Letter from W. H. Colt Ltd regarding the testing of bonnet ventilators made from aluminium and brass.
| Identifier | ExFiles\Box 119\3\ scan0180 | |
| Date | 17th November 1931 | |
| 81085. W. H. {Arthur M. Hanbury - Head Complaints} COLT, LTD. BETHERSDEN NEAR ASHFORD - KENT - TELEPHONE BETHERSDEN 6 TELEGRAMS COLT BETHERSDEN KENT BUSH HOUSE ALDWYCH LONDON. W.C.2 LONDON DIRECTOR: I. J. {Mr Johnson W.M.} O'HEA. F.C.I.S. TELEPHONE AND TELEGRAMS TEMPLE BAR 5112 EXTENSIBLE UNITS WHC/KH/K November 17th, 1931. Messrs Rolls-Royce Ltd., Derby. Ref. Hs {Lord Ernest Hives - Chair} /Lid. {A. J. Lidsey} 1/MJ Expl. Dept. Dear Sirs, We have pleasure in advising you that we have forwarded you to-day per parcels post, two bonnet ventilators in aluminium for testing purposes. We are having another pair made in slightly heavier material, in brass. We are of the opinion that aluminium in the gauge of the samples is on the light side. Before altering the measurement of the intake (on the outside of bonnet) we should like to have your observations as to suction capacity. We may eventually be able to reduce this projection area by 1/2. With compliments, Yours faithfully, pp W.H. COLT LTD. LID {A. J. Lidsey} NATIONAL SCHEME FOR DISABLED MEN | ||
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).