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).
Dynamo output for a 'Phantom II' on a 'Bensport' and requesting further testing based on temperature rise.
| Identifier | ExFiles\Box 62\3\ scan0334 | |
| Date | 2nd March 1933 | |
| WST 6066 Hs{Lord Ernest Hives - Chair}/Wst. C. E.{Mr Elliott - Chief Engineer} BY/RD1/W.2.3.33. DYNAMO OUTPUT. "PHANTOM II" DYNAMO ON "BENSPORT". An examination of dynamo output curves indicates that the position of our control brush is fixed by allowing the output to rise together with the voltage until we get a 65°C.rise in temperature. We then produce a curve which we say is what the machine will give when the voltage is held down to 14. In this condition the temperature rise is something less than 65°C. It would, therefore, appear that as we only permit the machine to give its maximum output with the voltage at 14, we could re-set the control brush to allow the temperature to rise to an amount which we shall call "safe", i.e. 60°C., and thereby obtain greater output. It would also appear that now we have more than one rate of charge, the method of fixing the control brush based on temperature rise at maximum volts, should be revised and we could base it on temperature rise at 14 volts. Would you, therefore, please run a machine to determine :- (a) the temperature rise of a standard machine at 14 Volts. (b) assuming a temperature rise to be below 60°C, the maximum output with a 60°C.rise. BY/RD. | ||