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).
Instructions detailing the automatic advance curve specifications for a magneto.
| Identifier | ExFiles\Box 48\2\ Scan138 | |
| Date | 29th June 1920 | |
| 2M 233(30 BKS) [SHST.29-6-20.] MP 224350 ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. Wa {Mr Wallis} 62 (2) Customer's No. No. 28533. This magneto commences its auto-matic advance at a speed of 580 r.p.m and attains 5° at a speed of 690 rpm 10° - - 970 " 15° - - 1260 " 20° - - 1500 " 25° - - 1810 " 30° - - 2180 " and the maximum amount of 33° at a speed of 2600 rpm. Hand range = 20° Total range = 53° Signed H.E.W. This Sheet must be filed on completion of the work. | ||