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The FanWing is a type of aircraft rotor wing in which a horizontal-axis cross-flow fan is used in close conjunction with a fixed wing. The fan forces airflow over the fixed surface to provide both lift and forward thrust. The concept was initially developed around 1997 by designer Patrick Peebles and is under development by his company FanWing ...
The aircraft's wings and horizontal tail surfaces were taken from a Grumman American AA-1, while the vertical tail surfaces were new. [3] [4] At first the fan was ungeared, which resulted in high noise levels. The engine was replaced by a 110 kW (150 hp) engine in 1974, and considerable testing was carried out with various designs of fans and ...
The Ryan XV-5 and the F-35B use relatively smaller lift fans, either fan-in-fuselage or fan-in-wing, with very high disc loading. According to the momentum theory of the ducted fan, [ 2 ] [ 4 ] high disc loading leads to low hovering efficiency (see power vs disc loadings , JSF fan), so the F-35B can hover for only a short time, at the cost of ...
The Verticraft Verticar of 1961 was a similar single-fan, directed-thrust, all-wing (or lifting body) aircraft, of conventional but very low-aspect-ratio wing planform. It failed to fly. A tandem-fan version was proposed but never built. [5] By contrast the Ryan XV-5 Vertifan of 1964 was an otherwise conventional delta-wing jet. It had a large ...
The most common ducted fan arrangement used in full-sized aircraft is a turbofan engine, where the power to turn the fan is provided by a gas turbine. High bypass ratio turbofan engines are used on nearly all civilian airliners , while military fighters usually make use of the better high-speed performance of a low bypass ratio turbofan with a ...
The engine power setting determined the lift from the fans, as fan RPM was determined by the exhaust output from the J85 engines and the load on the fan. [2] Roll control was by differential actuation of the wing-fan exit louvers. Aircraft performance was subsonic, with delta wings superficially similar to those on the Douglas A-4 Skyhawk.
The Edgley EA-7 Optica is a British light aircraft designed for low-speed observation work, and intended as a low-cost alternative to helicopters.The Optica has a loiter speed of 130 km/h (70 kn; 81 mph) and a stall speed of 108 km/h (58 kn; 67 mph).
The Fly-Fan Shark is a Slovak light aircraft designed by Frantisek Sustek and initially developed by Fly-Fan of Trenčín. Development continues under the new owner of the design, AENEA Services. The design was introduced at the AERO Friedrichshafen show in 2007 as a mock up and in 2011 as a flying aircraft. The aircraft first flew on 29 June ...