View Single Post
Old 08-28-2011, 11:02 AM   #28 (permalink)
redyaris
Master EcoModder
 
Join Date: Jan 2010
Location: Alberta Canada
Posts: 744

redyaris - '07 Toyota Yaris
Team Toyota
90 day: 45.54 mpg (US)

Gray - '07 Suzuki GS500 F
Motorcycle
90 day: 70.4 mpg (US)

streamliner1 - '83 Honda VT500 streamliner
Motorcycle
90 day: 75.63 mpg (US)

White Whale - '12 Sprinter 2500 Cargo Van
90 day: 22.01 mpg (US)
Thanks: 81
Thanked 75 Times in 67 Posts
Quote:
Originally Posted by PeterS View Post
This picture seems to show the problem pretty well .



It seems that spoiling the aero shape (which would be a horrible pity !) or alternatively leaving a gap between the forward and aft section....it would allow the pressures to equalise across the body and stop there being any side lift .There would still be the straight side pressure but not aero side lift .That might more than half the side forces .

Any comments on this ? I'm just thinking but if anyone can point out my errors I would be pleased and grateful !
The diagram and description are very poor. What you need to know is what are the forces and how do they change for each body. The wing shaped body may only experiance a very low force in the direction of travel and any change in angle of attack will have a proportionally larger change in net force, yet the total force on the body is still less than the force on the rectangle shaped body. So with out some numbers and better explenation you have confusion, rather than understanding.
  Reply With Quote