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).
Series of gearbox control tests plotting pump delivery rate against pump speed at various pressures and temperatures.
| Identifier | ExFiles\Box 104\4\ scan0196 | |
| Date | 19th April 1933 | |
| GEARBOX CONTROL TESTS TO MEMO HDY{William Hardy} 11(M8-4-33) INCLUDING ALSO HDY{William Hardy} 3/M 27-3-33 20/25 HP OIL PUMP .003 RADIAL .004 END CLEARANCES CASTROL XL. AT 50, 60 & 70 °C. DELIVERY PRESSURE 0, 100, 200 & 300 LB/SQ IN DELIVERY PTS/HR PUMP SPEED R.P.M. DELIVERY PRESS NIL 50°C 60°C 70°C DELIVERY PRESS 100 LB/□" 50°C 60°C 70°C DELIVERY PRESS 200 LB/□" 50°C 60°C 70°C DELIVERY PRESS 300 LB/□" 50°C 60°C 70°C | ||