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 the delivery performance of a GII water pump against engine RPM.
| Identifier | ExFiles\Box 77\4\ scan0322 | |
| Date | 27th March 1923 guessed | |
| DELIVERY GII WATER PUMP SECS. TIME FOR 50c.c.m.s. (TEST RADIATOR) 200 100 ENGINE R.P.M. 500 1000 1500 2000 2500 3000 | ||