At the age of 10, I came up with the design for a submarine with torpedoes, and only at 46 did I learn that 1) torpedoes on submarines predominantly use electric motors and this has been the case for about 70-90 years. For example, the USET-80 torpedo is powered by an electric motor, fed by a copper-magnesium battery, activated by seawater. 2) It turns out that the typical guidance method still involves an unwinding wire. Well, it’s clear why—interference protection, stealth, etc. For instance, the last long-term construction project “Physicist”/”Case” has a spool of wire 25km long. There are discussions about Western developments, where the distance can be 50-70 km, but the wires are not ordinary, they are fiber optic.
Hi, I'm Rauf Aliev. 