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).
The unsatisfactory testing of high-frequency electric horns mounted under the apron, recommending against this method.
| Identifier | ExFiles\Box 59\3\ Scan214 | |
| Date | 24th October 1932 | |
| X6032 By.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Wst. c. Cx.{Major Len W. Cox - Advertising Manager} c. Da{Bernard Day - Chassis Design}/E.V. c. E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Wst.3/AD24.10.32. HIGH FREQUENCY ELECTRIC HORNS MOUNTED UNDER THE APRON TO D.SCH. 584. We have now had an opportunity of testing this arrangement of duel high frequency horns on 40/50 chassis 19-EX. The result was extremely unsatisfactory, the sounding of the horns causing considerable vibration and giving a very raucous low pitched note. The same type of horn mounted under the head lamp pillars gives an entirely different effect, the sound being very pronounced as on chassis 19-CIV. We do not recommend, therefore, the adoption of this method of mounting these horns. Hs{Lord Ernest Hives - Chair}/Wst. | ||