The Mikoyan-Gurevich I-250, aka MiG-13, was a Soviet fighter aircraft developed as part of a crash program in 1944 to develop a high-performance fighter to counter German turbojet-powered aircraft such as the Messerschmitt Me 262. The Mikoyan-Gurevich design bureau decided to focus on a design that used something more mature than the jet engine, which was still at an experimental stage in the Soviet Union, and chose a mixed-power solution with the VRDK motorjet powered by the Klimov VK-107 V12 engine. While quite successful when it worked, with a maximum speed of 820 km/h (510 mph) being reached during trials, production problems with the VRDK fatally delayed the program and it was canceled in 1948 as obsolete.
The Bell X-22 is an American V/STOL X-plane with four tilting ducted fans. Takeoff was to selectively occur either with the propellers tilted vertically upwards, or on a short runway with the nacelles tilted forward at approximately 45°. Additionally, the X-22 was to provide more insight into the tactical application of vertical takeoff troop transporters such as the preceding Hiller X-18 and the X-22's successor, the Bell XV-15. Another program requirement was a true airspeed in level flight of at least 525 km/h.
The Hughes XH-17 "Flying Crane" was the first helicopter project for the helicopter division of Hughes Aircraft Company. The XH-17, which had a two-bladed main rotor system with a diameter of 134 feet, still holds the world record for flying with the largest rotor system. It was capable of flying at a gross weight of more than 50,000 pounds (23,000 kg), but proved too inefficient and cumbersome to be mass-produced beyond the prototype unit.
The Zenith STOL CH 701 and CH 750 are a family of light, two-place kit-built STOL aircraft designed by Canadian aeronautical engineer Chris Heintz through his Midland, Ontario, based company, Zenair. The CH 701 first flew in 1986 and the design is still in production. The CH 750 was first introduced in 2008. The CH 701 was later developed into the four-place Zenith STOL CH 801.
The Burnelli CBY-3 Loadmaster is an unconventional transport aircraft that was designed by American engineer Vincent Burnelli and built in Canada in 1944 by Canadian Car and Foundry.
The General Aircraft G.A.L.38 Fleet Shadower was a British long-range patrol aircraft design of the immediate pre-Second World War period. The Fleet Shadower was a highly specialized aircraft intended to follow enemy naval task forces over long times and radio back position information. However, the concept produced an ungainly and ultimately unsuccessful type. The Airspeed Fleet Shadower, built to the same requirement and of broadly similar appearance, also did not progress past the prototype stage.
The Urban Aeronautics X-Hawk is a proposed flying car designed by Rafi Yoeli in Yavne, Israel, being built by Metro Skyways Ltd., a subsidiary of Yoeli's privately held company, Urban Aeronautics. The firm claims to have flown the car to a height of 90 cm (3 ft), and that greater heights are possible. The X-Hawk and its smaller unmanned version, the Tactical Robotics Cormorant, would be used in search and rescue operations where a helicopter would be useless, or at least very dangerous, such as evacuating people from the upper stories of burning buildings, or delivering and extracting police and soldiers while very close to structures, narrow streets, and confined spaces, with a projected size similar to that of a large van.
The Eagle AC-7 Eagle 1 is an aircraft that was manufactured by Windecker Industries. It was the first composite airplane to receive FAA certification in December 1969 at a reported development cost of US$20,000,000. The fiberglass process was named "Fibaloy" by Windecker.
The Martin Jetpack was a single-person aircraft under development. Despite its name, it did not use a jet pack as such, but ducted fans for lift. Martin Aircraft Company of New Zealand developed it, and unveiled it at the Experimental Aircraft Association's 2008 AirVenture in Oshkosh, Wisconsin, US. The US Federal Aviation Administration classified it as an experimental ultralight airplane.
The Aerial Reconfigurable Embedded System (ARES) was a concept for an unmanned VTOL flight module that can transport various payloads. The concept started as the TX (Transformer) in 2009 for a terrain-independent transportation system centered on a ground vehicle that could be configured into a VTOL air vehicle and carry four troops. ARES' primary function was the same as TX, to use flight to avoid ground-based transportation threats like ambushes and IEDs for units that don't have helicopters for those missions. It was to be powered by twin tilting ducted fans and have its own power system, fuel, digital flight controls, and remote command-and-control interfaces. The flight module would have different detachable mission modules for specific purposes including cargo delivery, CASEVAC, and ISR. Up to 3,000 lb (1,400 kg) of payload would be carried by a module.
The Belite Superlite, originally the product of Belite Aircraft, is a single-seat, high-wing, single-engine ultralight aircraft developed from the Kitfox Lite aircraft especially for the United States FAR 103 Ultralight Vehicles category.
The Diamond DA62 is a five- to seven-seat, twin-engine light aircraft produced by Diamond Aircraft Industries and first announced in March 2012.
The Procaer Cobra was a two-seat turbojet powered light aircraft designed and built in Italy and flown in the early 1960s. Only one was completed.
The Samson Switchblade is an American amateur-built roadable aircraft, under development by Samson Motorworks of Meadow Vista, California. It was publicly introduced at AirVenture in 2009 in mock-up form. The aircraft is intended to be supplied as a kit for amateur construction initially and possibly as a complete ready-to-fly-aircraft in the future.
The V-STOL Super Solution 2000 is an American STOL homebuilt aircraft that was designed by Dick Turner and produced by V-STOL Aircraft Corporation of Fort Myers, Florida. When it was available the aircraft was supplied as a kit for amateur construction.
The Skyship 500 is a non-rigid airship designed and built in the United Kingdom during the 1980s.
The Tactical Robotics Cormorant, formerly AirMule or Mule, Israel Defense Forces (IDF) codename Pereira, is a flying car unmanned aerial vehicle (UAV) built by Tactical Robotics Ltd., a subsidiary of designer Rafi Yoeli's Urban Aeronautics Ltd., in Yavne, Israel. It will be used in search and rescue operations where it is too dangerous or inaccessible for a helicopter, such as evacuating people from the upper stories of burning buildings, or delivering and extracting police and soldiers while very close to structures, narrow streets, or through holes into confined spaces.
The Coelho AC-11 is a Brazilian homebuilt aircraft that was designed and produced by Altair Coelho of Eldorado do Sul and introduced in 1994. The aircraft was intended to be supplied as a kit for amateur construction, but only one was completed.
The Aeroprakt A-32 is a Ukrainian two-seat, high-wing, tricycle gear ultralight aircraft that was designed by Yuri Yakovlev and is manufactured by Aeroprakt. In Australia the A-32 is referred to as the Vixxen.
The Vega Model 2 Starliner was a prototype five-seat feeder airliner produced by the Vega Airplane Company, a subsidiary of Lockheed. It was designed to be powered by an unusual powerplant, consisting of two Menasco piston engines coupled together to drive a single propeller. A single example was built, flying in 1939, but no production followed.
