Albatros L.71
type of aircraft
The Albatros L.71 was a two-seat, single pusher engined biplane built in Germany in the 1920s.
Design and development
Flight described the L.71 as a flying boat on wheels because, in the 1920s, such aircraft were almost the only modern pusher biplanes. Visually, the most unusual feature was the extreme stagger, introduced to optimise the view for each of the occupants of its tandem cockpits. Both wings had spruce spars, continuous from tip to tip, and spruce ribs. The larger upper wing had no dihedral but carried the ailerons; the lower wing had 1.5° of dihedral. Outward leaning, aluminium tube N-form interplane struts braced the wings but there was none of the usual flying wire bracing in the single bay; the wings were aerodynamically quite thick, allowing them to be internally braced cantilevers. The upper wing centre section was supported by a shorter pair of outward leaning N struts from the upper fuselage. Though the lower plane was set at mid-fuselage the interplane gap was large, to provide clearance for the two blade propeller.
The pusher configuration 55 hp (41 kW) Siemens-Halske Sh 10 five cylinder radial was aerodynamically faired into the upper wing trailing edge but was not structurally connected to it; instead, four tubes from the fuselage formed the engine mounting. The fuel tank was within the forward section of the upper wing, feeding the engine by gravity with some pressure assistance.
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