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 to Joseph Lucas & Co. Ltd. concerning test results of a C.A.V. voltage regulator.
| Identifier | ExFiles\Box 62\3\ scan0390 | |
| Date | 5th September 1933 | |
| 86142 Hs{Lord Ernest Hives - Chair}/Wst.3/MA. September 5th., 1933. Messrs.Joseph Lucas & Co.Ltd., Great King Street, Birmingham, 19. For the attention of Mr.C.E.Robinson. Dear Sir, With reference to the various discussions we have had regarding C.A.V. voltage regulators we beg to say that we have recently received from you one regulator type B2CJ1 for test. We assume that this regulator has a 3 turn series winding as compared with the B2H1 which we understand has a 3½ turn winding. Our test figures taken as usual on a battery shew this regulator to operate cold as follows :- Open circuit volts (initial operation independent of external circuit) = 15.5 volts Subsequent operation on battery = 15.1 to 15.7 volts Current at 13 volts (initial operation)= 16.4 amperes. Subsequent operation = 15.8 to 16.3 amperes. These figures are unfortunately still too high for our requirements as will be seen upon reference to our original specification figures. | ||