But not necessarily more efficient at thrust.. a turbine is mixing fuel with oxygen from the env to both spin the turbine but also vents the exhaust and gets th

But not necessarily more efficient at thrust.. a turbine is mixing fuel with oxygen from the env to both spin the turbine but also vents the exhaust and gets thrust that way. So it doesn't carry smth like 3/4 of its reaction mass. I know that turbofans duct in most of their flow, so not sure how this nets out on a large-scale device.