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  2. Quadcopter - Wikipedia

    en.wikipedia.org/wiki/Quadcopter

    A quadcopter, also called quadrocopter, or quadrotor [1] is a type of helicopter or multicopter that has four rotors. [ 2 ] Although quadrotor helicopters and convertiplanes have long been flown experimentally, the configuration remained a curiosity until the arrival of the modern unmanned aerial vehicle or drone.

  3. List of rotorcraft manufacturers by country - Wikipedia

    en.wikipedia.org/wiki/List_of_rotorcraft...

    Rotorcraft manufacturers fall into two categories: . those that can design, certify and manufacture new designs from scratch and; those that can only manufacture extant designs under license.

  4. Hubsan X4 - Wikipedia

    en.wikipedia.org/wiki/Hubsan_X4

    The H502E, also marketed as the "H502E X4 DESIRE CAM" is a smaller version of the H501S quadcopter. Uses brushed motors, has 12 minutes' flight time, 7.4V (2S) 610 mAh Li-Po battery, GPS Positioning, altitude hold, 720P High Definition Camera and return to home. Includes the standard TX H907A remote, extra props, USB charger and a tiny screwdriver.

  5. Coaxial-rotor aircraft - Wikipedia

    en.wikipedia.org/wiki/Coaxial-rotor_aircraft

    A Ukrainian Navy Kamov Ka-27. A coaxial-rotor aircraft is an aircraft whose rotors are mounted one above the other on concentric shafts, with the same axis of rotation, but turning in opposite directions (contra-rotating).

  6. Jetson One - Wikipedia

    en.wikipedia.org/wiki/Jetson_One

    The ultralight will be powered by high discharge lithium-ion batteries and by eight electric motors which generate 102 horsepower. [6] [5] Battery powered flight time is limited to 20 minutes and there is a top speed of 63 mph (101 km/h). [5] The vehicle comes with a charger which can recharge in one hour at 230/240V or two hours with 110V power.

  7. Ward's 10 Best Engines - Wikipedia

    en.wikipedia.org/wiki/Ward's_10_Best_Engines

    Wards 10 Best Engines is an annual list of the ten "best" automobile engines available in the U.S. market, that are selected by Wards AutoWorld magazine. The list was started in 1994 for model year 1995, and has been drawn every year since then, published at the end of the preceding year.

  8. Multirotor - Wikipedia

    en.wikipedia.org/wiki/Multirotor

    DJI Phantom 1 drone. A multirotor [1] or multicopter is a rotorcraft with more than two lift-generating rotors.An advantage of multirotor aircraft is the simpler rotor mechanics required for flight control.

  9. Helicopter rotor - Wikipedia

    en.wikipedia.org/wiki/Helicopter_rotor

    An advantage of quad rotors on small aircraft such as drones is the opportunity for mechanical simplicity. A quadcopter using electric motors and fixed-pitch rotors has only four moving parts. Pitch, yaw and roll can be controlled by changing the relative lift of different rotor pairs without changing total lift. [32] The two families of ...