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The Engine Configuration - 8 Centaurus Sleeve Valve engines

To achieve the necessary reduction in drag and also achieve the design criteria, i.e. non-stop across the Atlantic with 100 passengers, a serious rethink was needed. Bristol had done some initial design work for the aborted Type 159 long-range bomber. This had been a 100 ton bomber with a range up to 5000 miles.

Analysis of the current designs showed that conventional wing mounted engines accounted for 30% of the overall drag, although only 5% was needed for cooling. It became clear to the design team that power plants completely submerged in the wing were thus likely to reduce total drag by 25%, if technically feasible.

The wing would have to be at least as thick as the height of the engine, and coupling several engines side by side to a single airscrew would leave the outer wing free from interference and available for fuel storage. By using this method the larger range required could be easily achieved.

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This is page 4 of The Bristol Brabazon - Engineering masterpiece or Great White Elephant.
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Brabazon engine layout - Twin coupled Centaurus Power Plant

Brabazon engine layout - Twin coupled Centaurus Power Plant
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Brabazon - Wing mounted test rig

Brabazon - Wing mounted test rig
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Brabazon - Showing the Port wing engine installation. Ken FitzGerald Flt test electrical engineer and Bill Machin Electrical production manager.

Brabazon - Showing the Port wing engine installation. Ken FitzGerald Flt test electrical engineer and Bill Machin Electrical production manager.
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