Albatros L 73
The Albatros L 73 was a twin-engine, out blank as a biplane airliner of the Berlin Albatros Flugzeugwerke from the 1920s. It became known as " sleeper airplane."
History
Albatros began in 1926 with the development of a suitable for night flying passenger aircraft. It was a closed cabin with eight seats that could be converted into four beds. To reduce drag, fuselage and engine nacelles were designed boat-shaped.
As drive various BMW engines that were between the upper and lower wing served. The first two aircraft were initially Junkers L 5 engines, but were converted to 1928 on BMW Va engines.
The first flight of the L 73 was performed in 1926 instead, from the following year, she served the night between Berlin and Königsberg. Later, the routes from Berlin came to Vienna and Malmö so.
All four built machines were first owned by the Luft Hansa. The D -961 crashed near Brandenburg Babekuhl on 28 May 1928. Two aircraft sold Luft Hansa in 1931 to Bulgaria, the fourth, the D -960 Prussia, was put out of service in 1932 and left in 1933 the German Experimental Institute for Aviation.