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).
Comparison of wire specifications against a standard, detailing material, gauge, length, and resistance.
| Identifier | WestWitteringFiles\Q\2-July1927-September1927\ 78 | |
| Date | 1st September 1927 | |
| Contd. -3- EFC5/T1.9.27. The wire is of pure nickel as in the standard case. The gauge is 33 SWG., as compared with 31 SWG. standard. The new length is 30" as compared with 25" standard. The cold resistance is approximately double. There are more turns in the coil proportionately to the extra length. The mechanical reliability would appear to be of the same order as standard. EFC. | ||