James Madison class submarine
- James Madison class submarine
The "James Madison" class of submarine was an evolutionary development from the "Lafayette" class of fleet ballistic missile submarine. They were identical to the "Lafayette"s except for being designed to carry the Polaris A-3 missile instead of the earlier A-2. During the late 1970s and early 1980s, select units were further modified to carry Trident-I (C-4) missiles. Together with the "George Washington", the "Ethan Allen",the "Lafayette", and the "Benjamin Franklin"classes, they comprised the "41 for Freedom."
Class Improvements
Improvements in the James Madison class included the ballistic missile, guidance, fire control, navigation, and launcher systems. The improved missile system introduced was the Polaris A3 missile. The A3 was restricted by size because it had to fit into the existing submarine launch tube. But it was 1.5 inches longer, weighed 4,000 lbs more, and had a 1000 nm longer range, than the A2. Additionally, the number of reentry systems was increased from 1 to 3, making this the first multiple reentry vehicle missile.
The guidance, fire control, and navigation systems were improved to account for the longer range of the A3 missile. The launcher system was improved by replacing the liquid springs on which the launch tube rested with polyurethane foam.
Boats
* (SSBN-627) USS "James Madison"
* (SSBN-628) USS "Tecumseh"
* (SSBN-629) USS "Daniel Boone"
* (SSBN-630) USS "John C. Calhoun"
* (SSBN-631) USS "Ulysses S. Grant"
* (SSBN-632) USS "Von Steuben"
* (SSBN-633) USS "Casimer Pulaski"
* (SSBN-634) USS "Stonewall Jackson"
* (SSBN-635) USS "Sam Rayburn"
* (SSBN-636) USS "Nathanael Greene"
See also
* "41 for Freedom" Fleet Ballistic Missile submarines
*
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