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).
Instructions for correcting readings from a Haslar Speed Indicator.
| Identifier | ExFiles\Box 33\5\ Scan028 | |
| Date | 31th August 1921 | |
| R.R. (100) T: S.H. 728. (10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2948 X 2675 31st. August, 1921. X.2675 - HASLAR SPEED INDICATOR. For readings up to 1000 R.P.M. subtract 1% from reading. For readings beyond 1000 R.P.M. subtract 1½% from reading. EFC. | ||