Originally Posted by
chadteck
Right, but what I'm saying is this (with really rough numbers):
No wind entire distance: 20 mph average.
Tailwind half distance: 25 mph average.
Headwind half distance: 15 mph average.
Total average: 20 mph.
I understand you will spend more time in the headwind, but you partially made up for that lost time (vs. zero wind) when you had the tailwind. The point I am making is that I underestimated the effect of a constant wind on an out and back course.
You're doing it wrong. You have to use time not distance.
20 mph, 20 miles = 1 hour
average speed = 20 mph
25 mph, 10 miles = 24 minutes
15 mph, 10 miles = 40 minutes
average speed = 18.75 mph