I'd call those all the wrong places and cite
aerohead (92012)
Quote:
I want to tread lightly here,but according to boundary layer theory,once critical velocity is attained,and the boundary layer is turbulent,all structures will follow the 115-degree rule,regardless as to whether they're a plane,car,or submarine.
If air,or any 'fluid' is attacking a particular curve,of any given radius,if 'zero' is the forward stagnation point,the 'fluid' MUST separate at 115-degrees of rotation beyond the stagnation point.
Example: if an analog wristwatch is moving from right to left,and the air first strikes at the 9:00 position,the air will not be able to remain attached beyond 4-seconds after 12:00.By the way,the angle at the separation point is 22-degrees.
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Not to put my own spin on holy writ, but I interpret '4-seconds after' as the second hand being at 115° (60/4=15: QED).
There is a ring of dimples that are effective on a golf ball, the others are along for the ride. Like the rear-facing ones on the tail and fenders, and in the high-pressure bubble at the base of the windshield. IOW
all of them. The doors and roof would be targets of opportunity.