View Single Post
Old 11-23-2010, 02:35 PM   #8 (permalink)
Aero Wannabe
COcyclist's Avatar
Join Date: Dec 2007
Location: NW Colo
Posts: 717

TDi - '04 VW Golf
90 day: 55.78 mpg (US)
Thanks: 690
Thanked 209 Times in 162 Posts
another tyro weighs in

Originally Posted by Cd View Post
The angle of the back end is really steep - about the same as a new Beetle.
How did he get such a good Cd with all that flow separation ?
The Honda 600 is a very narrow car (just over 3 feet wide IIRC?) and to my eye it looks like the back window is a compound curved polycarbonate. It does appear to be too steep from a side view but there is probably a lot of taper from the sides. The New Beetle C pillar has sharp edges and minimal plan taper. I believe this creates two big trailing vortexes and increased drag (I have seen a fastback diagram from the Hucho book somewhere that shows this). The smooth compound curves on the P-100 would help fill the wake and reduce drag. The back end of Honda reminds me of the front of the Bullet Train I rode in 1979. It also looks like there is a 4 upslope on the rear diffuser. I wish we had more photos and info on this car. Thanks Phil, good find!
60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun

Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
  Reply With Quote
The Following User Says Thank You to COcyclist For This Useful Post:
Cd (11-23-2010)