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).
Mounting schemes and tests for a new Lucas electric horn.
| Identifier | ExFiles\Box 59\3\ Scan166 | |
| Date | 2nd May 1932 | |
| X6032 Ry. from Hs{Lord Ernest Hives - Chair}/Wst. c. CX.{Major Len W. Cox - Advertising Manager} c. RM.{William Robotham - Chief Engineer} HS{Lord Ernest Hives - Chair}/Wst.3/AD2.5.32. X6075 CHASSIS ELECTRIC HORNS. With reference to Cxl2/KW26.4.32, the position is that we are unable to issue a standardisation sheet for this new Lucas HF.{H. W. Frost - Coachwork Inspector}722 horn in place of the present standard Klaxon until we have a satisfactory mounting for the same. Two schemes of mounting the horn underneath the apron are being tried out, the most satisfactory one being on 19-EX now in France. This scheme can also be equally well adapted for the 20/25. The mounting of the horn is the all important factor from the point of view of acoustic efficiency and we cannot recommend this horn for production until a satisfactory scheme has been tried out. Upon the satisfactory completion of the 10,000 mile test on 19-EX now in progress we shall be able to definitely recommend for production this high frequency Lucas horn complete with its mounting. Our tests on 18-GIV have been with the horn mounted on the front cross member which Sales have condemned from the point of view of appearance. The scheme on Sg{Arthur F. Sidgreaves - MD}'s car 58-CN{Mr Chamberain} where the horn was suspended downwards from the front cross member, was unsatisfactory, the horn being too near the number plate. HS{Lord Ernest Hives - Chair}/Wst. | ||