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).
Specification for an 'Exide' battery for 40/50 HP cars.
| Identifier | ExFiles\Box 54\2\ Scan014 | |
| Date | 25th January 1924 | |
| COPY. THE CHLORIDE ELECTRICAL STORAGE COMPANY LIMITED. CLIFTON JUNCTION, NR MANCHESTER. ECM/EH. 25th January. 1924. Messrs. Rolls-Royce Ltd., D E R B Y. SPECIFICATION of "EXIDE" BATTERY FOR ROLLS ROYCE 40/50 h.p.CARS. Type of Battery - 6-RR5-1. Dimensions over-all - 20¼" x 6¾" x 10.1/16" high. Thickness of Tray - Sides...... ⅜" Ends & Base 9/16" Central Spacer ½" to be provided covering two tie rods of cycle spokes. Dimensions of Cell - 3¾" x 5.7/16" x 8½" high. Thickness of Walls - ⅛" Height of Plate Supports - ⅞" Details of Plates. Each cell to be fitted with 5 positives, each measuring 5/16" wide x 5½" long x 5/32" thick; and 6 negatives, the same width and length, but the inner plates to be ⅛" thick and the outer plates 3/32" thick. The plates to be separated by wood and ebonite diaphragms. Capacity of Battery - The battery to have a capacity of 79 ampere hours in 10 hours; 87 ampere hours in 20 hours; 167 amperes for 6 minutes. Weight of Battery - The weight of the battery, complete with electrolyte, to be 100 lbs. Charging Rate - The normal charge rate to be 7 amperes. This applies to bench charging. Under service conditions, the battery would be capable of withstanding a charging rate of 12 amperes when in a fully charged condition. General Remarks. The plates will be identical in design and in superficial and sectional area, with those fitted in the "Exide" XR type batteries on the Rolls-Royce 20 h.p. cars. | ||