All are pressure fed. A pump generates pressure. It's common to test engine components without pumps using high pressure vessels in lieu of pumps. The E Complex at Stennis Space Center specializes in this approach.
Pressure fed is a fixed term when applied to rocket engines and means “fed only by the pressure in the tank (which is most of the time generated by having a pressurization system fed by another high pressure helium tank) and not by a pump”.
Comments
All are pressure fed. A pump generates pressure. It's common to test engine components without pumps using high pressure vessels in lieu of pumps. The E Complex at Stennis Space Center specializes in this approach.
Pressure fed is a fixed term when applied to rocket engines and means “fed only by the pressure in the tank (which is most of the time generated by having a pressurization system fed by another high pressure helium tank) and not by a pump”.