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).
Test report on two battery capacity and ampere-hour meters from C.G. Vokes & Co.
| Identifier | ExFiles\Box 54\2\ Scan235 | |
| Date | 10th July 1928 | |
| RR 238 (150 BKS.) (D9 431-8 12 24) MP 306975 X4457 ROLLS-ROYCE, LTD. INSTRUCTIONS. To: E.W.H. Order No.: J.E. 113. Customer's No.: X664 Battery Capacity, Ampere hour Meter from Messrs C.G. Vokes & Co of Putney. Two of these instruments have been received from the above firm for test. They do not compare very well as the black instrument reads 5% higher than the nickel one. The nickel one was chosen for the tests to be made & readings were taken whilst the battery was discharging at the 10 hours rate. voltage. 14.8 13.5 12.6 12.4 12.3 Reading. full scale. blue 77 yellow 60 voltage 11.8 11.5 11.4 9.9 Reading 30 10 Red yellow zero. When the instrument is reading full scale the battery is only approx 80% charged & consequently it would never get fully charged if the charge was switched off when the instrument reached full scale. Signed: (cont'd. {John DeLooze - Company Secretary} ) This Sheet must be filed on completion of the work. | ||