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2. Marine propulsion - Wikipedia

   en.wikipedia.org/wiki/Marine_propulsion

   The rotating crankshaft can be directly coupled to the propeller with slow speed engines, via a reduction gearbox for medium and high speed engines, or via an alternator and electric motor in diesel-electric vessels. The rotation of the crankshaft is connected to the camshaft or a hydraulic pump on an intelligent diesel.

3. Outboard motor - Wikipedia

   en.wikipedia.org/wiki/Outboard_motor

   These motors typically use a manual start system, with throttle and gearshift controls mounted on the body of the motor, and a tiller for steering. The smallest of these weigh as little as 12 kilograms (26 lb), have integral fuel tanks, and provide sufficient power to move a small dinghy at around 8 knots (15 km/h; 9.2 mph) This type of motor ...

4. Sterndrive - Wikipedia

   en.wikipedia.org/wiki/Sterndrive

   The outdrive resembles the bottom half of an outboard motor and is composed of two sub-units: an upper containing a driveshaft connected through the transom to an engine which transmits power to a 90-degree-angle gearbox; and the lower containing a vertical driveshaft receiving power from the upper unit gearbox, transmitted through another 90 ...

5. Cross-drive steering transmission - Wikipedia

   en.wikipedia.org/wiki/Cross-drive_steering...

   A later design of cross-drive transmission, the Allison X1100, was used in the 1970s experimental US MBT-70 and XM1 [3] tanks, then later adopted in the M1 Abrams.This adopts a different principle for the steering cross-coupling: instead of a hydro-dynamic torque converter, it uses a hydrostatic combination of a hydraulic pump and a hydraulic motor.

6. Rudder - Wikipedia

   en.wikipedia.org/wiki/Rudder

   Boat rudders may be either outboard or inboard. Outboard rudders are hung on the stern or transom. Inboard rudders are hung from a keel or skeg and are thus fully submerged beneath the hull, connected to the steering mechanism by a rudder post that comes up through the hull to deck level, often into a cockpit.

7. Legendary driver Mary McGee, profiled in film 'Motorcycle ...

   www.aol.com/legendary-driver-mary-mcgee-profiled...

   Born in Juneau, Alaska, McGee spent her childhood in Iowa and began racing cars before gaining fame on two wheels. She was the first woman to compete in motorcycle road racing and motocross events ...