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 delivery curves for Merlin engine oil pumps against engine RPM.
| Identifier | ExFiles\Box 136\3\ scan0128 | |
| Date | 13th May 1941 guessed | |
| MERLIN ENGINE OIL PUMPS DELIVERY CURVES WITH DTD 109 OIL AT 90°C DELIVERY PRESSURE 150 lbs/in² AXIS LABELS: DELIVERY G.P.H. ENGINE R.P.M. PLOT KEYS: HBY.49 INC. CAP. SCAV. PUMP (CONT. ON B/P V2) A BY 47 INC. CAP. PRESS PUMP ORIGINAL ST'D SCAV PUMP (ONE ASSY) ORIGINAL ST'D PRESS. PUMP PUMP : ENGINE RATIO 1.738 : 1 | ||