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 comparison graph of a 114° camshaft versus a two-inlet-cam camshaft setup, showing BHP and BMEP against RPM.
| Identifier | ExFiles\Box 179\2\ img020 | |
| Date | 27th November 1931 | |
| RM.{William Robotham - Chief Engineer} P.37 27/11/31 DIRECT COMPARISON OF 114° CAMSHAFT WITH TWO INLET CAMS AND CAMSHAFT TO LE C 2918 E 82448 TWIN CARBS. 1.4 CHOKES. OPEN EX MAN. ONLY. HIGH LIFT ROCKERS C/R 4.65-1 A B NORMAL To LEC2918 IN EX .020 CLCE 3.7 10.4 50.3 54.4 TWO INLETS TO E 82278 IN EX .020 CLCE 2.5 1.5 52 49 B.H.P. R.P.M. B.M.E.P. LBS/SQ" | ||