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).
Enquiry response detailing the materials of gear wheels in dismantled Watford IS.12 Aero Magnetos.
| Identifier | ExFiles\Box 43\4\ Scan175 | |
| Date | 19th August 1929 | |
| X4021 MR. Jacques A.I.D. from EFC. c. to Mr. Herriot A.I.D. EFC1/AD19.8.29. X.4021. WATFORD IS.12 AERO MAGNETOS Nos. 98033/4 ex F.14-13. As a result of an enquiry by the A.I.D. as to the material of the gear wheels on these magnetos, we have partially dismantled these magnetos to ascertain this. We find that the large distributor gear wheel is made of continental bakelite, and the rotor pinion of steel (presumably M.S.). This will also confirm that you will let us know whether you require these magnetos to be returned to Messrs. North for re-assembling and testing or whether same is to be carried out here. EFC. | ||