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 dynamo output showing amperage readings at various speeds and electrical loads.
| Identifier | ExFiles\Box 5a\3\ 03-page023 | |
| Date | 3rd March 1931 | |
| 88840 3/3/31 13.B.IV. DYNAMO OUTPUT. With Head, Side & Tail. Table 1: M.P.H. | HOT. | AMPS. 10 | | - 7.5 16 | | 0 20 | | + 2 30 | | + 2.5 40 | | + 2 50 | | + 1 60 | | 0 With Ignition only. Table 2: M.P.H. | HOT. | AMPS. 10 | | 0 16 | | Balanced. 20 | | + 3.5 30 | | + 7.5 40 | | + 7.5 50 | | + 7.5 60 | | + 7.0 With Head, Side, Tail, Windscreen Wiper, Body Lights & Instrument Board. Table 3: M.P.H. | HOT. | AMPS. 10 | | - 11.5 20 | | - .3 23 | | Balanced. 30 | | 0 40 | | - .5 50 | | - 1.5 60 | | - 2.0 Signature: G.H. Hancock. | ||