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).
Performance test results and carburettor settings for vehicle 18-G-IV at Brooklands.
| Identifier | ExFiles\Box 155\1\ scan0192 | |
| Date | 9th November 1935 | |
| To Rm.{William Robotham - Chief Engineer} c. to Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation} X1320 Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}5/KW.9.11.35. 18-G-IV - Brooklands. Large bore unit, complete with new cylinder head and manifolds. Rear Axle ratio - 11 x 50. 19" x 6.00" tyres. Lap speed - 2 mins, 14 2/5 secs. 74.11 m.p.h. 1/2 mile 23 3/5 secs. 76.27 m.p.h. Air silencer and bend disconnected. Lap speed - 2 mins, 14 secs. 74.33 m.p.h. 1/2 mile 23 3/5 secs. 76.27 m.p.h. Maximum speed recorded on speedometer - 82 m.p.h. Carburetter 1¼" dia. choke .064" Main Jet .050 Bypass Jet 70 Air Bleed .055" Single Base Hole. Hs{Lord Ernest Hives - Chair}/G.Ratcliffe. | ||