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).
Graphs showing oil pump delivery pressure versus RPM at different temperatures and pressures.
| Identifier | ExFiles\Box 179b\4\ img066 | |
| Date | 12th April 1935 | |
| 12-4-35 REF: SP.{Mr Spinney} 55 20/25 H.P. OIL PUMP. JO3 RADIAL OUTLET END CLEARANCES ON 100, 200 & 300 LB/SQ IN DELIVERY PRESS. 100 LB / □ 50°C 60°C 70°C DELIVERY PRESS. 300 LB / □ 50°C 60°C 70°C R.P.M. 500 1000 1500 2000 H.B. | ||