> This appears to be a pressure-fed rather than pumped engine, so limited real-world utility
This is addressed in the article:
> This is a relatively compact engine, which would be suitable for a final kick stage of an orbital rocket.
It has lots of real world application, just not currently as part of a lift stage since you're right it's a pressure based one as opposed to a pumped engine.
This is addressed in the article:
> This is a relatively compact engine, which would be suitable for a final kick stage of an orbital rocket.
It has lots of real world application, just not currently as part of a lift stage since you're right it's a pressure based one as opposed to a pumped engine.