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).
Tests and problems with Bosch magnetos, detailing ignition advance.
| Identifier | ExFiles\Box 4\5\ 05-page005 | |
| Date | 2nd August 1911 | |
| H.R. 140 20.6.11 W 400 8.8.11 G 3723 2A / 2.8.11 Report. Bosch with rollers as tested on 1769, 1767, 1010, advance 2 25° on the fly back. Bosch magnetos with fibre pad on problems 23° advance on flywheel. | ||