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 braking curves for a 40/50 model, plotting road speed against time to rest under various braking conditions.
| Identifier | ExFiles\Box 73\3\ scan0301 | |
| Date | 19th March 1925 | |
| BRAKING CURVES. 40/50 R.R. ROAD SPEED M.P.H. TIME TO REST. SECONDS. VERMOREL A.{Mr Adams} B. REAR BRAKES ONLY COEFFICIENT OF FRICTION. BETWEEN TYRE SURFACE & ROAD. .7. A.{Mr Adams} VALUES FOR A CAR IN WHICH ALL FOUR WHEELS CAN BE LOCKED. B. VALUES FOR A CAR WITH THE REAR WHEELS LOCKED. FRONT TO REAR RATIO 40 TO 60. ALL FIGURES FOR OPEN TOURING CAR. WEIGHT FRONT 1.05 TONS. REAR 1.10. ROLLS-ROYCE LIMITED. PRINT ROOM 14 APR 1925 | ||