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).
Graph plotting heat radiated by the crankcase against inlet temperature at a constant speed of 3500 R.P.M.
| Identifier | ExFiles\Box 131\1\ scan0120 | |
| Date | 16th June 1933 guessed | |
| CURVE 4. RUN AT CONSTANT SPEED 3500 R.P.M. RELEASE RETURNED DIRECT TO LOWER HALF (SUMP EMPTY) MEAN OF RIBBED & PLAIN SUMP. HEAT TO OIL BTH'US/MIN PER °C DIFF. IN TEMP. BETWEEN OIL IN SUMP IN ATMOSPHERE. ACTUALLY HEAT TO OIL - HEAT RADIATED BY CRANKCASE. INLET TEMP. °C. 0 1 2 3 4 5 0 60 70 80 90 100 110 | ||