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 standard and suggested Bentley cam toe profiles, lift, and velocities against crankshaft degrees.
| Identifier | ExFiles\Box 85\3\ scan0018 | |
| Date | 1st January 1940 | |
| BENTLEY CAM TOES. Y-AXIS (LEFT): VALVE LIFT - INCHES. Scale: 0, 0.005, 0.010, 0.015, 0.020. X-AXIS: CRANKSHAFT DEGREES. Scale: 0, 5, 10, 15, 20, 25, 30, 35, 40. Y-AXIS (RIGHT): VALVE VELOCITY - INCHES PER CRANKSHAFT DEGREE. Scale: 0, 0.0002, 0.0004, 0.0006, 0.0008, 0.001. LABELS ON GRAPH: SUGGESTED OPENING TOE. VELOCITY OF OPENING TOE. VELOCITY OF STANDARD TOE. STANDARD TOE LEG 3292. SUGGESTED CLOSING TOE. VELOCITY OF CLOSING TOE. OTHER TEXT: SHEET 1 X19/40 | ||