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Napier Sabre - Miscellany

Where to see:

There are several locations where Sabre engines may be viewed

    Imperial War Museum Duxford

    NMSI Store, Wroughton, Nr. Swindon

    NPHT collection

    RAF Museum Hendon

    Rolls-Royce Heritage Trust, Derby

   

Napier Sabre SU Carburetters

Morris Motors owned the SU Carburetter Company which, during the war produced the carburetters for the Napier Sabre engine.  This image shows the difference between the Sabre carburretter and one of their standard car versions.

This interesting image came from the Austin Memories Website.  

Tempest Momentum air cleaner Dome Dust Excluder
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Tempest MkV NV993 'nose in' after accident
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Tempest NV768 with Sabre VI with Annular Radiator
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Hawker Tempest annular radiator installations and
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Illustration of Hawker Tempest rad-oil cooler and
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Napier Sabre SU Carburettor comparison
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Momentum Air Filter

After the Normandy invasion temporary landing strips were built for Typhoons to provide close air support to the advancing allied troops.  Within a few days the aircraft started to experienced problems as the engines drew coarse Normandy dust through their air intakes causing wear in the cylinders and grounding the aircraft.  The situation was serious and the Air Ministry contacted D Napier & Sons Flight Development Establishment at Luton.  Napiers reacted swiftly to the challenge by designing, built and test flying a new momentum type air filter that was 96% efficient in just ten hours.

The full story can be read here.

 

 

One major problem with the design of the Hawker Tempest and Typhoon aircraft was that they had a large 'chin' radiator.  If another aircraft got into trouble it could crash land, for example in a field, bybelly flopping and sliding along the ground.

The chin radiator meant that any such landing was more risky because it would make contact with the ground first, dig in and flip the aircraft over.

 

 

Annular Radiator

Napiers spent a great deal of time researching and developing a range of solutions.  The requirement was to allow sufficient airflow across the radiator with adjustment to correctly regulate the cooling. This increased as the engine Series was developed and required extra cooling.

 

The solution was to create an annular radiator allowing air to pass through the spinner of the aircraft.  As can be seen in the images several types of annular radiator were tested and developed.  In reality very few Sabre engined aircraft actually received this modification die to the war ending.  The unique Vickers Warwick HG248 was the only twin engined Sabre aircraft and it had annular radiators.

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