The Albatros D.IV was an experimental German fighter aircraft built and tested during World War I. == Design and development == The D.IV was designed to test a geared version of the 120 kW (160 hp) Mercedes D.III engine. Unlike the ungeared version, the geared engine was completely enclosed within the fuselage.
The Albatros D.IV was an experimental German fighter aircraft built and tested during World War I. == Design and development == The D.IV was designed to test a geared version of the 120 kW (160 hp) Mercedes D.III engine. Unlike the ungeared version, the geared engine was completely enclosed within the fuselage.
Source: Wikipedia "Albatros D.IV" · CC BY-SA 4.0
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