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).
Particulars of coils for the E.A.C. Silent Starter Gear.
| Identifier | ExFiles\Box 64\3\ scan0176 | |
| Date | 20th June 1924 | |
| x 8650 To EFC. BY/RD7/ML 20.6.24. X.8650 - E.A.C. SILENT STARTER GEAR. Referring to your EFC3/T1 7.6.24, the following are the particulars of coils we propose to instruct - (1) Solenoid Unit - Same size as Teaser Winding in Motor Field, i.e. .048 (18 S.W.G) D.C.C. 243 turns M.L.T. 3.83 ins. (2) "Hold off" Coil - one even gauge less than Item 3. i.e. .0148 (28 S.W.G) D.C.C. 196 turns M.L.T. 2.900 ins. (3) Main Switch Coil - Similar to the parallel connected Main Switch 40/50 Chassis i.e. .018 (26 S.W.G) D.C.C. 540 turns M.L.T. 2.86 ins. 26SWG BY RD. | ||