Английская Википедия:BMW 109-718

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Шаблон:Short description

Шаблон:Infobox aircraft engine

The BMW 109-718 was a liquid-fuelled rocket engine developed by BMW at their Bruckmühl facility, in Germany during the Second World War.

Development

The 109-718 (109 prefix number for the Reichsluftfahrtministerium, or RLM, designation used for all reaction-propulsion [rocket and gas turbine] aviation engine projects) was designed as an assist rocket for aircraft, for rapid takeoffs or to enable them to achieve high-speed sprints, akin to what Americans called "mixed power" postwar. It was combined with a standard BMW 003 jet engine, placed atop the rear turbine casing of the jet engine to create a new variant of it, the 003R, providing a total of Шаблон:Convert thrust at full power apiece; it was expected the units would be fitted in pairs. Unlike most RATO boosters,Шаблон:Efn-lr the liquid-fuelled 718 rocket engine system comprising the second propulsive source of an 003R engine remained with the airframe at all times.Шаблон:Sfnp

The rocket motor had internal and external main chambers which were cooled by the nitric acid oxidiser, fed through a coiled spiral tube. The centrifugal fuel pumps (operating at 17,000rpm) delivered a mix of nitric acid oxidiser and hydrocarbon fuel at Шаблон:Convert,Шаблон:Efn-lr a rate of Шаблон:Convert per Шаблон:Convert thrust per second. The 718's fuel pumps were driven by a power take-off from the jet engine which ran at 3,000 rpm. The complete unit weighed Шаблон:Convert.Шаблон:Sfnp

Before war's end, a Messerschmitt Me 262C-2b Heimatschützer II (Home Defender II, one of four different planned designs of the rocket-boosted Me 262 C-series) was tested with a pair of 718s — each as a part of a pair of the BMW 003R "mixed-power" propulsion units — climbing to Шаблон:Convert in just three minutes. The 109-718 was also tested aboard an He 162E, although records do not indicate the results of this test.Шаблон:Sfnp

The Germans hoped the rocket might eventually rely on the same fuel as jet aircraft.Шаблон:Sfnp

Only twenty 109-718 engines were completed by war's end, each taking some 100 hours to complete.Шаблон:Sfnp

Specifications

Шаблон:Jetspecs

Notes

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Citations

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Bibliography

Шаблон:BMW aeroengines Шаблон:RLM jet/rocket designations Шаблон:Rocket engines Шаблон:Aeroengine-specs