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 air-flow of various Bentley cylinder heads.
Identifier | ExFiles\Box 31\2\ Scan142 | |
Date | 6th December 1933 guessed | |
COMPARISON OF VARIOUS BENTLEY CYLINDER HEADS BY AIR-FLOW TESTS. FLOW. CU.FT/MIN. PRESS. DIFF. ACROSS VALVE - INS. HG ER.1237 ALUM. HEAD STREAMLINED PORT INLET TURBULENCE REMOVED. STD. WOODEN MODEL. (1.5" VALVE) (1.4" VALVE) (CAST IRON) LARGE INLET BENTLEY HEAD-E.B.61B E.B.1237-STREAMLINED PORT ETC E.B.1237-ALUM. HEAD. STD. CAST IRON HEAD - E.B.615 (1.5" VALVE) (1.5" VALVE) (1.4" VALVE) ALL CURVES AT 0.400" LIFT | ||