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).
Limited 15° range of reconditioned Watford I.S.12.Aero magnetos and a proposal for their conversion to 30°.
| Identifier | ExFiles\Box 43\4\ Scan161 | |
| Date | 17th April 1929 | |
| Y4021 9 MR. ROWLEDGE. MR. CLARKE MR. DAYMAN MR. HIVES. MR. PRIESTLEY MR. ALLEN A.I.D. APRIL 17th.1929 W/HB{C. E. Harcombe}/E9 WATFORD I.S.12.AERO MAGNETOS 83132/3 The above magnetos were sent here by the Air Ministry after being reconditioned at Messrs Nath & Son. Mr. Clarke reports that the range is only 15°. I have spoken to the Air Ministry and Mr. Emtage R.D.E.3a. is willing to have them converted to 30° if you consider it essential. [Signature] A.I. For D.A.I. | ||