View Single Post
Old 03-17-2009, 06:40 PM   #9 (permalink)
aerohead
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,267
Thanks: 24,392
Thanked 7,360 Times in 4,760 Posts
Railroad

Quote:
Originally Posted by MetroMPG View Post
Ah ha. I've read more than a couple of quotes in Hucho that seem to be generalizations, and his train comment may be another. Maybe he's missing a few qualifications there.

It makes sense to me that a relatively "short", high speed passenger train with uniform and streamlined coaches is a different animal than a mile long, jumbled up freight train, in terms of boundary layer thickness at the end car.

Efforts to "boat tail" the passenger train are worthwhile obviously.
Can you imagine an extremely light,light rail,with Cd0.08,and a fraction of the rolling resistance of a rubber tire on pavement?------------------------------ I could erect a " Roller-Coaster" that used wind and solar power to raise the empty car to the top of the incline.Have a bunch of folks take an elevator up to fill it.Then coast,from downtown Dallas,40-miles out to Denton,on gravity power alone at over 100-mph!--------------------------------------------------------------- People pay alot of money to have as much fun at Six-Flags Over Texas over in Arlington!------------------------------------------------------------- Mass-transit anyone?
  Reply With Quote