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 from S. Smith & Sons regarding a dynamo and starter for the Goshawk Engine, discussing modifications for an earthed system and doubts about the starter's power.
| Identifier | ExFiles\Box 51\5\ Scan122 | |
| Date | 9th September 1921 | |
| X43425 CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR BOARD Telephone: WILLESDEN 2335-6-7. Code A.B.C. 5TH Edition. Telegrams: SPEEDOFAC, CRICKLE, LONDON. S. SMITH & SONS (M·A) LTD MANUFACTURERS OF MOTOR ACCESSORIES. Branches at NEW YORK, BUENOS AIRES, PARIS, BRUSSELS, THE HAGUE, MILAN, CAPE TOWN, JOHANNESBURG, MELBOURNE, SYDNEY, WELLINGTON, SINGAPORE, BANGKOK, SOURABAYA, Etc. Agencies in all civilized countries SHOWROOMS: 179-185, GT PORTLAND ST, LONDON, W.1. And at 122, ALMA STREET, BIRMINGHAM. 12, JACKSONS ROW, MANCHESTER. 141, BATH STREET, GLASGOW. 5A BRUNSWICK STREET, BELFAST. CENTRAL WORKS, Edgware Rd, Cricklewood, London, N.W.2. OUR REF: ACL/MM. 9th September, 1921. Messrs. Rolls Royce, Ltd., D E R B Y. Dear Sirs, X.43425. X.4359S. For the attention of Mr. E. {Mr Elliott - Chief Engineer} Fowler Clark/ We are in receipt of your favour of the 8th inst, with reference to the small dynamo and starter which we are preparing for your Goshawk Engine. We note that you are interested in an earthed system, and would say that this does not present any great difficulty. On the dynamo we replace the mica insulating strip beneath the negative brush box by a brass strip of equal thickness, and on the starter we earth one of the terminals on the starter frame bringing out only one terminal. It would be a little difficult to alter the machines which we have now practically ready for you, but in future machines we can arrange to do this. RECD. You will remember that from time to time we have pointed out that our Model 5S Starter is not in our opinion sufficiently powerful to turn the engine on which you are about to fit it with the small gear ratio of 8 to 1. We would say that the machine we are sending you is slightly more powerful than our standard, but we are still doubtful as to whether it will do what is required of it. We shall be sending you both the dynamo and starter within the next two or three days. Yours faithfully, p.p. S. SMITH & SONS (M.A) LTD. Archibald C. Lock Manager, Electrical Department. [Stamp]: RECEIVED FC SEP 13 1921 [Logo]: NATIONAL SCHEME FOR DISABLED MEN | ||