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pressure
"A half-tonneau - one that covers the back half of the bed (GM' US Patent 4,573,730 ) - was more effective in reducing drag than the full tonneau.It did so by relieving even more pressure on the front of the tailgate."
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*1/2-tonneau drag reduction------------------ delta-Cd 0.044
*1/2-tonneau with bulkhead ------------------ delta-Cd 0.039
*Drag penalty due to bulkhead ---------------- 12.8%
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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