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Otto fuel II is a monopropellant mixture of chiefly propylene glycol dinitrate (an ester of nitric acid and propylene glycol, and structurally similar to nitroglycerin) that is used to drive torpedoes and other weapon systems. It was invented by Otto Reitlinger in 1963 (although tests with the substance had taken place before, for example in 1960[1]). Otto fuel II, sometimes known simply as Otto fuel, is not related to the Otto cycle; it is named after Reitlinger and for being the second iteration of the fuel. It was developed by the US Navy and the first torpedo to use it was the Mark 48 torpedo in the 1960s.[2][3]
- ^ U.S. Naval Propellant Plant (c. 1964). Otto Fuel II (Technical Film Report). Indian Head, Maryland: Bureau of Naval Weapons. Retrieved 2022-12-10.
- ^ "OTTOFUELII CAS#: 106602-80-6".
- ^ "Otto fuel II - Everything2.com".