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).
Clarifying a discrepancy with received U.S.A. Bosch ignition system coils.
| Identifier | ExFiles\Box 61b\4\ scan0108 | |
| Date | 22th December 1926 | |
| To OY. from EFC. X4275 EFC1/T22.12.26. RE U.S.A. BOSCH IGNITION SYSTEM. RECENTLY SENT TO US X4652 Referring to your OY1/E12626 of December 6th, we note your remark that TC.31 coils were sent to us on the double ignition head. The coils received by us are TC.30 for 6 volts - not TC.31. It was assumed (see our EFC2/T8.11.26) that the 6-volt coils were sent intended for 6 volts and 12 volts, but to be used with a ballast resistance on 12 volts. Apparently that is not the case. However, we do not think it is worth while exchanging the coils for 12 volts, as we can obtain the information which we require without taking this course. EFC. | ||