Engines
We use two Motorguide ET22 trolling motors as our main thrusters and two heavily modified rule 1100 bilge pumps equipped with CPU fans for propeller blades as our vertical thrusters.

The main thrusters have been modified in order to take one of our Brad Harrison industrial connectors as well as to carry internal water alarms that allow us to detect if water has penetrated into the engine housings.

The vertical thrusters are heavily modified Rule 1100 Bilge Pumps. These motors are an excellent source of relatively small electric engines that are water sealed. We of course modified them to make them an even better seal as well as installed water alarms on the inside and bring our Brad Harrison water proof connectors straight to the engine contacts. The original design of these motors calls for a simple impeller on the shaft. This is obviously incompatible with the new purpose of driving our submarine up and down, thus we installed propellers. Small propellers are hard to find so we went to CPU fans, which have a very high pitch and high blade count and happened to compliment our bilge pump motors very well. These motors are extremely cheap and prone to leakage at depth due to its relatively weak rotary seals - thus we have assembled three full sets.