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).
Requesting a new design for a more flexible gearbox suspension to increase silence, referencing the Terraplane engine mounting.
| Identifier | ExFiles\Box 94\1\ scan0091 | |
| Date | 11th February 1935 | |
| +326 To E.{Mr Elliott - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} c. to Hdy.{William Hardy} c. to By.{R.W. Bailey - Chief Engineer} Ha/Gry{Shadwell Grylls}15/KW.11.2.35. Gearbox Suspension. It has recently been discovered that the rubber engine mounting on the 20/25 has greatly increased the silence of the gearbox. As the SpectreCodename for Phantom III box is now not sufficiently quiet, being about as good as the pre-rubber mounted 20/25 but not nearly as good as a Phantom, we should like to be able to fit a more flexible suspension. The front rubbers to G.56268/9 are 5-ply canvas and rubber, and we do not see in view of their small thickness how to make them more flexible. Will Hdy{William Hardy} please issue a design more on the lines of the Terraplane engine mounting, together with a suitable stay for location purposes. Ha/Gry.{Shadwell Grylls} | ||