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2. Radio-controlled helicopter - Wikipedia

   en.wikipedia.org/wiki/Radio-controlled_helicopter

   90 size : Engine 0.9 cubic inch, Main Blades 690-710mm; Modern RC helicopters are generally classed by the length of the main blades (with few exceptions). Common classes are: Micro (under 200mm main blades) Mini (240-420mm blades) - classically called 300–450. 500 (425-500mm) 600 (600mm) 700 (standard competition size) 800

3. Helicopter rotor - Wikipedia

   en.wikipedia.org/wiki/Helicopter_rotor

   These blade pitch variations are controlled by tilting, raising, or lowering the swash plate with the flight controls. The vast majority of helicopters maintain a constant rotor speed (RPM) during flight, leaving the angle of attack of the blades as the sole means of adjusting thrust from the rotor. The swash plate is two concentric disks or ...

4. Swashplate (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Swashplate_(aeronautics)

   Linkages (silver) to the rotor blade In aeronautics , a swashplate is a mechanical device that translates input via the helicopter flight controls into motion of the main rotor blades . Because the main rotor blades are spinning, the swashplate is used to transmit three of the pilot's commands from the non-rotating fuselage to the rotating ...

5. Helicopter flight controls - Wikipedia

   en.wikipedia.org/wiki/Helicopter_flight_controls

   Increase/decrease pitch angle of all main rotor blades equally, causing the aircraft to ascend/descend Increase/decrease torque. In some helicopters the throttle control(s) is a part of the collective stick. Rotor speed is kept basically constant throughout the flight. To adjust power through rotor blade pitch setting

6. Cyclic/collective pitch mixing - Wikipedia

   en.wikipedia.org/wiki/Cyclic/collective_pitch_mixing

   To reduce the mechanical complexity, newer model helicopters use a software system (usually running on the transmitter) to mix the control inputs of three interdependent servos to control the swashplate. [2] The three servo linkages are arranged around the swashplate at 120° intervals (there is a variation that uses 140° + 140° + 80 ...

7. BERP rotor - Wikipedia

   en.wikipedia.org/wiki/BERP_rotor

   The initial BERP rotor blades were developed in the late 1970s to mid-1980s as a joint venture programme between Westland Helicopters and the Royal Aircraft Establishment (RAE), with Professor Martin Lowson as a co-patentee. [1] The goal was to increase the helicopters lifting-capability and maximum speed using new designs and materials.