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).
List of proposed valve tests for a 20/25 v. Bentley engine.
| Identifier | ExFiles\Box 106\5\ scan0159 | |
| Date | 29th April 1936 | |
| Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/KW.29.4.36. X534 Valve Tests. (1) 20/25 v.{VIENNA} Bentley for temperature - (a) .004" cold clearance. (b) .008" " " (c) .012" " " (2) Endurance run with three tappet clearances (where all valves similar) .004", .008", .012". (3) Can we detect any difference between valves 1 &6 when water is at 95°C. outlet, if so - (4) Is this improved by putting all the water round the back of the head. (5) What happens to a valve when it is run off the seat .003"? Does it burn or stretch? (6) Life of exhaust valve bouncing. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||