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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).
Two types of pistons for a 10,000-mile Phantom engine test.

Identifier  ExFiles\Box 15\3\  Scan013
Date  1st May 1928
  
Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce}
BY.{R.W. Bailey - Chief Engineer}
c. to BJ. Wor.{Arthur Wormald - General Works Manager}

E.{Mr Elliott - Chief Engineer} 7040
R3/M1.5.28.

PISTONS FOR NEXT 10,000 MILES PHANTOM.

Please send two pistons, short and long, sand cast in HL's L.250 (?) and standard, afterwards die-cast.

The short one is for current production and EAC.10. production.

The long one is for sports, and alum. head

All rings to be pinned - bottom wider.

Test with perfect circle - hope this will pass.

Test with 'L' shaped ring as scraper as shewn because it is practical.

Piston pins must be spring tempered.

R.{Sir Henry Royce}
  
  


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