View Single Post
Old 10-21-2013, 06:50 PM   #27 (permalink)
aerohead
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,279
Thanks: 24,401
Thanked 7,368 Times in 4,767 Posts
4500 ft

Quote:
Originally Posted by kennybobby View Post
It takes 2.5 to 3 hp to go 100mph at sea level for a 180 to 200lb, .0005 crr, .10 to .11 cd, 3.5 to 4 sf vehicle.

Going up to 4500 ft drops the air density such that they were able to reach 83mph with the ~1hp (800 watts).
I used your rolling force coefficient,4-sq-ft,and Cd 0.105,rho = 0.0020944, and got a road load horsepower of 1.7085 @ 83 mph.
I've not heard of athletes able to produce more than 2-hp momentarily at sea level.
At sea level it looks like you'd need in the neighborhood of 3.132 hp for 100 mph.
Looks kinda doubtful doesn't it?
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote