A tiltrotor is an aircraft which generates lift and propulsion by way of one or more powered rotors mounted on rotating shafts or nacelles usually at the ends of a fixed wing. Almost all tiltrotors use a transverse rotor design with a few exceptions that use other layouts.
The Kamov Ka-22 Vintokryl was a rotorcraft developed by Kamov for the Soviet Air Force. The experimental transport aircraft combined the capabilities of a helicopter for vertical take-off and landing with those of a fixed-wing aircraft for cruise. The Ka-22 carried a large payload, having a hold comparable in size to the Antonov An-12. Eight world records for altitude and speed were set by the Ka-22 in its class, none of which have since been broken.
The Mil Mi-2 is a small, lightly armed turbine-powered transport helicopter that could also provide close air support when armed with 57 mm rockets and a 23 mm cannon.
The Mil Mi-28 is a Russian all-weather, day-night, military tandem, two-seat anti-armor attack helicopter. It is an attack helicopter with no intended secondary transport capability, better optimized than the Mil Mi-24 gunship for the role. It carries a single gun in an undernose barbette, plus external loads carried on pylons beneath stub wings.
The Mil V-12, given the project number Izdeliye 65, is the largest helicopter ever built. The designation "Mi-12" would have been the name for the production helicopter and was not applied to the V-12 prototypes.
The Mil Mi-6, given the article number izdeliye 50 and company designation V-6, is a Soviet/Russian heavy transport helicopter that was designed by the Mil design bureau. It was built in large numbers for both military and civil roles and used to be the largest helicopter in production until Mil Mi-26 was put in production in 1980.
The Mil Mi-26 is a Soviet/Russian heavy transport helicopter. Its product code is izdeliye 90. Operated by both military and civilian operators, it is the largest and most powerful helicopter to have gone into serial production.
A helicopter main rotor or rotor system is the combination of several rotary wings and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight. Each main rotor is mounted on a vertical mast over the top of the helicopter, as opposed to a helicopter tail rotor, which connects through a combination of drive shaft(s) and gearboxes along the tail boom. The blade pitch is typically controlled by a swashplate connected to the helicopter flight controls. Helicopters are one example of rotary-wing aircraft (rotorcraft). The name is derived from the Greek words helix, helik-, meaning spiral; and pteron meaning wing.
The Mil Mi-3 was a Soviet light-utility helicopter originally designed in the 1960s as a heavier and larger version of the Mil Mi-2 helicopter. It is also a Russian designation for the Polish-Soviet co-operation on larger helicopters based on the Mi-2 that could replace the Mi-4 from 1971. The project never passed the stage of design. Due to problems in this cooperation, the Poles decided to build a completely new helicopter on their own, designated as PZL W-3 Sokół.
The Bell AH-1Z Viper is an American twin-engine attack helicopter, based on the AH-1W SuperCobra, that was developed for the United States Marine Corps as part of the H-1 upgrade program. The AH-1Z features a four-blade, bearingless, composite main rotor system, uprated transmission, and a new target sighting system. The AH-1Z, one of the latest members of the prolific Bell Huey family, is also called "Zulu Cobra", based on the military phonetic alphabet pronunciation of its variant letter.
The Boeing Vertol XCH-62 was a triple-turbine, heavy-lift helicopter project designed for the United States Army by Boeing Vertol. Approved in 1971, one prototype reached 95% completion before it was canceled in 1975. The prototype was destroyed in 2005.
The Mil V-16 was a Soviet heavy cargo/transport helicopter project of the late 1960s. The Mil V-16 was designed by Mil Design Bureau, a Moscow helicopter plant. The original scheme described a heavy side-by-side twin-rotor aircraft with two Soloviev D-25VF gas turbine engines below six-bladed rotors at the tips of heavily supported wings on each side of the fuselage and tricycle-type landing gear, with both rear landing wheels mounted below the wings while the front wheel was located below the cockpit, as well as located directly under the wings.
The Mil Mi-30 is an experimental Russian plane/helicopter that originated in 1972. The Mil Mi-30 Vintoplan was a transport aircraft that could hold up to 19 passengers or two tons of cargo; its purpose was to replace the Mi-8 and Mi-17 Helicopters. With vertical takeoff and the ability to fly like a normal plane, the Mil Mi-30 has a clear advantage over the older models.
The Mil Mi-36 was a Soviet light multipurpose helicopter first projected in the early 1980s. Its projected roles were to assist in fire support and communications, cargo transportation, SAR and medevac, and aerial surveillance. It was also planned to use twin TV-O-100 turboshaft engines, a two-bladed main rotor and a four-bladed tail rotor.
The Mil Mi-54 was a projected twin-turbine civil utility helicopter, first announced in 1992, intended to replace the Mi-2 and the Mi-8 helicopters. It was planned to use two 574 kW Saturn/Lyulka AL-32 turboshaft engines, four-bladed main and tail rotors, and fixed tricycle-type landing gear with one nosewheel and two rear wheels on sponsons.
The Mil Mi-60MAI is a three-seat light helicopter first seen as a mockup at Moscow Salon in 2001. The mockup shows a three-bladed main rotor, two-bladed tail rotor, and a skid undercarriage with rear wheels on each skid. It is planned to have one or two piston engines.
The Yakovlev Yak-100 was a single-engine, transport helicopter developed in the USSR in 1948. This was the Yakovlev Design Bureau's second helicopter.
Transverse rotor rotorcraft have two large horizontal rotor assemblies mounted side by side.
The PZL SM-4 Łątka was a prototype three-seat helicopter of the 1960s, developed by WSK PZL-Świdnik in Poland. Of largely conventional design and construction, a single prototype was built, but was not flown as a result of engine problems.
The Advanced Heavy Lifter is a large helicopter project developed by Aviation Industry Corporation of China.
