Diagram of a float mechanism designed to drain petrol in case of a puncture.
| Identifier | ExFiles\Box 101\1\ scan0174 | |
| Date | 27th March 1936 guessed | |
| .350 DIA 3.250 TO BE SWEATED OR BRAZED 2 HOLES .1875. .250 WILL DRAIN FULL SUPPLY OF PETROL WITH PUNCTURED FLOAT. Rm. {William Robotham - Chief Engineer} 101 | ||
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).