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2. Radio-controlled helicopter - Wikipedia

   en.wikipedia.org/wiki/Radio-controlled_helicopter

   Learning to fly a collective pitch RC helicopter takes time and practice. Many modelers join a club so they can be instructed by experienced RC pilots, or follow on-line guides. [12] RC Helicopters usually have at least four controls: roll - cyclic pitch, elevator (fore-aft cyclic pitch), rudder (yaw) and pitch/throttle (collective pitch/power ...

3. Piasecki X-49 SpeedHawk - Wikipedia

   en.wikipedia.org/wiki/Piasecki_X-49_SpeedHawk

   The Piasecki X-49 "SpeedHawk" is an American four-bladed, twin-engined experimental high-speed compound helicopter developed by Piasecki Aircraft.The X-49A is based on the airframe of a Sikorsky YSH-60F Seahawk, but utilizes Piasecki's proprietary vectored thrust ducted propeller (VTDP) design and includes the addition of lifting wings.

4. Radio-controlled aircraft - Wikipedia

   en.wikipedia.org/wiki/Radio-controlled_aircraft

   RC helicopter. Radio-controlled helicopters, although often grouped with RC aircraft, are in a class of their own due to the vast differences in construction, aerodynamics and flight training. Hobbyists will often venture from planes, to jets and to helicopters as they enjoy the challenges, excitement and satisfaction of flying different types ...

5. Robinson R66 - Wikipedia

   en.wikipedia.org/wiki/Robinson_R66

   Announced in 2007, the R66 was designed to be the company's first turbine-powered product and to extend its product range to compete with larger helicopters manufactured by Bell Helicopter and Eurocopter. Most of the R66 design is based on the earlier piston-engine R44. Robinson started taking orders for the R66 in February, 2010.

6. SKT Skyrider 06 - Wikipedia

   en.wikipedia.org/wiki/SKT_Skyrider_06

   Never exceed speed: 200 km/h (124 mph, 108 kn) Endurance: 5 hours and 10 minutes; Service ceiling: 3,000 m (10,000 ft) Rate of climb: 7.5 m/s (1,480 ft/min)

7. Retreating blade stall - Wikipedia

   en.wikipedia.org/wiki/Retreating_blade_stall

   Retreating blade stall is a hazardous flight condition in helicopters and other rotary wing aircraft, where the retreating rotor blade has a lower relative blade speed, combined with an increased angle of attack, causing a stall and loss of lift. Retreating blade stall is the primary limiting factor of a helicopter's never exceed speed, V NE. [1]