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I should have made it clearer that the myth I complained about wasIt is and it does. A knuckleball, which a slowly spinning pitch, can
the suggestion that the ball might actually be made to curve in the
opposite direction if the spin and speed were adjusted just right,
which is what I thought you were suggesting.
Leigh
do exactly that and in fact may curve in a variety of directions on
the way to the plate.
Knuckleball? This argument refers to the pathological behaviour of a
*seamless* ball, I believe. Is a knuckleball seamless? If not it makes
a poor example.
Do not misquote -- the argument is not wrong, the functional form of
Adair gives the following argument:
I'm having a copy of Adair brought in. I'll look at it.
In detail, this is wrong but then in detail the only proper way to
analyze the problem is by way of the Navier-Stokes equation and that
is not practical. So:
If Adair's argument is wrong then I see no mitigating value in making
it. I believe the equations of hydrodynamics have been found to be
quite tractable by using supercomputers. This particular problem seems
somewhat simpler than some I've heard have been integrated at NASA's
Ames Laboratory near San Jose. If that is so then it *is* practical to
analyze the problem in the proper manner.
It is interesting to note, however, that the same "faulty" wind
As far as the wind tunnel results go, I don't see how the mount on a
mounted spinning ball makes a material amount of difference.
Simple. In a wind tunnel the speed of the ball can be maintained
indefinitely and "anomalous" forces due to critical circumstances can
be similarly prolonged. A real curve ball decelerates. That's why I
asked how such a mechanism could be responsible for a reversed curve
ball. I suspect it is not a stable condition over a suitably large
range of velocities.
Leigh