

| Subject: | Re: aerodynamics, was: 101 MPH Vanagon! |
| From: | David Beierl |
| Date: | Mon, 18 Oct 2004 16:43:45 -0400 |
At 12:49 10/18/2004, Alistair Bell wrote: > From an old Road and Track test of the 1980 Vanagon Was that the issue that also tested a Kenworth articulated lorry and a Hop-Rod (guess what month...)? This was long before my interest in the beast. I remember they were surprised at how well the KW handled when light. And I gained new respect when my own family actually acquired a Hop-Rod and found out how hard it was to stay on the thing. > I found a Cd figure >of 0.44, and from the above article I found the frontal area of the SA >van measured as 3.59 m2 (38.6 ft2). Using a weight approximation of >1720 kg (3792 lbs) I used the calculator on this webpage: > >http://www.davewin.com/tech/horsepower_calc.shtml > >to arrive at these results: > >speed (mph) power required (hp) > >50 19.3 >60 30.6 Some issue of ?Road and Track? listed the Vanagon in their superlatives category for highest horsepower requirement of any car they tested -- 27 hp at a steady 55 mph IIRC. So I reckon you're not too far out here. The earlier numbers were grossly large. >70 46.1 >80 66.4 >90 92.2 -- David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage," '85 GL "Poor Relation"
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