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).
Programme of test bed work for the Bentley III No.1 engine, detailing a series of performance and component tests.
| Identifier | ExFiles\Box 155\2\ scan0263 | |
| Date | 15th November 1938 | |
| To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} 1315 γ Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}15.11.38. PROGRAMME OF TEST BED WORK. Further to Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}2/MH.{M. Huckerby}10.9.38. NO. 30 BED. BENTLEY III NO.1. (a) Complete camshaft comparison test. On best timing, take with B.III induction system and carbs, Shell petrol and test bed exhaust system, ignition advance for max. power also non-detonating power and advance. (b) Remove pistons and fit .3 raised crown Aerolites which with .030 gasket give 8:0:1 compression ratio. Run in and check open exhaust power. With test bed silencer check power also non detonating power and ignition advance. Repeat open exhaust power with larger carbs to be supplied by Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} Effect of trepanning round the inlet valves, also going back to the larger size 1.6 dia. Trial of further long duration camshaft when available. We anticipate that on the completion of the above the bed will be converted for installation of B.60 and B.80. | ||