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).
Alternative designs for the Phantom III and Wraith horn button.
| Identifier | ExFiles\Box 166\9\ img112 | |
| Date | 19th June 1937 | |
| 6066 LSC- E.2/HP.19.6.37. Phantom III and Wraith Horn Button. Replying to your memo Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}6/AP.4.6.37, I think this scheme Rm.{William Robotham - Chief Engineer}389 offers an alternative method of operation but that the square section rubber rings stretched over the four internal lips of the button would in time perish and fall away. I am having an alternative scheme made with moulded rubber and possibly using one instead of four locating screws. E.{Mr Elliott - Chief Engineer} | ||