Design

The design of the combustion chamber is optimized for minimum drag through the water. We opted for a torpedo-like shape in order to achieve higher velocities at the expulsion of water. 

Additionally, the chamber inflates to a spherical shape, which is advantageous, given that of all enclosed surfaces, the sphere has the largest volume to surface area ratio, thus maximizing the water expelled while minimizing the necessary material. The geometry and material selection proved to be fit, the chamber resisting to very high pressures.

Combustion Chamber
Combustion Chamber