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  2. Disc brake - Wikipedia

    en.wikipedia.org/wiki/Disc_brake

    On automobiles, disc brakes are often located within the wheel A drilled motorcycle brake disc. The development of disc-type brakes began in England in the 1890s. In 1902, the Lanchester Motor Company designed brakes that looked and operated similarly to a modern disc-brake system even though the disc was thin and a cable activated the brake pad. [4]

  3. Loss of tail-rotor effectiveness - Wikipedia

    en.wikipedia.org/wiki/Loss_of_tail-rotor...

    Tail rotor vortex ring state - Wind moving in the same direction as the tail rotor moves air. With pusher tail-rotors, that is wind from the opposite side of the tail-rotor. With puller tail-rotors, that is wind from the same side as the tail rotor. For main rotors with clockwise rotation (European), that is wind from 3 o'clock.

  4. Focke-Achgelis Fa 330 - Wikipedia

    en.wikipedia.org/wiki/Focke-Achgelis_Fa_330

    In the end, they chose the Fa 330, a simple, single-seat autogyro kite with a three-bladed rotor. [1] The Fa 330 could be deployed to the deck of the submarine by two people and was tethered to the U-boat by a 150 m (490 ft) cable. [3] [2] The airflow on the rotors as the boat motored along on the surface would spin them up. The kite would then ...

  5. Anti-rolling gyro - Wikipedia

    en.wikipedia.org/wiki/Anti-rolling_gyro

    Effective ship installations require rotors having a weight of approximately 3% to 5% of a vessel's displacement. Unlike hydrodynamic roll stabilizing fins, the ship gyroscopic stabilizer can only produce a limited roll stabilizing moment that may be exceeded as the wave height increases.

  6. Flettner rotor - Wikipedia

    en.wikipedia.org/wiki/Flettner_rotor

    The Buckau, the first vehicle to be propelled by a Flettner rotor. A Flettner rotor is a smooth cylinder with disc end plates which is spun along its long axis and, as air passes at right angles across it, the Magnus effect causes an aerodynamic force to be generated in the direction perpendicular to both the long axis and the direction of airflow. [1]

  7. Aviation-capable naval vessel - Wikipedia

    en.wikipedia.org/wiki/Aviation-capable_naval_vessel

    View of a Freedom-class littoral combat ship with a Sikorsky SH-60 Seahawk helicopter on her deck A pair of MH-53E Sea Dragons sitting on the deck of a Harpers Ferry-class dock landing ship A trio of CH-53E Super Stallions on the deck of a San Antonio-class amphibious transport dock View of a Lynx HMA8 helicopter flying toward the landing pad on a Type 23 or Duke-class frigate An IAF ...

  8. Contra-rotating - Wikipedia

    en.wikipedia.org/wiki/Contra-rotating

    A Soviet Ka-32 helicopter with coaxial contra-rotating rotors, in 1989. Contra-rotating, also referred to as coaxial contra-rotating, is a technique whereby parts of a mechanism rotate in opposite directions about a common axis, usually to minimise the effect of torque.

  9. Marine propulsion - Wikipedia

    en.wikipedia.org/wiki/Marine_propulsion

    The purpose of sails is to use wind energy to propel the vessel, sled, board, vehicle or rotor. Depending on the angle of your sail it will be the difference in direction of where your boat is heading and where the wind is going. [31] Dacron was used a lot as a material for sails because of its strong, durable, and easy to maintain.

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