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 providing the typical output characteristic curve for a 20 HP generator.
| Identifier | ExFiles\Box 51\1\ Scan172 | |
| Date | 13th July 1923 | |
| X4383 EFC {E. Fowler Clarke - Electrical Engineer} 3/T. 13th July, 1923. Messrs. Peto & Radford, 50, Grosvenor Gardens, London, S.W.1. For the attention of Mr. Minchin. Dear Sirs, As arranged with your Mr. Minchin on Monday last, we are now giving you the typical output characteristic curve of our 20 H.P. generator, at the temperature of about 85°C, at which the dynamo would normally be running on the car. On quite the majority of cars, i.e. those working with battery ignition, the actual current going to the battery must be reduced from the amount shown on this curve by roughly 1 1/4 amperes. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||