So I have various factions with submarines and surface ships battling it out for control over various underwater resources.
One of the rarer and more lethal weapons is a "stealth torpedo". It presents a serious threat when employed because as its name implies, it is very difficult to detect and, by the time it is, it is often too late for evasive maneuvers. Would It be possible to somehow muffle the sound of the engine for defeating passive sonar as well as bend sound waves around the torpedo hull like a stealth fighter to beat active sonar?
Currently, I have a system similar to the Caterpillar Drive from Red October driving the torpedo. However, as far as I can tell from the research I have done, the few prototypes in existence are too slow, impractical, and not to mention too big to fit in a torpedo.