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).
Requirements and alternatives for electric horns for model J.3, noting the ineffectiveness of some existing options.
| Identifier | ExFiles\Box 178\3\ img022 | |
| Date | 17th January 1932 | |
| SG.{Arthur F. Sidgreaves - MD} FROM DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} DA{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork}2/M17.1.32. Copy to L. HS.{Lord Ernest Hives - Chair} J.{Mr Johnson W.M.} 3. X6032 The writer proposes visiting Sales on Friday and would like to receive the latest views of the Sales Dept. on the subject of electric horns for J.{Mr Johnson W.M.} 3. As far as he is aware, while the klaxon and bulb horns are not wholly successful, and rather expensive, no one has produced a cheaper substitute which fulfils our requirements. We understand that Derby fitted a pancake vibrator horn on the headlamp bracket of cars going to France, as this is the only means whereby they can make themselves heard. The Bosch horn is considered ineffective. DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} | ||