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).
Performance graph comparing Bench and Dynamometer Horse Power for a 40/50 HP engine.
| Identifier | Morton\M7\ img076 | |
| Date | 1st May 1928 guessed | |
| HORSE POWER M.E.P. (LBS. PER SQ.') Y-AXIS SCALE: 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64 X-AXIS SCALE: 500, 750, 1000, 1250 LINE 1: H.P. 40/50 BENCH LINE 2: H.P. 40/50 DYN'R | ||