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The exact size and position of the sprue will make a big difference on how and how much air impacts it because the ball is a sphere....
Over time I think the sprue will migrate into the burble. but not before it hits the target..
It has to fight so many forces.
Inertia put it on a fixed path that must be overcome...
The highest and lowest points of pressure are directly opposite of each other...this wants to keep the ball stationary along it axis..
the next highest point of pressure is likely opposite of the sprue.
If you closely examine the air currents moving over the ball you can see the place where the ball sprue would be least affected..
HOWEVER!..... we are leaving out one very important factor.....Supersonic flight :hmm: