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Old 09-09-2012, 10:20 AM   #10 (permalink)
Sven7
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Boo Radley - '65 Ford F100
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Okay.

US Pat 4,573,730. 4 Mar 1986

Chevrolet C-10 tested with different length half-tonneaus. 50% of bed length gives greatest benefit at ~0.045 Cd reduction. For other trucks it may vary- other lengths of 40-60% may suffice. The illustration shows not only the half-tonneau on the rear half of the bed, but a vertical piece at the front of the tonneau that boxes in that rear half.

Example not in the reading:


SAE Paper 881874, 7-10 Nov 1988

"Pickup truck drag reduction-- devices that reduce drag without limiting truck utility"

Figure 1


Full cover is rated at 0.030 Cd reduction.
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Last edited by Sven7; 09-09-2012 at 11:57 AM..
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