You'd have to mount it up above the cab - the wind in the back of the
truck won't be parallel to the top and bottom surfaces. It blows off
the back and curves down around the back and blow around and eddy and
turbulate and all that. 'Course, so will real wind.

Mount the contraption firmly, though, and it won't flop around.

(Wright1902Glider) wrote in message ...
Well, the redneck school of engineering recomends that you make a quick
prototype out of poster board/foam board/sheet metal/whatever. Then mount the
sucker in the back of a pickup truck, as it would hang normally, making sure
that its in the free-air stream.

To test, start driving and watch the rear-view mirror. That should answer most
of your questions real quick.

Just a thought,
Harry "10 tie-downs ain't enough" Frey
Wright Brothers Enterprises
Wright 1902 glider, 1899 kite, 1878 Bat