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).
Performance test record for a tyre pump, noting strokes required for pressure and pump dimensions.
| Identifier | ExFiles\Box 149\5\ scan0006 | |
| Date | 25th January 1912 | |
| Re Tyre pump. X993 E.P.9/T25.1.12 3900 To obtain pressure of 80 lbs per sq inch. Pump required 600 strokes. Bore of pump = 1 - 7/16". Stroke " " = 18". Taken by Taylor 24-1-12 CJH 9/2/12 | ||