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).
Schemes for mounting new high-frequency electrical horns on a chassis.
| Identifier | ExFiles\Box 59\3\ Scan175 | |
| Date | 18th June 1932 | |
| X1069 CX.{Major Len W. Cox - Advertising Manager} From Hs{Lord Ernest Hives - Chair}/Wst. c. to PN.{Mr Northey} c. to E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Wst.1/MA.18.6.32. CHASSIS ELECTRICAL HORNS. With regard to the various schemes of mounting the new type high frequency electrical horns on chassis, we consider we ought always to have Sales agreement as to the position of these horns on the chassis from the appearance point of view, before standardizing any scheme. We have another scheme in mind of mounting the horns on the chassis underneath the front apron, one each side of the number plate. These horns would be arranged slightly detuned relatively and would be sounded together. The effect would be a very piercing "heterodyne" effect caused by the frequency of both horns beating together giving a note of slightly lower frequency but double the power. This scheme of horns for high speed cars was tried on the Bentley cars some time ago, particularly the cars which was used on the Le Mans 24 hours race and were very effective in clearing the way at high speed. Mr. Hancock is trying a similar scheme of horns but with the horns fitted to each head lamp pillar, the horns being wired up in parallel to the same horn push switch. Before we proceed experimentally with the scheme proposed of mounting the two horns under the apron we should like to have Sales opinions and their approval. Hs{Lord Ernest Hives - Chair}/Wst. | ||