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).
Comparison table of magneto tests, detailing volt-ampere capacity and figure of merit.
| Identifier | ExFiles\Box 4\5\ 05-page337 | |
| Date | 21th April 1925 | |
| MAGNETO TESTS, VOLT AMPERE CAPACITY AND FIGURE OF MERIT. Magneto. | Type. | No. | Volt-ampere capacity | Figure of merit. ---|---|---|---|--- American Bosch. | B.6. | 3002650 | 53.3 | 4.84 American Bosch. | ZR.6. | 299874 | 37.3 | 2.47 American Bosch. | ZR.6. | 3385100 | 44.7 | 2.90 Robert Bosch. | ZR.6. | 2571556 | 37.9 | 2.08 Eisemann. | GN.6. | 628380 | 55.0 | 3.25 Conner. | CM.1 | 8263 | 42.25 | 2.62 B.T.H. | FM.6. | R311941 | 32.9 | 3.21 Watford. | EO.6. | 46993 | 34.6 | 2.72 21.4.25. | ||