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 of mechanical efficiency and compression pressure curves for a Lorraine-Dietrich engine, with a comparison to a 20 HP R.R. engine.
| Identifier | ExFiles\Box 5a\5\ 05-page020 | |
| Date | 21th March 1927 | |
| LORRAINE-DIETRICH ENGINE. MECHANICAL EFFICIENCY & COMPRESSION PRESSURE CURVES. (RATIO = 5.9 : 1) COMPRESSION PRESSURE. (LBS / SQ") PERCENTAGE MECHANICAL EFFICIENCY R.P.M. OF ENGINE. COMP. PRESSURES MECH. EFFICIENCY LORRAINE. 20 H.P. R.R. 20 H.P. R.R. COMP. PRESSURES (RATIO = 4.75 TO 1) 3 | ||