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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Design position report on modifications for Kestrel and Merlin 'C' engines.

Identifier  ExFiles\Box 30\3\  Scan152
Date  17th April 1935 guessed
  
(8)
DESIGN POSITION.
ITEM

KESTREL ENGINE.

R.R. Variable pitch airscrew hub.
In hand.

MERLIN "C" ENGINE.

Mod. to ramp cylinder head - sparking plug on inlet side.
Put aside.

Mod. to coolant circulation system.
In hand.

Increased capacity oil scavenger pumps.
Completed.

Divided crankcase and cylinder jackets.
Completed.

Cyl.head mods to suit divided crankcase construction.
Completed.

Modified lower half crankcase.
Completed.

Modified pistons 6 to 1 and 6.5 to 1 compression ratio.
Completed.

Modifications to starter gearbox, water pump and pressure pump.
Completed.

Oil pipe - pressure pump to relief valves.
Completed.

Modified oil pipe connection to clear Fairey aircraft structure.
Completed.

Cover for servo pump drive.
Completed.

Modifications to supercharger drive.
In hand.

Modifications to oil pipes for V.P. airscrew reduction gear.
In hand.

" " centre main bearing block.
In hand.
  
  


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