What became known as the Forssman Triplane, or incorrectly as the Mannesmann (Poll) bomber, was conceived in 1917 as a way to reach the North American continent. The German Navy showed interest in the design and had the entire project moved to the Mannesmann Werke in Koln-Westhoven in spring 1918 and Mannesmann received financing from Deutsche Bank to continue the project.
Construction of the bomber ran into numerable problems due to its size, weight, engine power needed, and because airframe materials were not always available. When finished, the Triplane would have stood as tall as a four story building, with a middle wingspan of 165 feet and a fuselage length of 150 feet. The aircraft would be unarmed, except for the bomb load, and was expected to fly for 80 hours with a crew of four or five, using ten 260 hp Mercedes or Maybach engines paired back to back on the middle wing, and below the fuselage on the bottom wing. With its forty-eight thousand pound fuel load,
this would have given it the range and endurance to fly the Atlantic, bomb New York City, and then get back to Germany before the tanks ran dry. Of course, headwinds and assorted other variables may have made it impossible. But in 1918, it appeared to be feasible enough to the German military machine, so its development continued through the summer and fall.
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