C-5 was a hydrogen-filled C class blimp operated by the U.S. Navy in 1918 and 1919. It was part of a 10-blimp series built by Goodyear and Goodrich and was intended to capitalize upon the navy's experience operating blimps during World War I. The C-5's engines were built by Hispano-Suiza and its control car was built by Curtiss Aeroplane and Motor Company. In early May 1919 the C-5 made a pioneering flight from its home base at Cape May New Jersey to Montauk Point New York and St.