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).
Graph showing the power necessary to rotate a Lorraine-Dietrich engine, compared to a 20 HP R.R. engine.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 129 | |
| Date | 29th March 1927 | |
| (12) LORRAINE-DIETRICH ENGINE. POWER NECESSARY TO ROTATE ENGINE. 29-3-27 HORSE POWER 25 20 15 10 5 0 R.P.M. OF ENGINE. 500 1000 1500 2000 2500 3000 LORRAINE 20 H.P. R.R. REQUIRED POWER PER LITRE. LORRAINE 20 H.P. R.R. [Stamp]: 27-3-27 | ||