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 specification and performance data for Lucas ER6 magnetos.
| Identifier | ExFiles\Box 40\2\ Scan233 | |
| Date | 5th January 1928 | |
| B/197 JOSEPH LUCAS LTD., PAGE 2. DATE Jan.5th/28. To Messrs. Rolls Royce, Limited. TEST SPECIFICATION & PERFORMANCE OF LUCAS ER6. MAGNETOS. TEST. JUMP SPARK. (MACHINE) BRUSH TYPE MACHINE. Timing range. 60° 60° H.T. Safety Gap. 12- 14 KV. 12 - 14 KV. Leaky plug conditions on a special annular gap with 4 micromhos leak. Fires regularly from 520.RPM. upwards. Fires regularly from 600.RPM. upwards. Regular firing 5.5m/m gaps. O.K. at 5,000.RPM. O.K.at 5,000.RPM. Slow speed performance. Adv. 45. RPM. Adv. 45. RPM. Mid. 65. " Mid. 60. " Ret.115. " Ret.100. " ---------------- | ||