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 testing procedures and the dispatch of aerolite pistons and L-section rings.
| Identifier | ExFiles\Box 155\2\ scan0236 | |
| Date | 14th July 1938 | |
| -3- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}10/MH.{M. Huckerby}14.7.38. GENERAL - Cont'd.{John DeLooze - Company Secretary} Together with the above despatch the set of - 4¼ litre tin plated aerolite pistons. 12 'L' section rings for 3½ litre which have been completed. NO.2 TEST HOUSE. BORE WEAR RIG. WRAITH III. NO.1. Continue with 50 cycles of starts and stops under following conditions - Run at 1500 r.p.m. water temp. at 80°C and oil as normally warmed up for period of ½ hr. then shut down for ¾ hr. during which time engine should be cooled off, not too rapidly, but should be cold, both oil and water, by when it is time to start again. Run straight up to 1500 r.p.m. and keep mixture normal until warmed up by use of choke control. SINGLE CYLINDER. Ramp head with flat topped piston is now ready and should be checked for capacity to ensure that compression ratio is correct 7.5 : 1. Check for max. power up to 4000 r.p.m. giving min. advance for maximum power. Take curve, giving power loss to cut out detonations by retarding the ignition giving the actual advance. These tests to be run on Shell and Redline. An alternative ramp head will be ready which requires the raised crown piston and identical tests should be carried out. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||