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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).
Specification revision for the Peregrine.ll. No.4 Unit, detailing changes to the camshaft and pistons.

Identifier  ExFiles\Box 169\4\  img162
Date  1st June 1933
  
To Hs{Lord Ernest Hives - Chair}, from RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel} P.d unit
[REDACTED]
RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel}6/AP.1.6.33.

Peregrine.ll. No.4. Unit.

Specification of the above Unit is revised as follows:-

Passed to test. 1.6.33.

Camshaft IOP.E.100112.

Valve timing set one tooth earlier
i.e. -
I.O. 1° A.T.D.C.
E.C. 1° B.T.D.C.

Pistons IOP.E.100158.

The following New piston rings fitted:-

Hs.{Lord Ernest Hives - Chair}945 Scraper rings -.015 Chamfer.
Hs.{Lord Ernest Hives - Chair}949 Gas rings-next above scraper rings.

RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel}
  
  


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