A rocket engine relies on a fine tuned mix of propellants that is delivered at pressures higher than those in the combustion chamber. At these conditions, careful design considerations are required to maintain stable ignition and continuous combustion.
For the Project19 prototype, the pintle-type injector has been chosen for this purpose. With an experimental pintle design and assembly complete, an experimental campaign is underway in preparation for hot-fire combustion testing.
Part of our experiments include extensive water and cryogenic testing to validate the design function and performance, as well as the associated control systems. Throughout these tests, propellant mass flow rates are calibrated to ensure an optimal mixture is supplied to the combustion chamber.
You can watch a snapshot of some initial water testing here: