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 plotting a variable against a flow rate measured in pounds per minute.
| Identifier | ExFiles\Box 179b\3\ img265 | |
| Date | 17th February 1933 guessed | |
| ( LBS/MIN ) 0 10 15 20 | ||