31. In the 1950s, nuclear power partially replaced diesel-electric propulsion . 32. However, Hall thrusters operate at the high specific impulses that is typical for electric propulsion . 33. The main innovations were triple turrets and turbo-electric propulsion . 34. She had turbo-electric transmission, with turbo-generators and electric propulsion motors built by Alsthom of Belfort. 35. The L-2350 uses a diesel electric propulsion system similar to that used in a locomotive. 36. The first designed and tested electric propulsion in the world was in 1929-1931 in Leningrad. 37. Newer versions feature electric propulsion , using lithium polymer batteries. 38. Where electric transmissions are used, this is referred to as integrated electric propulsion or IEP. 39. However, the " Fliegender Hamburger " had diesel-electric propulsion . 40. This produced current for an AEG electric propulsion motor that drove a single propeller shaft.
