The powerplant was to be General Electric's new TG-180 turbojet engine. He is credited with single-handedly inventing the turbojet engine. The Crusader was powered by a Pratt and Whitney J57 turbojet engine. Northrop University loaned the production a working GE turbojet engine. Other designs includes ramjets or even a complete turbojet engine. The thick wing roots contained the air intakes feeding a single turbojet engine. Using only cycle flow was relatively short-lived as the turbojet engine. The "Vampire" was powered by a single Bristol-Siddeley Orpheus afterburning turbojet engine producing of thrust. It would be the first to be powered by the indigenously-developed Pirna 014 turbojet engine. Packs with a turbojet engine are fueled with traditional kerosene-based jet fuel. It would be Spain's first indigenously-developed aircraft to be powered by the turbojet engine. The H.126 was powered by a single Bristol Orpheus turbojet engine. It was powered by a single Rolls-Royce Avon RA.14R turbojet engine with reheat. The single turbojet engine was fed by cheek intakes. The Teledyne CAE J402 is a small turbojet engine.