Quote:
Originally Posted by akashic
I'd like to suggest trying a set of comparisons between cab extensions but without the tonneau, and maybe with a partial tonneau. I have a suspicion that the reason a partial tonneau can outperform a full tonneau is that a full tonneau eliminates the "box" that would otherwise support the stationary vortex, i.e. "bubble". Maybe messing with that bubble will get you the results that have mysteriously evaded you. Worth a try?
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Thanks for the advice
I agree - the tonneau is part of the problem somehow
but my temp setup uses the tonneau for support - note sand bags to hold the foam down
and I really like the covered bed - I may just have to make a full aero shell
I may make the third generation into something more like what you have
the second gen worked better when I cut it shorter