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).
Investigation into the output of two dynamos, JU.95 and RE.25, with one found to have excessively high output.
| Identifier | ExFiles\Box 70\3\ scan0233 | |
| Date | 31th March 1926 | |
| X8783 To BY.{R.W. Bailey - Chief Engineer} from EFC, c. SFT{Mr Swift}/Mr. Brock. EFC3/T31.3.26. RE DYNAMOS JU.95 & RE.25 - EX CHASSIS 89-MC and 71-RC{R. Childs}, respectively. Reference your note BY8/G29.3.26, we have received these two machines, the performance of one of which, e.g. JU.95, we have investigated fairly completely. We find that this machine has an output which is certainly not in excess of normal, but if anything a little bit below, and we see no reason why this machine should have caused burning out of side lamps any more than any of the machines which are now going out on production. We cannot find any fault with the machine, and in the ordinary way this would have been passed by us for production. In the case of the other machine, however, RE.25, the output is definitely too high. In order to determine this it has so far been given a short run on the bench, only long enough to prove that the output is high. The peak output on our schedule voltage is 14.4 amperes as against a normal value of about 11.5. It is suggested that this machine would certainly have too large an output to put on a car. We are quite prepared to have this machine fitted to an experimental car and run to see if the side lamps burn out, if you consider we shall learn anything further thereby. Neither of the machines has been touched by us in any way beyond running and taking observations. As to whether the side lamps would be burnt out would appear to depend | ||