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 showing the efficiency and movement of Girling Cams under varying loads.
| Identifier | ExFiles\Box 120\3\ scan0127 | |
| Date | 3rd January 1935 guessed | |
| PERCENTAGE EFFICIENCY EFFICIENCY CURVE EFFICIENCY OF GIRLING CAMS READINGS TAKEN WITH BRAKE DRUM IN POSITION. MOVEMENT - THOUSANDTHS OF AN INCH INDICATING CLOCK FIXED AT A RADIUS OF 7 1/2" FROM SHOE PIVOTS, THE OPERATING CAMS BEING AT A RADIUS OF 9 1/2". LOAD - LBS | ||