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).
Test drive, noting vibration, rattles, and the performance of dampers, oil retainers, and brakes.
| Identifier | ExFiles\Box 6\6\ 06-page422 | |
| Date | 17th January 1938 | |
| 600 Rm{William Robotham - Chief Engineer}/Sym. Rm{William Robotham - Chief Engineer}3/R.17.1.38. 24.G.VI. I did not have an opportunity of taking this car any distance, but I formed the impression that the rubbers instead of the torque reaction damper were slightly better than on the over-run, but produce a little more vibration when picking up full torque @ 10 m.p.h. There is a rattle somewhere on the nearside of the dashboard at about 12 m.p.h. on a full torque. The oil retainer squeaked in the rear axle. The car definitely rides better when cold than when the dampers get warmed up. Les.{Ivan A. Leslie} should give us a figure of merit for the dampers hot and cold, and we ought to be sure that they are not susceptible to oil viscosity by the time they go on to production. The brakes did not squeak after the first one or two applications. Rm.{William Robotham - Chief Engineer} | ||