Quote:
Originally Posted by tru
any ideas on what optimum length of partial cover would be?
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The optimum length is a full cover
If it has to be a partial one, cover at least the rear half of the truck's bed.
Adding a wing / extending the roofline combined with that partial cover, will work even better.
You don't want a wing that stick up above the roof, or kicks the air upwards though - that'll increase drag.