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 comparing the petrol delivery performance of an 'EX I Pump' versus a 'Standard S.U. Pump' at various temperatures.
| Identifier | ExFiles\Box 149\4\ scan0022 | |
| Date | 18th August 1936 | |
| 18-8-36 N° 2 EX I PUMP STANDARD S.U. PUMP DELIVERY IN PINTS PER HOUR AT 60C AT 70C FLOWS THROUGH CARBURRETTER FAILED PRATTS ETHYL PETROL PETROL TEMPERATURE °C | ||