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).
Test and inspection record for Watford Type R.O.1 magnetos.
| Identifier | ExFiles\Box 57\2\ Scan214 | |
| Date | 20th December 1926 | |
| X. 5790 X.5781m. WATFORD TYPE R.O.1. MAGNETO. X.5790. Column Headers: Magneto No. Remarks. (1) Primary gaps. (1a) Range. (2) (3) Max. & min. forces. 2 & 4 lbs. (4) (5) (6) Speeds. (a) 250 (b) 165 (c) 140 Row 1 Data: Magneto No.: 93284. Remarks.: O.K. Primary gaps.: .012" Range.: 59° (2): O.K. Max. & min. forces.: 2½ (4): O.K. (5): O.K. Speeds (a): 210 Speeds (b): 165 Speeds (c): 140 Row 2 Data: Magneto No.: 94311. Remarks.: O.K. Primary gaps.: .014" Range.: - (2): O.K. Max. & min. forces.: - (4): O.K. (5): O.K. Speeds (a): 150 Speeds (b): 130 Speeds (c): 100 20.12.26. | ||