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).
Comparison of the general behaviour of P & R RRI1-1 and Exide 6RR5-2 40/50 HP standard batteries.
| Identifier | ExFiles\Box 54\2\ Scan084 | |
| Date | 17th March 1926 | |
| EFC. {E. Fowler Clarke - Electrical Engineer} JC.15. COMPARISON OF GENERAL BEHAVIOUR OF P & R RRI1-1 & EXIDE 6RR5-2. 40/50 HP. STANDARD BATTERIES. Both of these batteries were received on 16.6.24 in a fully charged condition and were put through our Routine Bench Tests. In the case of the P & R the following results were obtained :- First a low rate discharge was taken through an invariable external resistance of 1.80 ohms and 52.8 ampere hours were realised. Then followed a high rate discharge through an invariable external resistance of .100 ohm. Initial amperes = 110.3 Time to 104 amps. = 9.4 mins. " " 100 " = 12.8 " " " 90 " = 15.4 " " " 80 " = 17.7 " A further low rate discharge was then taken and 53 ampere hours were realised. In the case of the Exide on the 1st. low rate discharge 86.6 ampere-hours were realised and on the high rate discharge - Initial amperes = 110.0 Time to 104 amps. = 11.5 mins. " " 100 " = 16.6 " " " 90 " = 21.9 " " " 80 " = 23.1 " Following this was a further low rate discharge when 80.6 ampere hours were realised. Contd. | ||