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).
Blueprint graph comparing the valve lift of two different Bentley exhaust cam toe designs against crankshaft degrees.
| Identifier | ExFiles\Box 102\5\ scan0159 | |
| Date | 12th February 1937 guessed | |
| BENTLEY CAM TOES UNIT 87 No 2 CYL. EXHAUST CAM. CAMS MADE TO LIFT CURVE LEC 329. DOTTED CURVE SHOWS TOES TO LEC 3292. VALVE LIFT — INCHES. CRANKSHAFT DEGREES. CLOSING TOE OPENING TOE MAX CLEARANCE FOR QUIET CLOSING MAX CLEARANCE FOR QUIET OPENING VELOCITY 0·000758 per degree. 0·000508 per degree. SHEET. 5. | ||