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).
Letter discussing the optimal arrangement of scraper rings for RR.53 pistons.
| Identifier | ExFiles\Box 86\2\ scan0154 | |
| Date | 18th November 1933 guessed | |
| - 2 - In respect to scraper rings, we are arranging for the RR.53 pistons to be fitted with rings having lands equal in width to 50% of the total width of the ring. The first rings you had were proportioned so that this dimension was 40% of the total width, and the second set were such that it was 60%. We think that these three ratios should cover a sufficient range to determine which is the optimum arrangement. Yours faithfully, pp THE LIGHT PRODUCTION CO. LTD. L.R.P. Brooks GENERAL MANAGER. | ||