Quote:
Originally Posted by ccrider
here is some pics of the frame work of my aerocap. this is with a 9" drop from cab to tailgate. which calculates out to a 11.25 degree angle. i am thinking of putting a piece of wood in the center of the span so it makes it a little rounded. any suggestions? should i make change the angle steeper? it seems like most guys making them are making the angles steeper.
i am going to get it all framed out then put 1/2" plywood over the top
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If you have an abrupt angle,you will lose boundary layer adhesion immediately,flow will separate,and there is a chance you'll have a violent buffeting,enough to "explode" your shell if not robust enough.
Please take a look at Metro's Permanent Kammback for Metro thread,or the Aerodynamic Streamlining Template thread.
You'll notice that the roofline begins with a subtle curvature,increasing with length.
Get a 20-foot length of 1-inch PVC pipe,lay it over the cab and study the curvature as it bends down toward the tailgate.