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).
Note on the importance of correct hole drilling in tap manufacturing for autovac and carburetter systems.
| Identifier | ExFiles\Box 64\1\ scan0030 | |
| Date | 13th February 1929 guessed | |
| contd :- -2- In the manufacture of these taps it is very essential to ensure that the drilling of the holes is correct. If the horizontal holes do not coincide with the hole from the autovac and with the hole to the carburetter, the rate of flow is very much diminished. Ha/A.J.Lidsey. | ||