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The 'Hawker Siddeley P.1154' was a supersonic VSTOL fighter aircraft being developed alongside the subsonic Hawker P.1127/Kestrel. The project was cancelled in 1965.

Contents

Development

Specifications (P,1154)

References

External links

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Development

The project came about as a possible aircraft for use both with the Royal Air Force and the Royal Navy. It would replace the Hawker Hunter in the RAF and the de Havilland Sea Vixen in the Fleet Air Arm (FAA). The RAF requirement was for a single seat fighter, the RN a two seat interceptor. Accordingly the design started to diverge with the naval version being the P.1154RN.
Propelled by a single Bristol Siddeley BS100 vectored thrust turbofan, the aircraft would have reached supersonic flight speeds from the thrust boost obtained by igniting the engine's PCB (Plenum Chamber Burning) system. Rolls-Royce offered a PCB, vectored thrust twin-Spey design as an alternative.
The P.1154 came out equal winner in a NATO run competition with the Dassault Mirage IIIV, a separate lift/thrust engine concept. The P.1154 was adjudged technically superior but the Mirage gained points for the scope for cooperative development and production across member nations.
With the RAF and RN requirements diverging, the aircraft was looking less viable. The RN cancelled their interest in 1963, removing the need to meet the requirements of both services, and work on the RAF P.1154 prototype started. However, the following year the government cancelled the P.1154 along with the BAC TSR-2. Following the cancellation the RAF and RN adopted the F-4 Phantom II instead, but the government also gave a contract for continued work on the P.1127, which led to the Harrier.

Specifications (P,1154)

References

External links

★ ''The P.1154 story'' at Harrier.org.uk

★ Hawker P.1154 and P.1152

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