>Those pics are good. I'd be inclined to make a plug to fit the empty
>luggage rack, but...
>
>I have been bitten on the ass too many times when I have come to the
>"obvious"  solution in fluid dynamics - making "largish and highish
>speed" water tunnels (around 1 m/s ) - to be adamant that that will
>smooth those streamlines.

Often a ROUGH surface aids laminar flow. This is a tactic used by
marine organisms to good effect.

Glue little warts all over your van?
--
Andrew Grebneff
Dunedin
New Zealand
Fossil preparator
<andrew.grebneff@stonebow.otago.ac.nz>
Seashell, Macintosh, VW/Toyota van nut