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).
Query regarding the calculation method for mean effective pressure in horse power curves of foreign cars.
| Identifier | ExFiles\Box 124\3\ scan0119 | |
| Date | 31th May 1921 | |
| X.3317 To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} E6/G31.5.21. X.1692 X.3317 RE HORSE POWER CURVES OF FOREIGN CARS. Referring to your report hs{Lord Ernest Hives - Chair}1/LG20.5.21, Mr. Royce would like to know if the curves of mean pressure give dynamometer M.E.P. which would include the losses in the transmission, and road wheels, or whether they represent the brake mean pressure of the engine only. E.{Mr Elliott - Chief Engineer} | ||