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).
Graph plotting electrical performance data from a test conducted after 13,377 miles.
| Identifier | ExFiles\Box 54\2\ Scan114 | |
| Date | 15th February 1927 | |
| 15 . 2 . 27 155 52 75 A. {Mr Adams} HRS. 101 LBS AVERAGE AMPERES - 6.24 HOURS - 10.25 AMPERE HOURS - 64.0 .634 1.80W AFTER 13377 MILES | ||