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).
Coil mileage tests, concluding on the benefits of an improved coil design with a Stabalite case.
| Identifier | ExFiles\Box 45\4\ Scan181 | |
| Date | 24th July 1923 | |
| Contd. -2- EFC1/T24.7.23. Coil. TG1. 3714 miles on 7-GII. TG2. 1618 miles on 3-GII. 1TG3. 466 miles on 4GII and several hundred miles on 5-GII. at West WitteringHenry Royce's home town. 2TG3. Several thousand miles on 2GII. 3TG3. 683 miles on 4-GII. GI. 5TG3. 5875 miles on 7-GII. It is therefore considered that we have had sufficient running of the improved coil, considered apart from the material of the case, to be able to say that the improved insulation of the primary and the modified dimensions of the case, represent a distinct improvement when combined with the use of a case made in Stabalite. 1804 EFC. MADE AT CROXLEY | ||