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).
(page 2) providing manufacturing instructions for needles with a specific tolerance.
| Identifier | ExFiles\Box 121\4\ scan0039 | |
| Date | 2nd July 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation}5/KW.2.7.35. Also will you please part these needles off square at dimension 14. We would like this length within a limit of .005". Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||