So when the crankshaft rotates ... The pump is often a geroter type pump (a gear pump) meaning that a rotor spins in a pump housing and as it spins, it "meshes" with the housing.

One of the more important angles is the angle between your transmission output shaft (which is the same as the crankshaft angle ... in and out as the rear axle housing moves up and down ...

CRP Technology’s (Modena, Italy) long-term collaboration with unmanned airborne solutions developer Flying-Cam (Belgium) has resulted in the construction of the UAV Discovery’s tail rotor gear box ...