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).
Battery separator wear, comparing the performance of P & R and Exide batteries.
| Identifier | WestWitteringFiles\O\2January1926-March1926\ Scan192 | |
| Date | 22th January 1926 guessed | |
| -4- Contd. The wood and ebonite separators were very bad the ebonite having chafed away leaving just a framework. The wood had been punctured very badly due to the negative plates swelling and the paste pinching through the wood. A large amount of sediment was found which reached up to the plates. Taking time and mileage into consideration the batteries have given about an equal performance, but the P & R is better in respect of the ebonite separators and the positive plates retaining the paste better. This may be accounted for by the Exide cells being loose and therefore subject to more vibration. Attached is a graphical chart showing at a glance the life of the batteries. The horizontal lines represent months. The green vertical strips are the months on bench life tests and the red, months on chassis, with the miles indicated thereon. The blank spaces are time spent standing in laboratory. EFC/G.Johnson. | ||