>Andrew Sarangan wrote:
> > Also, are you saying that the 0.14 deg difference is
> > too much, or that it is too small to worry about??
>
>I don't really know, but practically -- in equalizing wing incidence,
>the book says +/- .05, but .05 is an error at the wing leading edge
>equal to less than 4 sheets of copier paper. It will be no more
>accurate than what is ultimately being referenced, the mean chord line
>at the root, and further assumes equal twist in the wings further out,
>and exactly equal flap rigging.
In fact it's further out that makes all the difference. An error at the
wing root will have little effect on roll, if incidence is not correct at
the tip of the flap that will have a big effect on residual roll. As will
flap setting of course. I always check the first wing at its root, then set
the second wing up to match the first at 70% span.
Graham
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