Advanced exhaust discharge for pump jet propulsion apparatus

Anti-vortex pintle

Cavitation compensating propeller nozzle or duct

Combined centrifugal and paddle-wheel side thruster for boats

Dual mode propulsion system

Flow-through pyrotechnic delay

Hydraulic engine

Hydraulic thruster

Hydrodynamic propulsion device

Hydrojet

Integrated nozzle and steering mechanism for waterjets

Jet propulsion engine

Liquid turbojet engine

Marine jet drive shift control apparatus

Marine vessel thruster

Multi-flow marine jet-propulsion apparatus

Power transmission

Pressure-actuated toy rocket system

Propeller assembly

Pulse-jet water propulsor