Marc Wiese wrote:

simple adj temp switch:
http://www.assetmfg.com/index.html

fancy IC temp vs ambient controler:
http://www.autospeed.com/A_0589/page1.html?src=suggestions
http://www.autospeed.com/cgi-bin/browse.cgi?category=705&

air-flow (motion) switch:
http://www.autospeed.com.au/A_1043/P_1/article.html

Marc Wiese

Has anyone found a source for those electric fans for the ferrari?
...Chrissi
Cozy Mk-IV 13B-turbo
 www.CozyGirrrl.com

SummitRacing.com has something that looks very much like the Spal
called a Derale Tornada. A 16 inch dia. is 2,175 cfm and cost $119.95.
3.9 inches thick.

Rough calcs gives an airflow through the rad (hopefully if
they rated it that way) of 26 FPS or 17 MPH.

That is one of, if not the highest rated fans in the Summit cat.

Paul Lamar

This is cool. This shows the fan performance degradation as a function
of the pressure drop through the rad. http://www.assetmfg.com/index.html

To put this in  perspective dynamic pressure at 100 MPH is 26 pounds per 
square foot or .18 psi. One psi is .04 inches of  H2O. So dynamic pressure
at 100 mph is 4.5 inches of H2O.  .6 inches of H2O on the face of the rad
is not much.

This fan will generate an airflow of about 13 FPS or 8.7 MPH.
Not much compared to what you can get from an air scoop.
Might be OK for taxi and idle.

Electrical HP consumed is about .36 HP. Assuming the alt is 80% eff. the mechanical
HP consumed would be about 1/2 a horse.

Paul Lamar
 
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