In a message dated 1/23/08 2:21:37 PM, tcopley@sfu.ca writes:

> Interesting data, and not hugely surprising.� The Bimmer *does* have pretty 
> good aerodynamics, and adding stuff hanging off the back is going to kill 
> those aerodynamics.
> 
T,

Exactly my point. I have described some mods to the aerodynamics of the 
Westfalia camper in the past, but wanted to note how serious small changes in 
aerodynamics can be relative to fuel economy issues at speed. For example, the 
often observed rear down bias of Westy campers could have a serious impact on 
observed economy numbers. Ergo, placement of rear spring pre-loads to get the 
Vanagon bias (as usually loaded) back to the horizontal can be justified as an 
economy measure. I use the airlift rear spring supplements to level the Vanagon 
as required, routinely.

Frank Grunthaner

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