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).
Comparing the dimensions and properties of Redmanol and stabalite coil cases.
| Identifier | ExFiles\Box 45\4\ Scan301 | |
| Date | 21th July 1926 | |
| X4079 21.7.26. To EFC. From Mr.Brock. Herewith six Redmanol coil cases as per your request. If you compare the insulating properties of this material with cases of stabalite will you please remember the bore of the redmanol ones is .050 larger than stabalite ones. This means that the section of the latter is .025" greater than redmanol. We, of course, benefit by having a larger air space in the coil. (sgd) E.J.Brock. | ||