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 of results from magneto performance tests.
| Identifier | ExFiles\Box 4\5\ 05-page157 | |
| Date | 19th July 1922 | |
| C.A.P. X.430 - TABLE OF RESULTS OF MAGNETO PERFORMANCE. Date. | Magneto. & Co. | Type | X. No. | (1) Height (lbs) | (3) Air gap (Inches) | (4) H.T. safety gap (mm) | (6) Platinum gap (Inches) | (9) Range | Make ratio. | (13) Utility test spark length (mm) (a) | (b) | (c) | (d) ---|---|---|---|---|---|---|---|---|---|---|---|---|--- - | Eisemann. | GN.6 | 179 | 16.9 | Unobtainable. | 7.5 | .013 | 30 | .841 | 8.7 | 8.7 | 8.4 | 6.6 - | U.S.A. Bosch. | DUZ.6. 33637C! | 4285 | 14.4 | " | 8.5 | .016 | 35 | .870 | 8.5 | 8.5 | 8.0 | 7.0 23.11.21. | * | ZR.6 Ed.{J. L. Edwards}19 3851C0. | 3916 | 15.4 | .003 | 8.6 | .016 | 36 | .870 | 8.5 | 8.0 | 6.7 | 5.3 25.4.22. | Watford. | E06c 50410. | 4181c. | 12.8 | .006 | 7.6 | .016 | 33 | .881 | 6.5 | 5.3 | 3.5 | 2.4 19.7.22. | * | EL06 55044 | 4279 | 17.7 | Unobtainable. | 10.0 | .011 | 62 | .882 | 6.75 | 6.75 | 6.5 | 4.0 | ||