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).
Engine improvements using nitro-hardened crankshafts and cylinder liners.
| Identifier | ExFiles\Box 154a\1\ scan0239 | |
| Date | 23th April 1931 | |
| XH 469 RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} ) FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} ) (At Le CanadelHenry Royce's French residence.) R4/M23.4.31. x.4469. x.3993. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} F.{Mr Friese} C. to HY.{Tom Haldenby - Plant Engineer} RIC. LR.{Mr Ellor} AERO - WORK - ENGINES. Our engine work is of the utmost importance and we ought to do our best to make it give the greatest satisfaction. I was delighted to see that we had got a real production move on with nitro-hardened crankshafts - main and big end, (and reliability of same,) oil consumption, etc, which should help so much in the cost of running. Quite a long time ago I was agitating for liners nitro-hardened because I thought piston rings would be less liable to seize. There is now another very definite reason - i.e. the co-efficient of expansion is so much more in keeping with the piston and jacket so that the piston clearance can be much less, and the gas and water joints happier. I have not heard how this cylinder liner job is going. Naturally as soon as we are satisfied that the designs are good we should press hard for some manufacturing tools because as OR. says there are less mistakes and better work, as well as lower costs of labour, and improved interchangeability. R.{Sir Henry Royce} | ||