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2. Helicron (automobile) - Wikipedia

   en.wikipedia.org/wiki/Helicron_(automobile)

   The Helicron is an open-wheel car that used a propeller as its drive. The Helicron was abandoned in the late 1930s, but was restored after its barn find in 2000. [1] In the same year, the car was permitted by the French government to drive on the French roads. [2] The car currently resides in the Lane Motor Museum and is on display, as a ...

3. Two-wheel drive - Wikipedia

   en.wikipedia.org/wiki/Two-wheel_drive

   A two-wheel-drive bicycle with the front wheel propelled by the arms and the rear wheel by the legs (demonstrated by its Dutch inventor on Polygoon, 1942). For two-wheeled vehicles such as motorcycles and bicycles, the term is used to describe vehicles that can power the front as well as the back wheel.

4. Rim-driven thruster - Wikipedia

   en.wikipedia.org/wiki/Rim-driven_thruster

   The rim-driven thruster, also known as rim-driven propulsor/propeller (or RDP) is a novel type of electric propulsion unit for ships. The concept was proposed by Kort around 1940, but only became commercially practical in the early 21st century due to advances in DC motor controller technology. [ 1 ]

5. Quadcopter - Wikipedia

   en.wikipedia.org/wiki/Quadcopter

   Among the designs he tried was the Oehmichen No. 2, which employed four two-blade rotors and eight propellers, all driven by a single engine. The angle of the rotor blades could be varied by warping. Five of the propellers, spinning in the horizontal plane, stabilized the machine laterally. Another propeller was mounted at the nose for steering.

6. Human-powered aircraft - Wikipedia

   en.wikipedia.org/wiki/Human-powered_aircraft

   A human-powered aircraft (HPA) is an aircraft belonging to the class of vehicles known as human-powered transport.. As its name suggests, HPAs have the pilot not only steer, but power the aircraft (usually propeller-driven) by means of a system similar to a bicycle or tricycle: a pair of pedals, moved by the pilot's feet that turns a gear, which then moves a bicycle chain, which then rotates a ...

7. Electric bicycle - Wikipedia

   en.wikipedia.org/wiki/Electric_bicycle

   The bicycle wheel hub is the motor. The power levels of motors used are influenced by available legal categories and are often, but not always limited to under 750 watts. With a front-drive the motor sits in the front hub, and with a rear-drive the motor sits in the rear hub.