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).
Difficulties in fitting two-unit batteries into sports cars.
| Identifier | ExFiles\Box 168b\3\ img154 | |
| Date | 18th February 1928 | |
| X7535 P To Mr. from BPE. c. Mr HUEB. c. He. c. Da.{Bernard Day - Chassis Design} EFC3/T18.2.28. TWO UNIT BATTERIES FOR SPORTS CARS. Items of difficulty which have been experienced A.{Mr Adams} In placing the battery in the metal battery box. B. In topping up the battery when in position. (These refer to the chassis with body affixed). (1) The first snag was experienced in lowering the first 6 volt unit into the box as it could only just be got down between the rear battery box support and the vertical board under the back seat. It jammed rather badly and had to be forced down between these. (2) The second difficulty was that owing to the small allowances possible for irregularities in battery and R.R. battery box manufacture, the first unit could only be moved along to the other end with difficulty, the actual jam occurring between the corner pieces and the metal battery box. There was of course a similar difficulty in putting the second unit in place. (3) Having got the second unit in place, there was insufficient room for the end packing pieces as instructed, and unofficial packing pieces had to be used. (4) In regard to putting on the connections, there was no difficulty about the end connections, but the series link as officially instructed was it too long and had to be shortened to render this a convenient job for putting in position. (5) In attempting to get the lid{A. J. Lidsey} of the first unit into position by moving it horizontally over the top of the battery and under the cross member, there was also a tendency for the lid{A. J. Lidsey} to jam between the sides of the box and the two metal corner pieces, as originally instructed. Contact was made with the two terminals of one cell, causing a short circuit (because they were both in contact with the metal battery box). This fault was cured by taking off a small triangular portion of these corner pieces to prevent contact being made with the cell terminals. Having done that there was still a certain amount of difficulty in moving the first lid{A. J. Lidsey} into correct position. With the second there was no difficulty. Contd. | ||