Junkers G.38 was a large en.wikipedia.org/wiki/Germany four-engined transport aircraft which first flew in 1929.http://en.wikipedia.org/wiki/Junkers_G.38#cite_note-EADS-0Two prototypes were constructed in Germany. Both aircraft flew as acommercial transport within Europe in the years leading up to en.wikipedia.org/wiki/World_War_II . The G.38 carried a crew of seven. On board mechanics were able to service the engines in flighthttp://en.wikipedia.org/wiki/Junkers_G.38#cite_note-EADS-0due to the G.38's en.wikipedia.org/wiki/Blended_wing_body design which provided access to all four power plants.The first Junkers prototype - 3301 and marked as D-2000 - first flew on 6 November 1929 with four en.wikipedia.org/wiki/Diesel_engine : two L55 12-cylinder V-motors and two 294 kW L8 6-cylinder inline motors with combined power rating of 1470 kW (1971 hp) en.wikipedia.org/wiki/Junkers_G.38#cite_note-j-2The en.wikipedia.org/wiki/Reich_Air_Ministry purchased the D-2000 for demonstration flights, en.wikipedia.org/wiki/Junkers_G.38#cite_note-3and took delivery on 27 March 1930. In flight tests, the G.38 set fourworld records including speed, distance and duration for airplaneslifting a 5000 kg payload.http://en.wikipedia.org/wiki/Junkers_G.38#cite_note-EADS-0 On 2 May 1930 Lufthansa put the D-2000 into commercial service for both scheduled and chartered flights.On 2 February 1931 the Leipzig-based Junkers' yard re-engined theD-2000 with two L8 and two L88 motors giving a total power rating of1764 kW (2366 hp) and increasing passenger capacity from 13 to 19http://en.wikipedia.org/wiki/Junkers_G.38#cite_note-j-2The G.38, during its early life, was the largest land plane in the world.http://en.wikipedia.org/wiki/Junkers_G.38#cite_note-EADS-0Passenger accommodation was sumptuous by today's standards and was meant to rival that found on the competing en.wikipedia.org/wiki/Zeppelin service offered by The plane was unique in that passengers were seated in the wings, which were 1.7 m (5 ft 7 in) thick at the root.http://en.wikipedia.org/wiki/Junkers_G.38#cite_note-T.26N-4There were also two seats in the extreme nose. The leading edge of eachwing was fitted with sloping windscreens giving these passengers theforward-facing viewhttp://en.wikipedia.org/wiki/Junkers_G.38#cite_note-EADS-0usually available only to pilots. There were three 11 seater cabins, plus smoking cabins and wash rooms.