Capability and willingness are two very different things. Anybody can dance, though you could spend your lifetime unsuccessfully trying to convince them of that. - Mr. Pockets [more]
This white paper, written by one of FRC Team #1640's mentors, A.A. Koenig, Ph.D., analyzes the physics of a ball launcher with a two-wheel configuration.
Capability and willingness are two very different things. Anybody can dance, though you could spend your lifetime unsuccessfully trying to convince them of that. - Mr. Pockets [more] 
