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Old Oct 30, 2012, 04:26 PM
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United States, TX
Joined Jun 2011
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I am sure there are different methods for setting washout, but I have always waited until after the wing is covered before setting washout because heat shrink coverings can sometimes create a warp. I then use the covering to hold the washout.

The way I measure it is by attaching a long straight stick of balsa to each wingtip at the same place on each wing, using a rubber band. The bottom of the airfoil is straight, so I have the stick against that with the rubber band up over the top of the wing to hold it.
Then I mark a location some distance from the leading edge, on the stick, like 1 foot. Then prop up the plane nice and level (I use model car boxes), and compare measurements from the leading edge up off the level support surface, and then at the 1 foot point. Then I use my iron to warp the wings until I get the washout I want.

Only concern here is, if I'm out on a really hot day, I'll bet the sun would change my washout settings. What other methods are used here?
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