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 testing and modification of Watford IS.12 magnetos for the F.39 engine.
| Identifier | ExFiles\Box 43\4\ Scan313 | |
| Date | 20th November 1930 | |
| Y4021. Mr. Jaques A.I.D. from EFC. c. By.{R.W. Bailey - Chief Engineer} c. Rg.{Mr Rowledge} c. RHC.{R. H. Coverley - Production Engineer} EFC1/AD20.11.30. X.4021. WATFORD IS.12. MAGNETOS FOR TYPE TEST ON F.39. We have now received and tested O.K. magnetos Nos. 98033/4 which you requested should be fitted to the "F" type test engine. The electrical performance of each magneto has been considerably improved and there is now no difference between them, No.98033 having been also fitted with a new modified armature. Both magnetos having now been modified are now right up-to-date and representative of latest Watford aero magneto practice. Will RHC.{R. H. Coverley - Production Engineer} please note that that these machines are therefore now available for fitting to F.39. EFC. | ||