De Havilland Gyron Junior
The de Havilland Gyron Junior is a military turbojet engine design of the 1950s developed by the de Havilland Engine Company and later produced by Bristol Siddeley. The Gyron Junior was a scaled-down derivative of the de Havilland Gyron.
Source: Wikipedia — De Havilland Gyron Junior (CC BY-SA 4.0)