[GH85Carrera]

The "water brake" used on the first nuclear submarine prototype - built in the desert of Idaho. Usually you'd build a first-of-its-kind prototype in a spread-out fashion so that you could troubleshoot more easily, but Admiral Hyman G. Rickover insisted that everything that would go into a submarine hull be put into an actual hull section, which was mostly submerged in a tank to simulate minimum shielding. The propeller shaft turned a drum inside the water brake to simulate the load of a propeller on the power train. So great was the shaft horsepower that extra cooling had to be improvised when the plant was operated at full power. This plant provided training and research from 1953 until 1989.