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 results log for E.W.6 magnetos, comparing performance across nine different armatures.
| Identifier | ExFiles\Box 65\3\ scan0355 | |
| Date | 16th April 1929 guessed | |
| E.W.6. MAGNETO. X7791 [TOP TABLE] Headers: Armature, Plat., N.o1, Tung, Plat., N.o2, Tung, Plat., N.o3, Tung, Plat., N.o4, Tung., Plat., N.o5, Tung. Row: High speed Data: 5,000 | Miss 800 -3,500 ok after at 30° to 5,000 | 5,000 | 5,000 | 5,000 | Miss 1,000 -3,000 F.R. ok after at A & 30° | 5,000 | 5,000 | 5,000 | MISSES. BADLY. Row: Low speed Sub-row A: 50 | 60 | 40 | 45 | 50 | 60 | 50 | 60 | 50 | 65 Sub-row 30°: 70 | 80 | 70 | 70 | 80 | 80 | 90 | 90 | 90 | 100 Sub-row R: 115 | 140 | 100 | 110 | 120 | 125 | 110 | 120 | 140 | 160 Row: Leak Data: Rolls Royce specification gap. leak .4 megohm. Row: Advance Lead 1 (High) Lead 2 Data: — | — | 900 | — | — | — | — | — | — | — Row: Retard Lead 1 (Low) Lead 2 Data: 220 | 250 | 180 | 250 | 250 | 280 | 200 | 250 | 250 | 400 Row: Contact breaker. (flashing) Data: normal | Bad R to 30° | Normal. | Bad R to 30° | Normal | Bad R to 30° | Normal. | Bad on R.{Sir Henry Royce} | Bad. | Very bad. [BOTTOM TABLE] Headers: Armature, Plat, N.o6, Tung, Plat, N.o7, Tung, Plat, N.o8, Tung, Plat, N.o9, Tung Row: High speed Data: 5,000 | Miss on R.{Sir Henry Royce} | 5,000 | 5,000 | 5,000 | Miss on R | 5,000 | 5,000 Row: Low speed Sub-row A: 50 | 60 | 50 | 80 | 40. | 55 | 40 | 65 Sub-row 30°: 85 | 90 | 80 | 95 | 60 | 70 | 75 | 80 Sub-row R: 120 | 120 | 120 | 125 | 100 | 110 | 105 | 120 Row: Leak Data: (no data) Row: Advance Lead 1 (High) " 2 Data: — | — | 200 | — | 2,800 | 2,800 | — | — Row: Retard Lead 1 (Low) " 2 Lead 1 Data: 200 | 250 | 300 | 500 | 230 | 300 | 230 | 400 Lead 2 Data: — | — | 340 | 390 | 200 | 250 | 220 | 270 Row: Contact breaker flashing Data: Normal. | Bad R.{Sir Henry Royce} | Normal | Nor. | Nor. | Bad. R.{Sir Henry Royce} | Nor. | Nor. | ||