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).
Requesting a modification to nomograms for calculating engine capacity and horsepower to include smaller engines.
| Identifier | ExFiles\Box 77\5\ scan0151 | |
| Date | 6th November 1918 | |
| To EFC. from E.{Mr Elliott - Chief Engineer} 6th November, 1918. E3/G61118. X.3290 RE NOMOGRAMS FOR CAPACITY AND HORSE POWER OF ENGINES. We recently had occasion to refer to your blue print nomogram for finding the horse power developed by an engine of car size, 4" in bore. We found that we were rather off the lower end of the scale. It would be useful to us if you could take the nomograms you are preparing, down to the origin, so that the smallest sizes of engines could be read off. [STAMP] 17 NOV 1918 E.{Mr Elliott - Chief Engineer} [STAMP] RECEIVED | ||