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).
The production of three experimental coils based on Mr. Brock's No.3 coil design.
| Identifier | ExFiles\Box 45\4\ Scan142 | |
| Date | 3rd February 1923 | |
| X4079 To EFC. BY/Ds2/LL3.2.23. RE X.4079.b. Re your EFC1/T2.2.23, will you kindly note that we have arranged with Mr Brock to produce 3 coils similar to the ones known as his No.3 coil. These will have square bases and when trying out should be fitted on the top of the engine. As soon as we can obtain the correct paper from Messrs.Attwater and can get mouldings made to the new design, we will arrange to have two or three of these built up for you to experiment with. BY/Ds. Ds [STAMP: RECEIVED FEB 9 1923] | ||