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 comparing the depression in the induction pipe for a Lorraine-Dietrich engine and a 20 HP R.R. engine.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 122 | |
| Date | 21th March 1927 | |
| 6 LORRAINE-DIETRICH ENGINE. DEPRESSION IN INDUCTION PIPE. DEPRESSION IN INDn. PIPE (INCH. OF MERCURY). R.P.M. OF ENGINE 20 H.P. R.R. LORRAINE. 21-3-27 Y-Axis: 2.5, 2.0, 1.5, 1.0, .5, 0 X-Axis: 1000, 1500, 2000, 2500, 3000 | ||