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 a report on continuous current motor design, including bearing schemes and oil retention.
| Identifier | ExFiles\Box 180\M6\ img024 | |
| Date | 9th June 1928 | |
| REG. TELEGRAPHIC ADDRESS: "ROYCE, WEST WITTERINGHenry Royce's home town." TWO WORDS ONLY. TELEPHONE: CHICHESTER 210. STATION - PASSENGER & GOODS: CHICHESTER - 7 MILES. SOUTHERN RLY. "ELMSTEADHenry Royce's home in West Wittering," WEST WITTERINGHenry Royce's home town, NR. CHICHESTER. 9th. June 1928. Mr. Bentley. ROYCE LTD. MANCHESTER. Dear Mr. Bentley, Regarding your long report of 4.6.28., I am very pleased with your remarks, though they condemn most of my suggestions. I am also very pleased with the notes by Mr. Huggins. Although I do not agree with them entirely they contain a lot of sense and therefore I have hopes that we shall get some good from the discussion. Regarding the continuous current motors I think it would be quite unwise to start on the novel design suggested, because although I agree with the arguments contained, I should not expect the motors made to this design to be less costly than the more orthodox design. Moreover it would not pay us to depart from our present practice with the amount of orders we are likely to receive for continuous current motors. I think therefore that there is no doubt your lists and your stock should go ahead with our standard steel type with octagon shaped yoke. I do not think you have got the scheme of bearings right; two objections I have to your proposed scheme: (1) Although each end bearing can take thrust in either direction satisfactorily it would not be satisfactory for worm, spiral bevel, or single helical gears, owing to the amount of slack you must naturally give this arrangement for safety. If you consider that they are suitable for 99% of the cases, the 1% might be specially dealt with, but in our motor work we never use this practice except for magnetos. (2) Of greater importance is the want of oil retaining. This might be made better by providing a housing for the bearing in which the end cover is simply pushed over or bolted in. FIG. 1. FIG. 2. DOWEL OR SOMETHING TO PREVENT TURNING Handwritten notes: Signature: JCB Left Margin: Ackd 12/6/28 Below Date: Copy to Mr Huggins. 2/6/28. | ||