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).
Selection of a suitable dynamo for a chassis, considering American and British options.
| Identifier | ExFiles\Box 61\2\ scan0099 | |
| Date | 16th November 1918 | |
| To R.{Sir Henry Royce} from By.{R.W. Bailey - Chief Engineer} c. to CJ. c. to By/HBO. c. to EFC. c. to EH. X.33/4 By3/DB{Donald Bastow - Suspensions}16.11.18. X.3231. X.3374. X.3412. X294 RE DYNAMO FOR CHASSIS. Referring to your memo R12/G111118 on above question, there can be no doubt that the Bijur Con stant Voltage Sy stem is the best allround proposition for a car lighting and starting scheme. When the scheme was first brought to my notice, I strongly supported it as being worthy of our consideration, but at the moment, I do not see how we can design, build and effectively test a dynamo of our own on these lines, in the short time at our disposal. I am making enquiries to find out if Bijur dynamos are available, but as they are American made, there may be some difficulty in obtaining them, especially in view of shipping shortage. Messrs. Newton Bros. of Derby have a small dynamo for Aeroplane service, which is built under Bijur patents. It weighs 11 1/2 lbs., and developes 500 watts at 3000 r.p.m. This is not far off our actual requirements - 10 amps. at 12 volts at 750 r.p.m. of dynamo, and I am therefore trying to get full particulars of the design and its possibilities. If the machine turns out to be unsuitable, I would recommend either using the smaller Lucas (which I recently submitted) in conjunction with half watt lamps, or else getting Royce Ltd., or Newton Bros. to produce a design for us, as they have facilities for producing this work quickly, and also for carrying out the tests, as it is all a part of their usual routine, while with us, as so many different schemes are demanding attention, it would be very difficult to carry through your ideas to a successful issue in the time available. By.{R.W. Bailey - Chief Engineer} | ||