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).
Air Ministry letter granting airworthiness approval for Watford S.F.12-2 magnetos fitted to F XIV MS engines.
| Identifier | ExFiles\Box 43\4\ Scan299 | |
| Date | 1st August 1930 | |
| COPY AIR MINISTRY London W.C.2 August 1930 887498/28/R.D.E.3.a Type Approval of S.F.12-Magneto on Rolls-Royce F XIV MS ENGINE Gentlemen, I am directed to refer to my letter of the 11th July, granting provisional type approval for the Watford A.F.12 and S.F. 12-2 magnetos. A satisfactory report has now been received on the type test of two S.F.12-2 magnetos when fitted to a Rolls Royce F XIV MS engine, which satisfactorily completed a 100-hour type test in accordance with the conditions laid down in A.P.840. Airworthiness approval is, therefore, granted for the Watford S.F.12-2 magnetos when fitted to Rolls Royce F XIV MS engines, in accordance with Air Navigation Orders and Directions. I am, Gentlemen, Your obedient Servant (Signed) Andrew A.Ross Assistant Director R.D.E. for Director of Technical Development. Messrs. North & Sons Ltd. Whippendell Road Watford. ENCLOSURE NO 362 | ||