Space Forum / Space Flight / September 2005

Has anyone ever designed/built a hybrid jet-rocket (not a scram jet, but hey
if it scrams too then thats neat :)

I was thinking something along the lines of an external combustion rocket
nozzle, with a conventional turbofan jetting concentrically down the middle.
The turbofan could be used to power the pumps for the rocket fuel. Both
Burning LOX Kerosene in vacuo, the Turbofan burning air/kerosene on return
to atmosphere.

A quick check on google shows no such hybrid.