Prime mover

Prime mover may refer to:

Engineering

Prime mover, a machine that converts energy from natural sources, into mechanical energy.

Prime mover (locomotive), a component of a locomotive

A tractor unit, a heavy-duty towing engine that serves as a "prime mover" providing motive power for hauling a towed or trailered load, including:

Artillery tractor, a military vehicle for hauling an artillery piece
Ballast tractor, a heavy haulage road or off-road vehicle designed to pull or push heavy or exceptionally large loads using a drawbar
Heavy hauler, a large transporter for moving oversize loads too large for road travel without an escort and special permit
Steam tractor, a vehicle powered by a steam engine which is used for pulling
Tractor, a vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, often in agricultural and construction applications

Artillery tractor, a military vehicle for hauling an artillery piece

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