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).
Technical memorandum regarding the car position of the Phantom III, covering the carburetter, engine/tyre noise, and gearbox.
| Identifier | ExFiles\Box 91\1\ scan0212 | |
| Date | 22th January 1936 | |
| Sg.{Arthur F. Sidgreaves - MD} and Wor.{Arthur Wormald - General Works Manager}from E.{Mr Elliott - Chief Engineer} X300 c. Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} Hives E.1/HP.22.1.36. re Car Position - Phantom III (1) Carburetter. We are much better pleased with the general accessibility provided by the use of the Stromberg carburetter, and we believe that the raised up position of the floatchamber will be better for freedom from vapour lock. We have provided a scheme for the air silencer and the problem will be to avoid getting this so big that it interferes with the accessibility of the distribution board. Some development work will undoubtedly be necessary, but a 12 cylinder should not be so difficult to silence on the intake. It was found that the original design of air silencer we made for the 4 carburetter job could not be improved upon, but we cannot expect this result always. We should like to know what is the position of the air silencer Stromberg development for the Stromberg carburetter at the moment. (2) Engine Noise and Fuss. With regard to the question of insulating the back of the dash, we do not know if all the noise complained of is due to the use of the designed noise insulation scheme. If it is not possible to make this latter a chassis job it may appear that we shall have to arrange with the coachbuilder to make a sort of eider-down that buttons inside of the scuttle and dash after the coachwork is in position. (3) Tyre Noise. We are anxious to get a figure of merit for the rubber body mounting alone with and without lateral stays connected up to the body at the rear. We have issued designs for rubber shackles on the rear springs, and this modification has allowed us to greatly simplify the scheme of road spring lubrication. (4) Gearbox. | ||