View Single Post
Old 07-20-2011, 10:29 AM   #35 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location: ÿ
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
Quote:
Originally Posted by jkv357 View Post
Streamlining, for economy or top speed, is meaningful in this discussion IMO.
Breaking speed records with high power engines is a red herring, having enough power to keep up and stay up with traffic is really the only power requirement.

Guess I will have to do your homework for you

Schultz Engineering - Electric Motorcycle Aerodynamics
"The ZX-12R has a frontal area of 6.09 ft2 (0.566 m2), physically larger than the Hayabusa, which is 6.01 ft2 (0.558 m2 ). ...
coefficient of drag, which is 0.603 for the 12R and 0.561 for the Hayabusa...
It's worth remembering, however, that neither of these CD figures indicate a particularly impressive degree of streamlining...
Such is the nature of streetbikes, where performance derives mostly from extreme power-to-weight ratios..."

You are not going to win a vetter competition with a 0.561 CD, though a really small person on a really small bike might.
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote