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).
Raising questions about valve seat trouble in Phantom and other engines.
| Identifier | ExFiles\Box 66a\2\ scan0026 | |
| Date | 16th April 1926 | |
| To Hs.{Lord Ernest Hives - Chair} RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} FROM R.{Sir Henry Royce} LE CANADELHenry Royce's French residence. c. to BJ. Wor.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} FN. X9060 R2/M16.4.26. PHANTOM AND OTHER VALVES. X.8060 X.2764. Very surprised after so many years to hear so seriously of valve seat trouble in cast iron and wrought steel. (1) What is the experience of others? (2) My Phantom after 7000 miles does not seem to have altered at all. (3) Can lubrication oil in Silver Ghost improve it? (4) Would cutting the cams away in aero engines so as to run with .020" clearance prevent running with too little clearance: we intended this at one time? (5) Are engines with inserted valve seats (say Lions and air-cooled) any better: if so which material? (6) Many times I have feared it was due to lift path being curved. R.{Sir Henry Royce} | ||