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 gearbox control test results, plotting pump speed against delivery rate at various temperatures and pressures.
| Identifier | ExFiles\Box 179b\4\ img065 | |
| Date | 12th April 1935 guessed | |
| GEARBOX CONTROL TESTS, B.MENS. HGY. LMG-H-S.S. INCLUDING H.S.S. HGY S/M, CASTROL XL AT 50, 60 & 70°C., DELIVERY PRESSURE, DELIVERY PRESS NIL, 50°C, 60°C, 70°C, DELIVERY PRESS 200 LB/□'', DELIVERY PTS/HR, PUMP SPEED | ||