SS President Coolidge Newport News, Virginia built the two ships, completing "President Hoover" in 1930. The keel for "President Coolidge" was laid 22 April 1930 and the ship was delivered 1 October 1931. They were the largest merchant ships built in the United States up to that time. Each ship had turbo-electric transmission, with a pair of steam turbo generators generating current that powered propulsion motors on the propeller shafts. Westinghouse built the turbo generators and propulsion motors for "President Coolidge" but General Electric built the turbo generators and propulsion motors for "President Hoover". In the "President Coolidge" twelve Babcock & Wilcox superheater
John Coolidge of the United States. He was an executive with the New York, New Haven and Hartford Railroad. He served as president of the Connecticut Manifold Forms Company until 1960, when he reopened the Plymouth Cheese Corporation in Plymouth at the historic village. He helped start the Coolidge Foundation and his gifts of buildings, land, and artifacts were instrumental in creating the President Calvin Coolidge State Historic Site. Well into his 80s, Coolidge was seen shuttling back and forth from his home near the Calvin Coolidge Historical Site to collect his mail at the old post office located on the historic