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).
Road test results regarding shock absorbers, springing, steering, and braking systems.
| Identifier | ExFiles\Box 69\2\ scan0121 | |
| Date | 22th July 1924 guessed | |
| To CJ. from BJ. Copies to R.{Sir Henry Royce} & Hs.{Lord Ernest Hives - Chair} -2- solid bumps considerably, so that more than 12% increase was distinctly inadvisable. It was thought that possibly the unsprung weight hitting the opposite side of a pot-hole or an unevenness in the road caused an increased jar, which could be felt throughout the chassis, both in the back seats as well as in the front seats. 98-NK rolled and pitched more than 107-MG, but this was corrected by tightening the back shock-absorbers considerably. Unfortunately, however, this increased the road vibrations and therefore it will be necessary to have the shock-absorbers on all these cars very carefully adjusted. It would be interesting to learn exactly what will be the difference in the steering radius of E.A.C.III with short and long wheel base, as compared with our standard 40/50 h.p. short and long wheel base. P.N. and I both obtained the impression that there was a considerable difference between the steering radius of 107-MG and 98-NK. Will Hs.{Lord Ernest Hives - Chair} please let us know? Before coming to a final decision, therefore, as to what springing and brakes were O.K., it was considered (a) that a test of the final 12% stronger springs of E.A.C.III design and front brakes should be made by London; (b) that a 10,000 mile test should be made with similar springs, front brakes and touring body. Hs.{Lord Ernest Hives - Chair} will endeavour to arrange for London to try, during the next few days, a car without radius rods, fitted with the actual type of springs which will be supplied with E.A.C.III, as it is important that if possible we should be able to instruct the spring makers to alter all the springs during the Works holidays. Also if the 10,000 mile test is continued in France during the holidays, this may enable the Works to start altering the cars already delivered, and producing new chassis with front wheel brakes directly after the holidays. The above information only concerns open touring cars. It is of course impossible for London to come to | ||