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).
The testing and initial assessment of car batteries, including capacity, construction, and a sketch with dimensions.
| Identifier | ExFiles\Box 9\6\ 06-page20 | |
| Date | 26th April 1917 | |
| R.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. -3- EFC4/T21319. Contd. battery, and the acid level in the cells, can be inspected easily when in position on the car. There is a celluloid collar surrounding each vent to facilitate filling vents of celluloid are quite good. We like the appearance & finish of this battery, but it has not, so far, seemed to show up well as regards capacity. The battery came in un-charged, and although given a thorough charge of at least twice the rated ampere hour capacity, at a comparatively slow rate, it has only given about 45 ampere hours discharging at 6 amperes on the second discharge. The makers state, however, they expect this to get better with use. We have not yet discharged the battery at the 10 ampere rate. Density readings cannot be taken. Fuller Battery. x.646 (type S.Q.12/4 B. 53 ampere hour rated capacity). We have just received from the Fuller Accumulator Company, two of their above mentioned batteries, but have not been able to do anything with these so far. Sketch plan arrangement as below:- [SKETCH OF BATTERY] Overall. Length. 1' 8" Breadth. 5½" Height. 9¼" These batteries are made up of ebonite cells placed in a wooden box. To external appearance they look a good job except for the filler holes and vents which seem very poor. We shall have further report to make on these later. | ||