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Contra-rotating propellers Contra-rotating propellers on the Rolls-Royce Griffon-powered P-51XR Mustang Precious Metal at the 2014 Reno Air Races. Aircraft equipped with contra-rotating propellers (CRP) [1] coaxial contra-rotating propellers, or high-speed propellers, apply the maximum power of usually a single piston engine or turboprop engine to drive a pair of coaxial propellers in contra ...
Height: 2.49 m (8 ft 2 in) Empty weight: 338 kg (745 lb) Fuel capacity: 96 litres (21 imp gal; 25 US gal) Powerplant: 1 × Rotax 912ULS four cylinder, liquid and air-cooled, four stroke aircraft engine, 75 kW (101 hp) Propellers: 3-bladed constant speed propeller; Performance. Maximum speed: 310 km/h (190 mph, 170 kn)
While it may have been designed as the fastest propeller-driven aircraft, this goal was never realized due to severe stability problems. [7] This record speed is also inconsistent with data from the National Museum of the United States Air Force, which gives a top speed of "only" 840 km/h (520 mph; 450 kn) or Mach 0.70. [8] McDonnell XF-88B
In the 1940s, NACA started researching swept propellers for use in high-speed propeller-driven aircraft. [3] Modern usage of scimitar propellers centers around turboprop and propfan engines. Since these forms of propulsion are capable of driving a propeller at transsonic or supersonic rotational speeds, as well as propelling aircraft to ...
The Republic XF-84H "Thunderscreech" is an American experimental turboprop aircraft derived from the F-84F Thunderstreak.Powered by a turbine engine that was mated to a supersonic propeller, the XF-84H had the potential of setting the unofficial air speed record for propeller-driven aircraft, but was unable to overcome aerodynamic deficiencies and engine reliability problems, resulting in the ...
[2] [3] [4] At the same time an extensive new factory, claimed to be one of the largest in the world, was laid down at Lostock, Bolton, some distance away from de Havilland's main aircraft plant at Hatfield. [5] This factory was built in only nine months as part of the government's emergency pre-war shadow-factory programme. [6]
Its 550–580 km/h (300–310 kn) cruise speed is faster than the originally expected 500 km/h (270 kn) and the power installed to achieve fast climbs should let it attain its 637 km/h (344 kn) maximum speed. When it make its first flight, a 50-seat version similar to an ATR 42 should be developed for better high-elevation performance. [9]
[2] [3] It has been estimated that building a Sling 4 requires 900-1,200 man-hours of work. The aircraft can be supplied as a kit, or built by the factory. [4] The US Aircraft Owners and Pilots Association (AOPA) tested the Sling 4 in 2016, citing a completed base price of US$123,417, rising to $192,000 with most options. [4]