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![]() the simple formula for best speed was best l/d speed plus 1/2 the headwind. Don't recall the second ever being explained though. Just seemed to fit. Not a formula but a rule of thumb that's pretty close - judging by a number of polars I've looked at. The following article is very simplistic but was written for a student who had trouble grasping the concept of needing to stay upwind of the field in strong conditions: http://home.comcast.net/~verhulst/GB.../headwind.html Tony |
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