Noise testing of Phantom III cars over granite sets.
| Identifier | ExFiles\Box 157\1\ scan0308 | |
| Date | 17th April 1936 | |
| X1332 Sw. and Wor. {Arthur Wormald - General Works Manager} from E. {Mr Elliott - Chief Engineer} c.c. HS. {Lord Ernest Hives - Chair} By. {R.W. Bailey - Chief Engineer} Ex. JLE. {J. Lee Evans - Chassis Test Manager} Ba. LA. {L. A. Archer} EV. {Ivan Evernden - coachwork} (text is struck through) E.4/HP.17.4.36. Phantom III Noise on Sets. Yesterday we tried the following Phantom III cars for general noise and booms over granite sets. 32-EX - Continental touring saloon - grey - No rubber under axle. 33-EX - " " " - red - Rubber under axle. 34-EX - Park Ward limousine, fitted with divided wooden floor in rear. - No rubber under axle. 36-EX - Hooper limousine fitted with metal floor in rear. - Rubber under axle. Giving my own impressions which were, however, in agreement with the others present, I think that 32-EX came out as a very good production standard, which would undoubtedly be passed as quite satisfactory. 33-EX was very good indeed, and better than 32-EX, with a more level noise curve throughout the range tested. The effect of the rubber under the axle appears to be to level off the peaks. In both of these cars, as in any other motor car we yet know, the granite sets set up a kind of subdued roar which becomes more audible at certain speeds, more particularly round about 30 miles per hour, and this speed appears to hold good for any type of body and any type of car. The Park Ward saloon on 33-EX is not so good as 32-EX 10,000 mile chassis, but we think it is no worse than similar motor cars that we are selling today, as on the 25-HP. and which are accepted as satisfactory. Sales have also accepted this car once as satisfactory. By comparison with the Park Ward limousine the Hooper is definitely worse, in spite of having rubber under the rear axle. This may be accounted for by three reasons, all of which may be contributary. Firstly, we believe it is our experience that Hooper bodies are always more resonant than the Park Wards. Secondly, 36-EX body has not done anywhere near the same mileage as 34-EX, and finally the Hooper limousine has a one piece metal floor which appears | ||
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).