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
Arthur W. Coolidge Theta Delta Chi. In 1951 he was elected as a member of the Massachusetts Society of the Sons of the American Revolution. A fourth cousin to President Calvin Coolidge, he had one daughter, Dorothy Coolidge Cox and two sons: Robert Tilton Coolidge (1915–1955) and Arthur William Coolidge II. One of his grandchildren is film director Martha Coolidge. He was brother of Massachuestts politician Richard B. Coolidge. Coolidge died at his home in Boston and is buried in Forest Glen Cemetery, Reading, Massachusetts. The Arthur W. Coolidge Middle School, formerly Junior High School, was named in his honor. Arthur W. Coolidge