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).
Change in wire gauge specification for an Automatic Switch's Auxiliary Coil.
| Identifier | ExFiles\Box 64\3\ scan0192 | |
| Date | 7th November 1924 | |
| X8650 To RHC.{R. H. Coverley - Production Engineer} C. EFC. BY/RD1/ML7.11.24. X.8650 - AUTOMATIC SWITCH. EAC II Referring to our memo BY/RD4/ML5.11.24., we instructed you to produce an Auxiliary Coil on the Automatic Switch wound with 26 S.W.G. wire. We are now informed by EFC. (EFC2/T6.11.24) that he is of the opinion that 27 S.W.G. would be suitable, therefore before producing the Auxiliary Coil wound with 26 S.W.G. wire, will you please put in hand one coil having the same heavy winding as originally instructed and 252 turns of 27 S.W.G. (.0164) D.C.C. copper wire. If then this is not suitable we can try the 26 gauge wire. BY/RD. | ||