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).
Requesting the manufacture of three sets of modified servo cams for hydraulic brakes.
| Identifier | ExFiles\Box 152\2\ scan0253 | |
| Date | 30th March 1939 | |
| 129H To HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}16/JH.30.3.39. Will you please make three sets of servo cams to GB.4232 and GB.3709 but with a cam angle of 30° instead of 35°C as shown on these drawings. These are urgently required for the cars fitted with hydraulic brakes. Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems} | ||