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).
Specification of a DB-42 Stromberg Carburetter and other component modifications for car 19-G-IV.
| Identifier | ExFiles\Box 20\9\ Scan083 | |
| Date | 13th January 1936 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation} X1033 Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}1/KW.13.1.36. 19-G-IV. Specification of DB{Donald Bastow - Suspensions}-42 Stromberg Carburetter fitted. Choke 1¼" dia. Main metering jet .062. Bypass jet .048. Main discharge tube with single feed hole 56. Idle tube jet 64. Pump jet 70. Air bleed 70. Seating .130. Petrol level .625". Diameter of pump link split pin increased from 1/32" to 1/16" dia. Piston stop set .250" and thermostat set at /2. Radiator thermostat fitted with a spring E.83210. This increases temperature to average of 78/80°C. Petrol gauge tank unit failed. New one fitted - std. Air silencer and bend fitted to rocker cover. Hs{Lord Ernest Hives - Chair}/G.Ratcliffe. | ||