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).
Chart showing electrical performance data recorded after a mileage test.
| Identifier | ExFiles\Box 54\2\ Scan115 | |
| Date | 21th February 1927 | |
| 21 - 2 - 27 159 5X 75 A. {Mr Adams} HRS. 103 LBS AVERAGE AMPERES = 6.34 HOURS = 11.0 AMPERE HOURS = 69.7 .675 1.80 W. AFTER 8231 MILES | ||