View Single Post
  #23   Spotlight this post!  
Unread 09-01-2006, 14:17
Kevin Watson's Avatar
Kevin Watson Kevin Watson is offline
La Caņada High School
FRC #2429
Team Role: Mentor
 
Join Date: Jan 2002
Rookie Year: 2001
Location: La Caņada, California
Posts: 1,335
Kevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond reputeKevin Watson has a reputation beyond repute
Re: Calculating Angle to fire at

Quote:
Originally Posted by Kevin Sevcik
Using your standard Fd=1/2*Cd*rho*A*v^2
Hmmm, while we're picking nits, is your assumption that Cd = 0.5 a good one? 0.5 is worst case for a smooth sphere with perfect laminar flow over the surface. These balls are more like golf balls, which produce quite a bit of turbulence behind them, which can drop the Cd by at least half. Also, your drag force assumes a constant velocity. Is this really the case?

I guess I should have said that the effects of wind resistance should be ignored. Discussing drag coefficients and the Reynold's number of a nerf basketball is silly and will only serve to confuse people, who might get turned-off to the idea of going for the three point score.

-Kevin
__________________
Kevin Watson
Engineer at stealth-mode startup
http://kevin.org