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This is a list of soaring birds, which are birds that can maintain flight without wing flapping, using rising air currents. Many gliding birds are able to "lock" their extended wings by means of a specialized tendon. [1] Bird of prey. Buzzards; Condors; Eagles; Falcons; Harriers; Hawks; Kites; Osprey; Secretary bird; Vultures; Passerine ...
The manager of the project, Albion Bowers, said that the aircraft is based on the flight of a bird. [ 5 ] The Prandtl-D No. 3 first flew Oct. 28, 2015, with double the wingspan of the earlier versions, [ 4 ] however, through development, the team managed to reduce the final glider's drag by 11%.
The aircraft is of wooden structure, covered in fiberglass. The 50.7 ft (15.45 m) span wing employs a Wortmann FX 05-191 airfoil and features dive brakes . The aircraft takes its name from its distinctive T-tail, which was an unusual design feature when the aircraft design process was started.
With 18 m (59 ft) span wings it is fully certified for aerobatics (+7 -5 g); with a 20 m (66 ft) span wings it is certified for limited aerobatics (+5 -2.65 g). The engine (DG1000T) is mounted on a pylon aft of the double cockpit. There is a reduction gear (2.3:1.0) between the engine and the two-blade carbon-fibre composite propeller.
The aircraft is of mixed construction, with a welded steel tube fuselage covered in doped aircraft fabric covering, wooden framed tail surfaces covered in fabric and wooden wings. The 17.0 m (55.8 ft) span wing uses a NACA 63-616 airfoil at the wing root , changing to a NACA 63-614 section at the wing tip .
The 32-metre (105 ft) wingspan, 42-kilogram (93 lb) aircraft was constructed from carbon fibre, balsa, and foam. The pilot sat in a small cockpit suspended below the wings and pumped a bar with his feet to operate a system of wires that flapped the wings up and down.