These types of engines lack the traditional gas turbine that helps generate combustion energy and forward thrust as would typically be present in a modern jet engine. Instead, ramjet engines rely ...

Hermeus is developing the Chimera, a Turbine-Based Combined Cycle (TBCC) engine that combines a turbojet (using off-the-shelf components like the Pratt & Whitney F100) with a ramjet: Efficiency: While ...

It’s clear that he hasn’t created the equivalent of a conventional turbojet. Since it appears ... it has more in common with a ramjet that gains its required air velocity with the help of ...