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[1] [2] The plans supplier notes this warning: Vortech offers the G-1 plans as a curiosity for those interested in homebuilt helicopters because of its intriguing size and simplicity; however, Vortech has no direct experience with either the design or flight of this model and so cannot and does not endorse this as a proven aircraft.
The Helicycle helicopter is the first experimental helicopter kit in mass-production to be powered by a turbine engine, the military surplus Solar T62-T32, capable of producing 150 shaft horsepower. The engine is limited to 95 horsepower due to torque limits on the main gearbox and rotor system.
The prototype of the one-man open framework homebuilt helicopter powered by a 34 hp (25 kW) Triumph motorcycle engine. Hobbycopter 101 Production version of the XH-1 offered as a kit for $900, or as plans for $35 to homebuilders. Hobbycopter 102 Strengthened Model 101 with 34 hp (25 kW) Triumph and a fibre-glass cockpit enclosure.
The D-255 was planned to be a purpose-built attack helicopter based on the UH-1B airframe and dynamic components with a new, slender airframe and a two-seat, tandem cockpit, featuring a grenade launcher in a ball turret on the nose, a 20 mm belly-mounted gun pod, and stub wings for mounting rockets or SS.10 anti-tank missiles. [2]
The nose turret could rotate +/- 100° from the aircraft's centerline and could mount either a 40 mm (1.57 in) grenade launcher, or a 7.62 mm (0.308 in) minigun. The belly turret included a 30 mm (1.18 in) automatic cannon with 360° of rotation. Mechanical stops prevented the belly turret from aiming at any part of the helicopter. [26]
The Bell Boeing Quad TiltRotor (QTR) is a proposed four-rotor derivative of the Bell Boeing V-22 Osprey developed jointly by Bell Helicopter and Boeing.The concept is a contender in the U.S. Army's Joint Heavy Lift program (a part of Future Vertical Lift program).
It was the first light commercial twin-turbine helicopter developed in the United States. [ 4 ] The Bell 222 incorporated a number of advanced features, including dual hydraulic and electrical systems, sponsons housing the retractable landing gear , and the Noda Matic vibration reduction system developed for the Bell 214ST .
Planes built from metal use similar techniques to more conventional factory-built aircraft. They can be more challenging to build, requiring metal-cutting, metal-shaping, and riveting if building from plans. "Quick-build" kits are available which have the cutting, shaping, and hole-drilling mostly done, requiring only finishing and assembly.