View Single Post
Old 08-31-2011, 07:45 AM   #5 (permalink)
EcoModding Lurker
Join Date: Oct 2009
Location: Massachusetts
Posts: 65
Thanks: 15
Thanked 25 Times in 13 Posts
One of the major sources of wheel drag appears to be caused by jetting vortices exiting out and up from the tire/road intersection. This was first mentionioned by Morelli (he of the Aptera bodyshape) citing Cogotti, whowas able to achieve a power reduction of 5kW for and expenditure of 240W by adding in-wheel turbines to the rear wheels, and directing the flow to counter the vortices (SAE 2001-01-0491 it'll cost ya)
More recently Tamas has produced a flurry of papers, all of which are freely available as PDFs online. Here's a couple.

The first one seems to show some promising techniques for simple add-ons, in other words, Ecomods.
  Reply With Quote
The Following User Says Thank You to autogyro For This Useful Post:
aerohead (06-04-2014)