft drop a left wing at the stall?
G-JULZ had a nasty wing drop at the stall which was cured by a slight
adjustment of the ailerons. The ailerons on my classic wings have a very
slight difference in neutral between sat on the ground and loaded in flight.
Also, I guess you are using the slip ball to trim out in flight, is the slip
ball horizontal set correctly, I fitted a small trim tab to the rudder to
make the aircraft 'straighten up and fly right' as the song goes. Could it
be a rudder trim problem?
Regards,
Mike
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of craig bastin
Sent: 06 March 2009 03:41
Subject: RE: Europa-List: Flap position, Flight testing
I think you might run into assymetry issues between the tube and the pins
with one hinge arm longer
than the other. If you did the alignment of the plates and the two root end
flap hinges and all was good
you may have the pin in the flap out of position. if thats the case, you
could get a machine shop to make a
new pin that is eccentric, rather then the longer process of cutting the
flap to bits to move the pin a few mm.
The other thing is if you correct the cruise issue, what will happen at full
flap, will it have a nasty habbit of pulling to the right, or rolling left
because of the extra lift on the right wing???? Just a thought.
The other thing is maybe... you should look at both flaps, and the
clearances, perchance the left flap
is hitting inside the wing, thus holding it a few mm down compared to the
right wing. I had an issue
with that, i ended up removing about 20mm from the from of one flap and
reglassing it to get it to fully retract.
craig
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Kevin
Klinefelter
Sent: Friday, 6 March 2009 9:39 AM
Subject: Europa-List: Flap position, Flight testing
Hi All,
Flight testing of 914 powered monowheel N211KA is going well (29 hours).I
have a flap position question for those who have been there.
The aircraft has an irritating left turn in it when flown solo and slight
left turn with two up. When trimmed out cruising straight and level the
ailerons are close to even with the wing tips and the left flap is
noticeably lower relative to it's aileron than the right side, which is
almost even with the aileron. I think if I can rig the left flap up even
with the aileron it will help cure the left turning problem and be less
drag.
I thought I might get a new flap hinge arm (FL16) on the left and with the
aircraft supported and flaps up in the desired position I could drill new
holes thru the lugs on the tourqe tube so the left flap retacted position
matches the right.
Will this work or is there a better way?
Thanks, Kevin... flying and grinning...
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