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).
Engine oil consumption tests comparing different piston ring configurations.
| Identifier | ExFiles\Box 144\3\ scan0130 | |
| Date | 18th November 1936 | |
| File 1220. Rm.{William Robotham - Chief Engineer} 18.11.36. G.A.E. 20. OIL CONSUMPTIONS. (1) Pistons fitted with 2 L. section rings. 5.8.36. Oil consumption. = 1300 m.p.g. (2) Pistons fitted with 1 L section ring 5.9.36. Oil consumption at start = 832 m.p.g. with Rm.{William Robotham - Chief Engineer} (3) After further 2335 miles - 672 m.p.g. 15.11.36. Average speed 50 m.p.h. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||