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 a 114° camshaft with a twin inlet cam and camshaft configuration.
| Identifier | ExFiles\Box 13\2\ 02-page159 | |
| 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 NORMAL To LEC2918 B.H.P. R.P.M. B.M.E.P. LBS/SQ." TWO INLETS TO E 82278 Diagram A: IN EX 3.7 10.4 50.3 54.4 .020 CLCE Diagram B: IN EX 2.5 1.5 52 49 .020 CLCE | ||