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).
Summary of the allocation and fitting of American ball bearings to various Merlin engines for development tests.
| Identifier | ExFiles\Box 115\2\ scan0608 | |
| Date | 20th November 1940 | |
| 1020 To Hs.{Lord Ernest Hives - Chair} from HPS{Horace Percy Smith - Experimental Factory Mgr}/RS.{Sir Henry Royce's Secretary} c. to Rm.{William Robotham - Chief Engineer} c. to Lov{Mr Lovesey}/KBH. c. to Lov{Mr Lovesey}/McK. c. to HPS.{Horace Percy Smith - Experimental Factory Mgr} HPS{Horace Percy Smith - Experimental Factory Mgr}/RS.{Sir Henry Royce's Secretary}1/AW.20.11.40. MERLIN ENGINES. Ball Bearings Supplied from America. Further to our HPS{Horace Percy Smith - Experimental Factory Mgr}/RS.{Sir Henry Royce's Secretary}2/JW.12.11.40., in connection with the above; we give below, for your information, a summary of the position of American bearings, allocated and fitted to date. 1. Merlin No.4549 - (R.M.5.S) This engine is being rebuilt for further test, following inspection after 20 hours bearing development test. 20 U.S.A.bearings are fitted, including 5 SKF. and 4 MRC.types. 2. Merlin No.6777 - (R.M.2.S.M) Bearing development tests are in progress, 16 hours having been completed to date. 30 U.S.A. ball bearings, including 9 SKF. and 4 MRC. types are included in the specification. 3. Merlin X. No.19. The above engine is being prepared for development tests; 18 American bearings, including 6 SKF. and 2 MRC. types are being fitted. 4. Merlin XX. No.505. This engine is also in preparation for development tests; the specification includes 30 American bearings, 9 SKF. and 4 MRC. types. - continued - | ||