Boeing Model 2

The Boeing Model 2, also called the Model C, and its derivatives were United States two-place training seaplanes, the first all-Boeing design and the company's first financial success. Early design work began with George Conrad Westervelt in late 1915, with the first wind tunnel tests at the Massachusetts Institute of Technology in May 1916; most of the design was done by James Foley, with Wong Tsu contributing wind tunnel data analysis. A total of 56 C-type trainers were built, 55 of them with twin pontoons, while the C-1F had a single main pontoon, small auxiliary floats and a Curtiss OX-5 engine. The Model C led to Boeing's first military contract in April 1917, with the US Navy buying 51 and the Army two landplane EA versions. On 3 March 1919 Boeing and Eddie Hubbard flew the final C-700 on the first international mail delivery, carrying 60 letters from Vancouver to Seattle.