de Havilland Ghost

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A de Havilland Ghost, an RM2, built under license in Sweden

The de Havilland Ghost or Halford H-2 was a British first generation jet engine . It was based on the smaller de Havilland Goblin . It was a single-shaft engine. The compressor was a single-stage centrifugal compressor. Ten tubular combustion chambers were used as combustion chambers. The axial turbine was single-stage.

Development began in 1943 when the first preliminary drafts for the De Havilland DH.106 Comet showed that the Goblin, then still called the Halford H-1, was too inefficient for such an aircraft. De Havilland took over Halford while the first Ghost prototype was being built.

The first engine tests began in 1944. In 1945, the engine was first tested in flight in a converted Avro Lancastrian . There were contacts to Sweden, and license production at Volvo Aero was set up. The engines for the Saab 29 were manufactured there. They had the Swedish designation RM2.

Ghost engines were also used in the Comet 1 and 1a until more powerful successors were available. The RAF also showed interest in the engine to improve the performance of the De Havilland DH.112 Vampire . These machines were given the name de Havilland DH.112 Venom .


Type thrust rotational speed Weight Pressure ratio Air flow
Ghost 45 19.7 kN
Ghost 48 21.6 kN
Ghost 50 Mk 1 22.2 kN 10,000 min -1 912 kg 4.5 37.5 kg / s
Ghost 50 Mk 2 22.8 kN
Ghost 103 21.6 kN
Ghost 104 22.0 kN
Ghost 105 22.9 kN


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