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 data table showing battery cell voltages and dynamo performance metrics.
| Identifier | ExFiles\Box 54\1\ Scan070 | |
| Date | 3rd December 1925 | |
| 3.12.25. BATTERY. | NO. | Cell Volts | | | | | | | Dynamo | | | Battery. Volts. | |---|---|---|---|---|---|---|---|---|---|---|---| | | – | 1 | 2 | 3 | 4 | 5 | 6 | + | Temp. °C. | Volts. | Amps. | | | Ex. Std. 6RR.5. | | 2.70 | 2.70 | 2.67 | 2.69 | 2.69 | 2.69 | | 13-62-75 | 17.6 | 11.1 | 16.2 | | Ex. SPL.1. | | 2.34 | 2.30 | 2.31 | 2.34 | 2.31 | 2.30 | | 17-47-64 | 15.2 | 10.1 | 13.9 | | Std. P & R (RR11) | | 2.87 | 2.87 | 2.87 | 2.90 | 2.90 | 2.87 | | 18-59-77 | 19.1 | 12.3 | 17.3 | | Oldham 3. | | 2.83 | 2.85 | 2.80 | 2.78 | 2.71 | 2.80 | | 14-57-71 | 18.5 | 12.2 | 16.8 | | SZ | | 2.81 | 2.70 | 2.81 | 2.67 | 2.80 | 2.88 | | 13-58-71 | 18.3 | 11.8 | 16.7 | | SY. | | 2.65 | 2.83 | 2.61 | 2.81 | 2.88 | 2.80 | | 15-59-74 | 18.2 | 11.8 | 16.6 | | SX. | | 2.90 | 2.65 | 2.65 | 2.89 | 2.61 | 2.69 | | 16-58-74 | 18.1 | 11.7 | 16.4 | | S1. | | 2.65 | 2.90 | 2.62 | 2.89 | 2.65 | 2.90 | | 16-58-74 | 18.2 | 11.9 | 16.6 | | S4. | | 2.65 | 2.91 | 2.45 | 2.91 | 2.63 | 2.91 | | 17-54-71 | 18.1 | 12.0 | 16.5 | Handwritten: Dynamos in standard condition viz 120° 120°. | ||