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 detailing magneto performance tests according to a new general specification, incorporating automatic advance.
| Identifier | ExFiles\Box 4\5\ 05-page334 | |
| Date | 21th August 1924 | |
| H.E.W X430 X.430. TABLE OF MAGNETO PERFORMANCE TO NEW GENERAL SPECIFICATION. (INCORPORATING AUTOMATIC ADVANCE). | Date of Test | MAGNETO Make | MAGNETO Type | MAGNETO No. | (1) Weight (lbs.) > 15 | (2) Safety gap (mm) (T=12000 V) | + (3) Available range. Total. Auto. Hand. (60°) (30° to 35°) | (4) Remarks | (5) Speed range (RPM) | (6) | (7) Speeds (b) (c) (210) (190) | (8) | (9) Remarks | |---|---|---|---|---|---|---|---|---|---|---|---|---| | 13.7.23 | Scintilla | AM6A | 26485. | 12.5 | 11.5 | 53 33 20 | H.T. brushes soft. Safety gap too large. | - | O.K. | 220 410 | - | Reasonab quiet. | | 21.3.24. | " | " | 34937. | 12.5 | 11.8 | 53 32 1/2 20 1/2 | " | - | O.K. | 150 280 | - | " | | 16.7.24. | " | " | 28531. | 12.5 | 11.1 | 51 32 19 | H.T. brushes soft. Safety gap too large. | - | O.K. | 140 230 | - | V.{VIENNA} quiet. | | 16.7.24. | " | " | 28533 | 12.5 | 11.2 | 53 33 20 | " | - | O.K. | 245 385 | - | " | | 21-8-24 | " | AG6R | 34903 | 14.5 | 11.2 | 57 38 19 | " | - | Rec'd & inspd Sep 6th 1950 O.K. | 160 290 | not comply | Reasonably quiet. | + See separate curves for advance characteristics. + See separate curves for advance characteristics. | ||