THE Hamburger Ha‐139 is an all‐metal, four‐engined, twin‐float seaplane recently built in Hamburg to meet the requirements of the Deutsche Lufthansa for transatlantic mail service. It was designed and built by the Hamburger Flugzeubau G.m.b.H., who are a new aviation department of Blohm and Voss, the well‐known shipbuilders of Hamburg. The company was formed in 1933 with Dr. Richard Vogt as Director and has in the past built several training machines ; the new Ha‐139 being the largest and most important machine built up to the present time. The seaplane has a gross weight of 16 tons and a range of 5,000 kilometres (3,100 miles) at its cruising speed of 250 k.p.h. (155 m.p.h.). The four engines give a total of 2,400 h.p.
(1937), "A Seaplane for the Atlantic: The Big Four‐Engined 2,400 h.p. Twin‐Float Sixteen‐Ton Hamburger Seaplane", Aircraft Engineering and Aerospace Technology, Vol. 9 No. 5, pp. 136-136. https://doi.org/10.1108/eb030180
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