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Old 04-12-2012, 01:46 PM   #149 (permalink)
COcyclist
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Join Date: Dec 2007
Location: NW Colo
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TDi - '04 VW Golf
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Quote:
Originally Posted by some_other_dave View Post
A lot of the sports-racers from the 70s (e.g., Porsche 917K, Ferrari 512) had the fender cut away aft of the rear wheels. Not sure if it was more for down-force or if it helped drag.

917:
FYI the 917 was designed for downforce not low drag. Jack discusses this in his blog.

MAX Update No. 90: Why ' Real Old' Beats ' Old'

Nimble, I remember reading somewhere that in general, smaller wheel houses are more aerodymanic/low drag, so you are on the right track. I brought my belly pan as close as was reasonable to the rear wheels and extended the fenderliner down to seal out turbulence, slush and snow.

[IMG]http://ecomodder.com/forum/member-cocyclist-albums-belly-pan-install-picture2646-img-0141.html[IMG]
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Quote:
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.

Last edited by COcyclist; 04-12-2012 at 02:08 PM..
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