Water-flow test of the Pyralis  engine injector

Injector v2 test

We conducted a water-flow test of our version 2 injector design. The injector uses a triplet impinging jet design to mix and atomize the propellants. This water-flow test video shows the injector producing a finely misted spray of water, validation the impinging jet design.

Cross section of the Pyralis engine, showing the revised spike support design.

Spike support redesign

James, Matt and Connie have re-designed the supports that hold the nozzle spike into the combustion chamber of the Pyralis engine. The new support design will be more resilient to thermal expansion, vibration, and machining tolerances. Using this design will better control the nozzle’s throat area, leading to more consistent and predicable thrust.

preburner test still

Preburner Test

We successfully tested the preburner for Pyralis today! The pre-burner acts like a pilot light during the engine start up sequence – the flames from the preburner will heat the combustion chamber, and will cause the main propellants to burn when they are flowed into the chamber. The pre-burner runs on propane and compressed air,…