Veteran Sonarman Explains Why Pump-jets Are Superior to Props on Modern Submarines
6th January 2020
Pump-jet propulsors also feature better efficiency across most all but the low-end of a submarine’s performance envelope. They protect the blade elements contained within them. They can also be handy in shallow water, especially if they have a nozzle or deflecting surfaces for thrust vectoring. There are drawbacks, as well. They are heavy, making them ill-suited for many smaller submarine designs, and they are costlier and more complex than a propeller.