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 showing 'Per Heat To Oil' versus RPM for a ribbed sump under various oil return conditions.
| Identifier | ExFiles\Box 131\1\ scan0110 | |
| Date | 16th June 1933 guessed | |
| CURVE II. RIBBED SUMP USED FOR CURVES BELOW: PER HEAT TO OIL. LEGEND: RELEASE OIL NORMAL RETURNED VIA TAPPETS (SUMP DRAINED) RELEASE OIL DIRECT TO LOWER HALF (SUMP DRAINED) RELEASE OIL DIRECT TO LOWER HALF 1 GALLON IN SUMP RELEASE OIL NORMAL RETURNED VIA TAPPETS (1 GALL IN SUMP) RELEASE OIL TO EXTERNAL TANK ONLY BEARING OIL THRO' SUMP (SUMP DRAINED) AXES LABELS: Y-AXIS: BTHUS/MIN LESS RADIATION X-AXIS: R.P.M. AXES VALUES: Y-AXIS: 500, 400, 300, 200, 100 X-AXIS: 3500, 4000, 4500 | ||