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} | ||