On Sat, 01 Sep 2007 15:54:02 GMT, Matt Whiting
wrote:


I don't know about the Bo in particular, but on some airplanes the flaps
contribute more to drag than to lift.

On a Beech Sundowner, flaps will help climb at *exactly* 75 MPH IAS.
Any faster or slower and the performance drops off significantly and
you'd be better off without flaps.

The performance graph looks like an inverted, rounded Vee, and I've
verified it at altitude.