The tractor engines used two-bladed propellors, the pushers four-bladed ones. She was propelled by six steam turbines, double reduction geared, driving twin screw propellors. This combination (called the Kawasaki Ha-201) drove two, three-bladed, contra-rotating propellors. She was propelled by two steam turbines of , double reduction geared, driving twin propellors. All three were of tail-first or canard layout with rear-mounted engines and pusher propellors. To give greater clearance for the propellors, the undercarriage was lengthened. Ice forming on propellors and/or engine inlets can cause severe vibration and/or damage if ingested. Swimmers and boat propellors can become entangled. Ratier produces propellors and fan-lift engines. Their propellors were removed and tow hooks were attached to each wing leading edge. Lieutenant Chuma tried to free his submarine, however, his actions entangled its twin propellors further.