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).
Notes on engine troubles, magnesium usage, oil cooling, and visitor restrictions for experimental engines.
| Identifier | ExFiles\Box 173\1\ img167 | |
| Date | 22th January 1933 guessed | |
| IV TROUBLES. These seemed to be confined to sticking rings, oil consumption maintained at a constant figure as it varies with the ring and cyl bore finish, and Cylinder wear. No bearing troubles, valves ok at present output. Magnesium. Use being steadily increased. Not yet used for the Crank case proper except in special racin' engines but - used for the gear case on latest geared engines. Oil Cooling. No oil coolers required below 135 B.H.E.P. They have not yet established high oil temps as being harmless but are thinking that way. They run inlets to bearings at 160°F at present. There seems to be a tendency on the part of the Army & Navy to tighten up restrictions re people seeing experimental engines. No Japanese are allowed into any | ||