The testing of French Accu-Slem batteries for use on chassis in France.
| Identifier | ExFiles\Box 164\4\ img117 | |
| Date | 11th September 1933 | |
| x6006. C. For. From Hs {Lord Ernest Hives - Chair} /Wst. c. to Hm. {Capt. W. Hallam - Head Repairs} (Paris.) c. to E. {Mr Elliott - Chief Engineer} Da. {Bernard Day - Chassis Design} c. to By. {R.W. Bailey - Chief Engineer} WHR. {Mr Wheeler} Re. BATTERIES FOR FRENCH R.R. CHASSIS. As a result of correspondence which passed between us and our Paris depot regarding electrical accessories on R.R. chassis imported into France we arranged to test for Paris a suitable French battery which could be fitted to our chassis in France, instead of the English batteries which under the French electrical quota system might be excluded. We decided that the French Accu-Slem battery was the best obtainable and Hm. {Capt. W. Hallam - Head Repairs} arranged for two batteries of dimensions suitable for our 20/25 and Phantom II chassis to be sent to us for a quality test and examination etc. We have now given these batteries a thorough test both on experimental chassis and on the bench in the laboratory and our report is as follows :- 12 volt battery 20/25 HP. size. This battery was given its first charge, discharged and then re-charged. After this a capacity test was taken at 10 ampere-hour rate discharging to 10.8 volts which gave a capacity of 63.9 ampere hours. A high rate discharge was next carried out, this lasting for 9 minutes discharging to 8 volts. This high-rate discharge did not come up to the R.R. standard which stipulates that the current from a battery on high-rate discharge should not fall below 104 amperes before 6 mins. This battery had fallen to 104 amperes after only 15 seconds had elapsed and after 6 mins. had fallen to 101 amperes. The R.R. standard Exide and Dagenite batteries give far in excess of this, as much as 50 to 100% with regards to time and in some cases even more. | ||
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).