Battery performance and test readings after a road run.
| Identifier | ExFiles\Box 168b\3\ img282 | |
| Date | 21th September 1920 | |
| JD {J. Draper - Frames} 65 3 P1/RR/N11-7-8 21/9/20. This Battery has now ran 652 miles on the road. Cadmium readings on charge/cell positive 2.35 negative -.25 Specific Gravity 1275 P.D. 2.6 On Low Rate Discharge 76.6 ampere hours were realised at an average current of 6.38 amperes. Cadmium readings on discharge positive 1.95 negative .15 Specific Gravity 1135 P.D. 1.8 The battery was given a full charge + then put on High Rate Discharge Initial amperes = 106.0 Time To 104 " " = 5.0 min " " 100 " " = 10.0 " " " 90 " " = 16.2 " " " 80 " " = 17.3 " Cadmium readings on discharge positive 1.95 negative .35 Specific Gravity 1200. [Signature] | ||
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).