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 regarding the approval of a Transmitting Water Thermometer, Alteration No.148.
| Identifier | ExFiles\Box 175\4\ img118 | |
| Date | 12th February 1931 | |
| COPY AIR MINISTRY, LONDON. W.C.2. 43519/30/R.D.E.2.b/A.G.F. 12th February 1931. Transmitting Water Thermometer. Alteration No.148. For the attention of Mr. Rowledge. Gentlemen, I am directed to acknowledge receipt of your letter of January 27th, together with blue print No.E.37038, showing a Cambridge transmitting water thermometer. I am further directed to inform you that this type of instrument has been tested at the Royal Aircraft Establishment, and is approved for use on civil aircraft provided the modifications suggested in the R.A.E. Report dated January 28th, are incorporated. A copy of this report was sent to you some days ago to enable you to take action on the instruments being produced for D.T.D. I am, Gentlemen, Your obedient Servant, (Sgd) A.{Mr Adams} Graham Forsyth. Assistant Director/R.D.E. for Director of Technical Development. Messrs. Rolls-Royce Ltd., Derby. | ||