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 from Chloride Electrical Storage Company detailing battery specifications and alternatives.
| Identifier | ExFiles\Box 58\4\ Scan118 | |
| Date | 4th September 1933 | |
| THE Chloride ELECTRICAL STORAGE COMPANY LIMITED -2- 4th September, 1933. Messrs. Rolls-Royce Ltd. Thickness of positive plates - 1/8" " " negative " - 1/8" intermediate and end. Plate pitch - 1/2". Capacity - 75 amp.hrs in 20 hrs. to 1.80 volts per cell. In the case of both the 6XSL11/1L and the 6XSL9/1L batteries, it should be borne in mind that as these are of a special design it would not be possible for overseas users to get them replated in emergency with elements of any of our standard types. In view of this you might prefer to consider an alternative proposed battery which complies with the suggestions made in the last paragraph of your letter. This type would be known as the 6XHR11-1L and the container would be so designed that our standard XC15 elements (which are almost universally obtainable) could be fitted. The 6XHR11-1L would be made up on similar lines to the 6XSL11/1L shown in our drawing No. GA57940, but using plates 4 7/8" in height instead of 5 1/2". The technical data would be as follows:- Battery Type 6XHR11-1L Assembly - Monobloc ebonite container with or without moulded ebonite cover. Intercell Connections. - Lead coated copper, bolted to terminal pillars. Alternatively - Solid lead connectors burned integral to the terminal pillars may be employed, and this would have the advantage that our standard XC15 elements could be fitted in case of necessity without having to modify the existing coupled cable ends. Separation - Wood and ebonite. Overall Dimension. - 19 7/16" long x 6 3/4" wide x 9 9/16" high without cover, or 10 3/8" high with cover. Weight. - Without cover 73 lbs dry or 82 lbs with acid and charged. Weight of cover 3 lbs. Capacity - 78 amp.hrs in 20 hrs. to 1.80 volts per cell. Thickness of positive plates - 1/8" " " negative " - 1/8" | ||