Graham,
Well said. If a plane comes in here we do the same thing. It saves a
lot of head scratching. We measure root, (granted outside of the filler
and fillets), mid wing between the flap and aileron, and tip. Then
compare the two wing sides. If you adjust the flap and aileron to even
them up (the aileron has to be contoured to stay where you want it) it
makes trimming a lot less trial and error plus you don't need those ugly
bendy tabs.
Bud
----- Original Message -----
From: GRAHAM SINGLETON<mailto:grahamsingleton@btinternet.com>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Thursday, July 04, 2013 3:29 PM
Subject: Re: Europa-List: Re: Angle of Incidence on a Classic
Taildragger Downunder
The AoA that must be accurate is at roughly the outboard end of the
spar.
AoA at the wing root is pretty irrelevant. Think about it, there's
almost no rolling moment there.
I made a jig to measure AoA using the leading edge and the trailing
edge, a Vee on it's side for the LE and a straight edge to sit on the
trailing edge. Straight edge to join the two. This is your datum line,
not essential that it is parallel to the wing chord line but you will
need to use a digital level.
Next get the first wing set up as per the manual.
Now set up the second wing to match the first.
It wouldn't do any harm to check the wings at the tips too, this will
tell you if the wings have different washout angle but maybe you
didn't want to know that!
Graham
-------------------------------------------------------------------------
-----
From: AirEupora <AirEupora@sbcglobal.net>
To: europa-list@matronics.com
Sent: Thursday, 4 July 2013, 16:39
Subject: Europa-List: Re: Angle of Incidence on a Classic Taildragger
Downunder
<AirEupora@sbcglobal.net<mailto:AirEupora@sbcglobal.net>>
Tony, I can tell you from experience that both wings have to be the
same. I set my up with the fuselage bottom only. I now have both top
and bottom on and have 30 hours of flight time. I have a left wing low.
I went back and measured both wings and the right is 2.4 degrees and
the left is 1.7 degrees.
Not sure why! I took pictures of the level showing 2.5 degrees on
both wings!
I have lower the left wing flap about a degree or two, but at low
speed the aircraft left wing drops in a second. I'm planning on
resetting the front socket.
I'm worried about the holes that I drilled in the metal plate that is
in the fuselage and will cut out the fuselage skin and add a plate to
the ole one then set the wing up correctly.
Do it right the first, second, third time. If it's right you will
have no troubles when you fly it. Use a laser measure from the tail
plane tubes to the wind aileron end plate to set the sweep.
Rick Stockton
N120EJ
Jabiru 3330L
Whirlwind Ground Adjustable
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