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).
Production inspection and test log for a Watford Type SW6A Magneto.
| Identifier | ExFiles\Box 65\3\ scan0423 | |
| Date | 3rd February 1928 | |
| X.8781m. WATFORD TYPE SW6A MAGNETO. X.7791 PRODUCTION INSPECTION AND TEST TABLE HEADERS: Date, Magneto No., (1) Remarks., (2) Range (degrees) >=64°, (3) Remarks., (4) Tangl. Force 1 to 2 lbs., (5) Remarks., (6) Remarks., (7) Min. sparking speeds (a) <=20 (b) <=60 (c) <=90 TABLE DATA: 4-6-29, 118713, OK, 66°, OK, 1/2 lb., OK, OK, 25, 70, 125 4-6-29, 118715, OK, 67°, OK, —, OK, OK, 30, 70, 120 6-6-29, 118714, OK, 66°, OK, 1 1/2, OK, OK, 26, 60, 116 6-6-29, 118716, OK., 66°, OK, —, OK, OK, 30, 65, 120 (Note: Fitted with Tungsten points) 8-1-30, 118717 TP, OK, 60°, OK, —, OK, OK, 100, 120, 150 13-1-30, 118716 TP, OK, 59°, OK, —, OK, OK, 95, 125, 210 7-2-30, 118714 TP, OK, 61°, OK, —, OK, OK, 90, 112, 170 8-2-30, 118716 TP, OK, 61°, OK, —, OK, OK, 105, 126, 205 BOTTOM LEFT: 3.2.28. | ||