Test at Gstaad Airport on 27th of November 2021, ran our no.2 engine on liquid oxidiser compared to only gas in the UK tests. The oxidiser quantity and engine impulse were increased by a factor of nearly 10, and the the chamber pressure raised from around 5 bar to over 20 bar on the first Swiss test to nearly 50 bar on the 2nd one. We supercharged the flow with nitrogen pressurant which has not been done in the UK before and in doing so significantly raised the thrust from its initial values.
The propellants used, nitrous oxide N2O and polyethylene HDPE are some of the cleanest available to the space industry, producing an exhaust of largely water vapour and having an extremely low production energy requirement, resulting in one of the lowest carbon footprints in the world for an engine of this size.
