Armstrong Siddeley Stentor

Stentor
Stentor rocket engine showing the large main nozzle (top) and the smaller cruise nozzle (bottom)
TypeRocket engine
National originUnited Kingdom
ManufacturerArmstrong Siddeley
First runc.1960
Major applicationsBlue Steel missile

The Armstrong Siddeley Stentor, latterly Bristol Siddeley BSSt.1 Stentor, was a two-chamber HTP rocket engine used to power the Blue Steel stand-off missile carried by Britain's V bomber force. The high thrust chamber was used for the first 29 seconds, after which it was shut down and a smaller cruise chamber was used for the rest of the powered flight.