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 detailing the results of comparative tests on four different car batteries.
| Identifier | ExFiles\Box 164\3\ img193 | |
| Date | 5th July 1938 | |
| EXPERIMENTAL DEPARTMENT. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} 15/JH. 5th, July, 1938. Messrs. Peto & Radford Ltd., Dagenham Dock, ESSEX. For the attention of Mr. E.C. Chapman. Dear Sirs, With reference to your letter of the 17th ult., for which we thank you, and further to our letter of the 10th ult. we now send you the promised test results. These results are obtained from tests carried out on the lines detailed in our letter, and on the following batteries. (1) Our standard 25/30 type Dagenite 6HZD11.S. (2) The experimental battery " 6HZD11.G. (3) The 25/30 Exide battery 6XCKR11.SL. (4) The Lucas battery type 12TXW11 taken off an S.S. Jaguar and tried as a matter of interest. It will be seen from these results, that the experimental Dagenite is superior to the standard, from a starting point of view, especially at the lower temperature. In other respects it is about the same. At the same time, it will be seen that the Lucas battery is 4 lbs. heavier than the standard Dagenite, and a little longer in return for which the internal resistance appears to be a little lower, resulting in a slightly better starting performance. The exide battery results are given as a matter of interest. | ||