Multiple drum rotors could be used in a multi-spool design.

Pressurized oil enters the center of the housing and passes into a drum rotor free to spin on a bearing and seal.

Drum rotor (AT41 for F510) Suitable for all kinds of rotary cultivation work where friable tilth is required.

With rusted chicken wire to represent the windswept dunes, pyramids of discarded sprockets, brake drum rotors and fly wheels as sculpture and defoliated succulents to illustrate the dicey terrain, his exhibit stood out.