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).
Dalby Watson indicator and a patentable method for obtaining an indicator diagram from a fast-running engine.
| Identifier | WestWitteringFiles\B\January1918\ Scan0 | |
| Date | 5th January 1918 | |
| R.R. 235 A (400 T) (S.C. 536. 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. ORIGINAL RECEIVED JAN 5 1918 To EFC. from R.{Sir Henry Royce} C. to BJ. R10/W2.1.18. 3 X 3181 I have an old memo referring to the Dalby Watson indicator. I think this matter should not be lost sight of, and progress should be made to get a satisfactory apparatus as quickly as possible. X2981 You will remember that I suggested a long time ago a very easy and simple way of obtaining an indicator diagram slowly from a fast running engine. I should be glad to know whether you think it is worth while doing anything on the lines suggested. The arrangement as suggested by me is patentable. [Signature] R.{Sir Henry Royce} | ||