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).
Letter from Autovac Manufacturing Co. Ltd about a new fitting to resolve engine speed variations at closed throttle.
| Identifier | ExFiles\Box 40\4\ Scan110 | |
| Date | 13th July 1925 | |
| x3529 THE Autovac MANUFACTURING CO. LTD HEATON NORRIS STOCKPORT TELEPHONE: Nº 3080 TELEGRAMS: AUTOVAKING STOCKPORT DIRECTORS J.{Mr Johnson W.M.} HIGGINSON H.{Arthur M. Hanbury - Head Complaints} ARUNDEL J.A. CHARLTON G.A. GASTALL YOUR REF. Hs{Lord Ernest Hives - Chair}/AJL1/LG. OUR REF. JH/LG. Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. 13th.July 1925. Dear Sirs, With further reference to your letter of May 28th. re variation of engine speeds at closed throttle when the Autovac is functioning, I have designed a fitting to take the place of the Suction Elbow, which is illustrated on the attached sketch. This fitting restricts the volume of carburetted air taken from the Autovac when same is functioning at closed throttle, but does not come into action when the depression in the induction pipe is less than 6" of mercury. I propose to send our representative over to demonstrate the fitting and shall be pleased if you will kindly let me know the most convenient date, about 12 o'clock. Yours faithfully, J.{Mr Johnson W.M.} Higginson Director. | ||