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).
Table detailing the results of magneto tests, including volt-ampere capacity and figure of merit.
| Identifier | ExFiles\Box 4\5\ 05-page336 | |
| Date | 21th April 1925 | |
| MAGNETO TESTS, VOLT AMPERE CAPACITY AND FIGURE OF MERIT. Magneto. Type. No. Volt-ampere capacity. Figure of merit. Watford E06 48919 37.6 2.91 " " 50410 20.8 1.63 " " 73970 33.4 2.67 " " 73972 33.1 2.64 " R.C.1. 3 21.2 2.73 " " 67542 29.1 3.76 " E.O.6d. 82558 32.8 Lag mag.1 21.4.25 | ||