List of modifications and specifications for an engine.
| Identifier | ExFiles\Box 83\2\ scan0081 | |
| Date | 2nd July 1937 | |
| -2- Rm {William Robotham - Chief Engineer} /Gry {Shadwell Grylls} 6/R.2.7.37. ENGINE. X (1) Hykro crankshaft and die cast bearings. X (2) Long type clutch plate. (3) P.III type water pump bend to prevent present trouble of cracked bosses in cyl. block. X Bushings to rockers eliminated for economy. X (4) R.R. made low carbon valve springs. X (5) T.T. type cylinder head. X (6) By-pass filtration. X (7) Improved crankcase breathing. (8) Castings in L5 alloy. (9) S.65 Inlet valves cheaper. Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} | ||
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).