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).
Proposal for a universal battery for the 20/25 and Japan 3 chassis.
| Identifier | ExFiles\Box 58\4\ Scan020 | |
| Date | 22th January 1932 | |
| -2- Hs{Lord Ernest Hives - Chair}/Wst.1/AD22.1.32 contd. 20/25 and Japan 3 chassis. For a universal battery for these chassis, the Chloride Co. recommend two 6-volt units in place of our existing 12 volt unit. The type will be 3XR7-1H and again will have a standard container similar to that used extensively for other batteries. The proposed specification of this battery is as follows :- Ebonite moulded container without lid{A. J. Lidsey}, having 3 positive plates and 4 negatives of the same thickness as the 40/50. The separation will be wood and ebonite. Deposit space 1½". Weight per 6 volt unit charged, 40 lbs. Capacity 52½ ampere hours on a 20 hour rate. Overall dimensions of each 6 volt unit 6.15/16" wide, 9" long and 9¾" high. Burnt on cell to cell connections and E.M.M.T. taper terminals. The battery will have the same life and durability as our present standard 20/25 HP. chassis and the same capacity and weight, but will have a longer overall length. With regard to our existing 20/25 battery type 6-XSM7-1L the Chloride Co. could cheapen this by fitting cheap thin plates but the life would only be 3 years and they strongly depreciate any move in that direction. Messrs. Peto & Radford are similarly making us up a 40/50 universal type battery and we propose to visit them similarly in order to inspect tests on the battery, particulars of which we shall then be enabled to report in order that comparisons may be made with the Exide battery. A good feature we consider of the adoption of standard containers etc. is that both our battery supply Co's. will be entirely free from any agreement between each other and healthy competition should result, ourselves benefiting thereby. Hs{Lord Ernest Hives - Chair}/Wst. | ||