atmosphere
back to the compressor
discharge nozzle
vacuum
same
more
less
zero
higher
lower
uncomparable
turbo-jet
turbo-propeller
rocket
ram-jet ,
pulsojet requires no ambient air for propulsion
ramjet-engine has no turbine
turbine drives compressor in a burbojet
bypass turbo-jet engine increases the thrust without adversely affecting, the propulsive efficiency and fuel economy
