Showing posts with label CD. Show all posts
Showing posts with label CD. Show all posts

Sunday, 1 January 2012

Japanese electric car startup explains why its cars look so wacky

Note that the coefficient of aerodynamic drag of this electric vehicle is 0.19 (very small) rather than the 0.91 (huge) which has been reported elsewhere.


Also see the previous post about this EV, including a discussion of Cd.

Thursday, 29 December 2011

SIM-LEI EV gets a video walk-through: shaped like a fish, has a big screen (video)

Zero to 100km/h (62mph) in 4.8 seconds, with maximum speed of 150km/h (93mph), range of 333km (207 miles).

So what's the catch?  Tastes vary, but this is ugly.  First assumption would be that this is for aerodynamic purposes.  In the articles linked below, a "tiny coefficient of 0.91" is quoted.  Update 01 January 2011: "tiny coefficient of 0.91" should have been a tiny coefficient of drag of 0.19, which is actually tiny.  To put this in perspective, the coefficient of drag (Cd) of some other energy efficient cars:

0.28 Chevy Volt
0.32 Honda Insight (2010)

Toyota claims a Cd of 0.25 for its Prius, but other manufacturers claim it is more like 0.30 .

http://www.engadget.com/2011/12/28/sim-lei-ev-gets-a-video-walk-through-shaped-like-a-fish-has-a/

http://www.engadget.com/2011/03/31/sim-drives-sim-lei-electric-car-achieves-207-mile-driving-range/

https://www.youtube.com/watch?v=VPwphfWTZ6w&feature=uploademail

And a discussion of Cd:

http://ecomodder.com/forum/showthread.php/gm-chevy-volts-cd-0-28-prius-0-a-11313.html