

| Subject: | Re: � � � Re: aerodynamics, was: 101 MPH Vanagon! |
| From: | jimt |
| Date: | Mon, 18 Oct 2004 13:19:54 -0600 |
Thankyou thankyou for that westy number. I was just banging my head to a pulp trying to calculate the difference of that westy top in the squares and in the coef value. Thanks ���������������������������������������� jimt Planned insanity is best. Remember that sanity is optional. http://www.tactical-bus.info (tech info) http://www.westydriver.com > Alistair, > > Greetings from Yungay Station, Antofagasta, Chile with relative humidity of > 1.1 to 4.2%! > > Some numbers! The drag coefficient (Cd) and frontal area (A) for the regular > Vanagon are 0.45 and 3.06 m2; > > for the later Vanagon with front spoiler lip,the values are: 0.44 and 3.08 > m2; > > for the Westfalia, the numbers are 0.52 and 3.17 m2; > > the later Westfalia with spoiler drops the drag coefficient to 0.51. > > The European hightop camper (Dehler profile) takes the drag coefficient to > 0.40 with a frontal area of 3.61 m2. > > So highest drag for the Westfalia and the Euro hightop has essentially the > same drag as the regular passenger version. > > BTW, I have info somewhere that the drag coefficient for the syncros is > higher by about 0.03 but I can't place my hands on those notes just now. > > > Frank (Grunthaner) > > This data comes from VW factory wind tunnel tests, conducted as they worked > out the optimal gearing for the various powerplant combinations. > > Pleased to see some technical discussion on the list! > > > Frank Grunthaner > >
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