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 power outputs for different valve and exhaust configurations on a Bentley III engine.
| Identifier | ExFiles\Box 10\3\ 03-page159 | |
| Date | 1st June 1938 | |
| B III Nᵒ 1 UNIT BENTLEY. III. POWER VALVES. JUNE. 1938. ① CYL HEAD EX.29685 (C/R 5.9:1) IN VALVE EX.29686 (TULIP) 1.50 DIA EX " EX.29687 1.30 DIA OPEN EXH. ② AS ① BUT WITH COMPLETE B.II. EXH SYSTEM. ③ CYL HEAD EX 29685 (C/R.{Sir Henry Royce} 6:1) IN VALVE EX 31439 (NON-TULIP) 1.5 DIA EX " EX 29687 1.3 DIA OPEN EXH ④ AS ③ BUT WITH COMPLETE B.II. EXH SYSTEM. | ||