The wind was blowing at 15 mph and I averaged 15 mph for 2 hours. That means I burned or used up 1/2 of a hp. I'm sorry I still don't understand. If I burned up 414 watts or used up 1/2 HP. What can I compare those figures with? Maybe a power meter would be the way to go. If they didn't cost so much. Thanks for the replies guys.
Weak Link, do you have a power meter?