Plane flies at 100 TAS, 50 knot head wind outbound on a 100 mile leg
and 50 knot tail wind on the return. The outbound leg takes 2 hours
100/(100-50). The return takes .66 hours 100/(100+50). Total for the
200 miles is 2.66 hours giving an average speed of 75 knots.

On Fri, 10 Sep 2004 23:54:04 GMT, john smith wrote:

10 knots of headwind one way isn't 10 knots of tailwind on a reciprical
course?

CB wrote:
Headwinds and tailwinds do not cancel