Quote:
Originally Posted by PeterS
Hmmm, this is a bit difficult and I'm glad to be educated . My understanding is that a standard sit up and beg motorcycle is around .9. That works out perfectly with the calculator and a 1955 13hp Royal Enfield on test. It was using it's maximum hp and it's power and fuel consumption were very accurately recorded.
Can you link me to some site giving the cd of various bikes ? Perhaps some allowance for the rider sticking up on top? The rider must get the .9 cd surely ?
What do you think Craig's model would rate ? .35 ?
|
The Hayabusa is supposedly the lowest cd of any production motorcycle. At .55cd. Pretty bad still. Cars can get into the .20's. But there are some smaller class race bikes that are pretty clean so would have less cda than the Busa. Craig's concept? Alan just added a clear shroud to clean up the license plate area behind the rider's head and is playing with partial "doors" to see how clean the sides can be while still maintaining enough opening to vent the maximum pressure differential of the sideways wing shape that eliminates crosswind issues, and to let his feet to touch down. cd of .20?