aerohead -
Quote:
Originally Posted by aerohead
I think they are lowering both the leading and trailing edges rather than raising the roofline.Daimler-Benz is too smart to believe adding frontal area could benefit drag.Trailer flow is typically fully attached with conventional trailer design.Their 95-square-foot wake is the issue which lowering would address.------------ PS "teardrop" is used out of context,as in a real teardrop form,the sides would be converging in direct proportion to the drop of the roof.
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They are claiming "10% additional load space", so I think it is bigger on the whole. They are also stating bigger frontal area here :
Increased Load Space And The Effect on Aerodynamics
Code:
STANDARD TEARDROP
TRAILER TRAILER % VARIANCE
Speed 56mph
(constant m/s) 25.03 25.03
Cd: Drag
Coefficient
(est) 0.7 0.4 -42.86
Width 2.55 2.55
Height 4.0 4.5
Frontal Area 10.2 11.48 12.5
Fd
(Force of drag) 2,742.08 1,762.77 -35.71
In terms of practicality, I think this is a "from land-to land" design. It' won't work on container ships and double-decked trains can only allow them on the "top bunk", so to speak.
CarloSW2