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 brake drum cooling rates at 40 M.P.H. for the 4B50 chassis.
| Identifier | ExFiles\Box 120\1\ scan0315 | |
| Date | 12th February 1941 | |
| BRAKE DRUM COOLING AT 40 M.P.H. 4B50 CHASSIS. FIGURE 6. TEMPERATURE IN °C. TIME IN MINUTES. 225 200 175 150 125 100 75 50 0 1 2 3 4 5 6 7 8 180°C 116°C O.S.R. 15.75°C/MIN. O.S.F. 24.2°C/MIN. Ren Hutter 12-2-41 | ||