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Date: Sat, 06 Nov 2004 12:22:48 -0500
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From: "Jerry Fisher" <jeremyfisher@verizon.net>
Subject: RE: [LML] WG: Flap travel 360 outbackgear
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Christian Meier wrote:

"In my planes I find a total flap travel of 47?
-7? for Cruise and +40?
Do I need this 47? of total travel?
I have the outbackgear and the total travel of the flapmotor is 16cm
But I cant get 47? out of these 16cm
My pushrods to the flaps are a bit shorter than they should be.
(All this because the rear Spar in 1" back... known problem with
outbackgear)

Do I need the -7? (flap up)for cruise?
Do I need +40? (down) to land on a 2200 feet runway or will be 35? also fine
How can I extend the travel with this flapmotor."

Christian,

Although the outback flap system is a simpler layout in principle, in
practice it can be very hard to fit satisfactorily.  I know, I fitted it 3
times before I got a decent fit.  Part of the trouble is that some of the
instructions and the plans are not compatible.  In one place, the
instructions tell you to go from reflex at 7 degrees up from the faired-in
position to full down at 40 degrees, in other words a total travel of 47
degrees.  So according to this the position where the flaps are in line with
the fuselage shape is the 0 degree position.  This is wrong for the 360, it
is a throwback to the older 235 instructions, and has confused a lot of
people, including me. The plans and other instuctions are correct, you need
to measure from the faired-in position (which is 7 degrees of reflex) 8.75
inches down, measured at the trailing edge, which gives the correct angle.
It is a tight fit, but can be done.  And yes, you do need shorter pushrods.

Jerry