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).
Proposal to test a 20 HP dynamo commutator made from 57 segments of annealed copper, including relevant blueprint references.
| Identifier | ExFiles\Box 50\5\ Scan302 | |
| Date | 31th March 1924 | |
| X.4333. BY {R.W. Bailey - Chief Engineer} /RD5/ML.31.3.24. X.4610. X.4333. DYNAMO COMMUTATOR - 20 HP. It is proposed to test out a dynamo having its commutator made of annealed copper and having 57 segments, so we therefore send you herewith the following blueprints :- D.51288 - Commutator Bar. D.51289 - " Assembly. D.51289 - " L.O.P. It is possible that you may have some special section copper in stock, as this size was ordered for D.51071 being the comm. bar for a 57 segment comm. in hard drawn copper. If you will send the material to this office, Mr. Marriott will get it annealed in the Laboratory as before. BY {R.W. Bailey - Chief Engineer} /RD. | ||