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).
Discussions with Messrs. Lucas about their new Wind Tone horns for the Spectre chassis.
| Identifier | ExFiles\Box 59\3\ Scan332 | |
| Date | 13th June 1935 | |
| E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to Sg.{Arthur F. Sidgreaves - MD} c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} c. to Cx.{Major Len W. Cox - Advertising Manager} c. to Roy.{Sir Henry Royce} 6066 Ha/Wst.1/MA.13.6.35. LUCAS WIND TONE HORNS FOR SPECTRECodename for Phantom III CHASSIS. We visited Messrs.Lucas this morning regarding their new Wind Tone horns when we discussed with their technical experts the following points :- (a) Whether our horn switch and cables would carry the horn current satisfactorily without their relay switch. (b) The relative advantages of either sounding one horn only for town use or both horns softened in tone. (c) Whether it would be possible to reduce the trumpet length of the horn. Regarding (a) they stated that our switch and cables were quite satisfactory without the use of a relay but they would prefer us to use the relay in order to take advantage of their scheme of softening the tone for town use. This scheme we decided, after a demonstration in their laboratory, was definitely preferable to our original idea of using one horn only for town use. With reference to (c) they cannot entertain any idea at the moment of reducing the length of the trumpet as this length and the angle of the flare is the determining factor governing the whole distinctive tone of the horn. They have spent a considerable time obtaining the correct dimensions and any alteration would be fatal at this stage. The position of the support bracket however is immaterial to the performance of the horn. | ||