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).
Photographs and diagrams of a Dalby Watson Optical Indicator.
| Identifier | ExFiles\Box 79\3\ scan0098 | |
| Date | 13th September 1918 | |
| To R.{Sir Henry Royce} from EFC. c. to CJ. EFC5/T13.9.18. X.3181 - DALBY WATSON OPTICAL INDICATOR Herewith please receive photographs of Dalby Watson Optical Indicator, together with a photostat copy of indicator diagrams taken by Messrs. Cussons with this indicator in operation on a small single cylinder engine, also a description of an earlier form of this indicator taken from the "Mechanical Engineer" of March 1914. We send also copies of all the letters we have received from Messrs. Cussons in connectionwith this job. EFC. | ||