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).
The performance of governor shock dampers, referencing test reports and comparing different setups.
| Identifier | Morton\M18\ img072 | |
| Date | 14th February 1933 | |
| -2- Hs{Lord Ernest Hives - Chair}/Les.l/KT.14.2.33. strengthened damper casings, which will be capable of dealing with greater loads. Your report dated the 4th inst. says that with the control in a maximum position "When travelling through town at approx. 20 m.p.h., the rear of the car is insufficiently damped". At 20 m.p.h. from your letter of the 10th inst. you get 16 lbs. pressure in the governor system in the maximum position. This is equivalent to approx. 180 lbs. ball pin load, which hardly sounds too soft for good low speed bringing at 20 m.p.h. On the same page you say "with the maximum position travelling through town the car rides very hard". What is the difference between your items 1 and 3. So far from your reports it has been very difficult to understand what your impression is of the governor shock dampers. The rear dampers must have been in the same condition when Slater and Roberts had the car in Paris. There is one thing which is very definite and that is, that we are not interested in these very high loads until we have proved the dampers to be capable of withstanding it. There are no other casings complete here if you burst one of those on 19-EX. We should like to have a report from you comparing 19-EX having governor shock dampers and no Hartfords, with a present production chassis, - i.e., 19-EX when you previously had it in France, having the old type dampers and Hartfords. Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} | ||