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).
List of tests to be conducted on an engine unit, including checks for power, exhaust, compression, and oil consumption.
| Identifier | ExFiles\Box 155\2\ scan0293 | |
| Date | 6th February 1939 | |
| -3- RM{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}3/JH.6.2.39. obtained from garage). After running in following tests to be taken. (1) Power open exhaust on best valve timing also power with (a) Standard Bentley exhaust system. (b) Duplex exhaust systems. back pressure to be checked. (2) With standard Bentley exhaust system check on 'Redline' non detonating power, max. power, giving ignition advance also governor characteristic with fixed initial timing. (3) Check compression pressures. (4) Obtain figures of sensitivity of ignition advance against M.E.P. similar to tests on No.1 unit (Also switching off characteristic. (5) Repeat (2) and (4) with solid stem exhaust valves. (6) Continue investigation of crank damper with (a) Friction damping. (b) Increased inertia damper flywheel. (c) Optimum spring loading. (7) Continue development of induction system (Rm{William Robotham - Chief Engineer}/CTS{C. Trot Salt - Carburation}) (8) Before this unit is passed off, an oil consumption should be run over 1 hr. at 4,000 r.p.m. If above 2 pts/hr. repeat. No.2 Test House. B.11 No.4 Unit. Has been fitted with new main and big end bearings. After running in carry out oil consumption over 2 hrs. at 4,000 r.p.m. and repeat until a stable figure is obtained. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||