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).
High-rate discharge test and comparison of various battery types.
| Identifier | ExFiles\Box 54\1\ Scan194 | |
| Date | 5th December 1922 | |
| ROLLS-ROYCE LIMITED. INSTRUCTIONS. Re: J B 85. After this a High Rate Discharge through an invariable external resistance 100W was taken. The initial amperes were 103. Time to 100 amperes = 4.5 min " " 90 " = 14.7 " " " 80 " = 16.6 " Cell P.D's. were taken at 100 & 90 amperes approx. Condition of Battery. | Condition of Battery | Exide | P&R | Exide | Fuller | P&R | Oldham | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Open circuit but discharged | 1.98 | 1.94 | 1.98 | 2.02 | 1.9 | 1.9 | | Charging at 9 amperes | 2.6 | 2.9 | 2.6 | 2.8 | 2.9 | 2.7 | | High Rate discharge 100 amperes | 1.8 | 1.6 | 1.8 | 1.8 | 1.6 | 1.6 | | 90 amperes | 1.7 | 1.35 | 1.7 | 1.75 | 1.30 | 1.25 | It will be seen that the P&R & Oldham have the highest resistance. This Sheet must be filed on completion of the work. Printed form codes: RR 300 (20 Bks.) (SK 354 5-12-22 MP 264049) | ||