Once it became clear that new weapons and technology would be required the turbojet program was speeded up, the timescale forced on the programs head, Dr Anselm Franz, to keep the design simple to avoid development time he did not have, the result was an engine which he knew only scratched the surface of what could be done if he had more time, also instead of developing new materials they had war driven shortages of even existing ones after the first eighty engines had been produced. The result was a design with great potential but not the reliability of the British turbojet engines, service life often being at little as 10 hours, rapidly throttling up being decidedly damaging to the engine.
It is of note that the Junkers Jumo 004 was started using a built in 10hp two-stroke engine mounted in the centre of the engine's air intake, it was it's self started with a pull cord by ground crew. The Jumo was also made after WW2 in the Soviet Union as the RD-10 engine, and in Czechoslovakia by Malešice as the M-04. Aircraft that were powered by the Junkers Jumo 004 | | Arado Ar 234 | Heinkel He 280 | Horten Ho 229 | | Junkers Ju 287 | Messerschmitt Me 262 | | | | | |
Junkers Jumo 004B Specifications: Type: Axial flow turbojet Length: 3.86 m (152 in) Diameter: 0.810 m (32 in) Dry weight: 719 kg (1,585 lb) Compressor: 8-stage axial compressor Combustors: Can-type, 6 Turbine: Single-stage Maximum thrust: 8.8 kN (1,980 lbf) at 8,700 rpm Overall pressure ratio: 3.14:1 Specific fuel consumption: 0.139 kg/(N·hr) Thrust-to-weight ratio: 1.25 (12.2 N/kg)
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