SS President Coolidge
| History | |
|---|---|
 United States of America
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| Name: | SS President Coolidge |
| Namesake: | Calvin Coolidge |
| Owner: |
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| Operator: |
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| Port of registry: | San Francisco |
| Route: | San Francisco – Kobe – Shanghai – Manila |
| Ordered: | 26 October 1929 |
| Builder: | Newport News Shipbuilding |
| Cost: | US $8,017,690 |
| Yard number: | 340 |
| Launched: | February 1931 |
| Completed: | 1931 |
| Out of service: | 26 October 1942 |
| Homeport: | San Francisco |
| Identification: |
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| Fate: | Sunk by mines |
| General characteristics | |
| Type: | ocean liner, then troopship |
| Tonnage: | |
| Length: | |
| Beam: | 81.0 ft (24.7 m) |
| Depth: | 52.0 ft (15.8 m) |
| Propulsion: | turbo-electric transmission |
| Speed: |
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| Range: | 14,400 mi (23,200 km) |
| Capacity: |
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| Troops: | Over 5,000 |
| Notes: | sister ship: SS President Hoover |
Coordinates: 15°31′27.12″S 167°14′6.78″E / 15.5242000°S 167.2352167°E
SS President Coolidge was an American luxury ocean liner that was completed in 1931. She was operated by Dollar Steamship Lines until 1938, and then by American President Lines until 1941. She served as a troopship from December 1941 until October 1942, when she was sunk by mines in Espiritu Santo in the New Hebrides. President Coolidge had a sister ship, SS President Hoover, completed in 1930 and lost when she ran aground in a typhoon in 1937.
Dollar Lines ordered both ships on 26 October 1929. The Newport News Shipbuilding and Drydock Company of Newport News, Virginia built the two ships, completing President Hoover in 1930 and President Coolidge in 1931. They were the largest merchant ships built in the USA 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. General Electric built the turbo generators and propulsion motors for President Coolidge but Westinghouse built the turbo generators and propulsion motors for President Hoover.
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