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).
Experimental springs for chassis N.122 KR, detailing specifications and performance concerns like high-speed wobbles.
| Identifier | ExFiles\Box 47\2\ Scan120 | |
| Date | 5th May 1929 | |
| To BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} Sft.{Mr Swift} c. to CX.{Major Len W. Cox - Advertising Manager} Handwritten: Y4117 CHASSIS N. 122 KR. MR. HAYWOOD. Handwritten: Y4117 (crossed out) Handwritten: X8450 With reference to the experimental springs fitted to the trial chassis on which the test was made to induce Mr. Haywood to place an order. These springs consisted of: Free length.............. 3.200 Wire dia................. .250 Mean coil dia............ .725 Outside coil dia......... .985 6.25 working coils and a coil ground square at each end making 8.25 coils in all. In order to keep the max. stress of these springs down to safe limits it is necessary to fit pieces F.75797 altered as per attached drg. We think that it would be advisable to try and get the customer to accept the car with standard S.S. tube springs, because we know that these special high rating springs will have certain disadvantages with regard to high speed wobbles and steering shocks. Therefore we think that they should only be fitted as a last resort. We hand you herewith the four springs that were fitted on the demonstration run. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} | ||