Quote:
Originally Posted by Angel And The Wolf
Everything I've read says 15% is optimal for preventing slip stream separation You want the air to stay as close as possible to the skin to prevent turbulence
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Sorry, gotta interject, First off, this is a flat cover, so the break from cab to flat cap top will really mess up any chance of keeping it anywhere near "Attached" at 15°. Secondly, the 15° thing is the
Steepest you can be and not separate.....any thing Less....will maintain attached flow as well. Thirdly, The drag coefficient (Cd) between 5° and 15° (on an optimally shaped cap, will be within 5% of optimal.
So, As I've stated before, a 5-8° slope will yield the best results here, anything more will start to increase drag and cut into the usable space under cover.