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).
Testing procedures for lubricated road springs on the 20-EX model.
| Identifier | ExFiles\Box 16\7\ Scan147 | |
| Date | 30th January 1929 | |
| To RHC.{R. H. Coverley - Production Engineer} From HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X7410 HS{Lord Ernest Hives - Chair}/RmL/LG30.1.29. LUBRICATED ROAD SPRING FOR 20-EX. We think that the most effective way of testing the modified schemes of spring lubrication is to confine the modification to one half of each spring, leaving the other half standard. We would like you to do this on the rear springs only, doing the front half of one spring and the rear half of the other to scheme 3. We should like you to use scheme 3. of DA{Bernard Day - Chassis Design}'s complete as R.{Sir Henry Royce} has now sent an enthusiastic approval of it. We think the front springs should be treated in entirety as the main interest in doing these is to prove the life. We think that all the remaining SS.{S. Smith} springs should have the single hole drilled through the eye centre and that all cars should be fitted with the spring 'pot' which allows the gaiter to enter. On dismantling the springs off 13-EX in France they found that the tip of each leaf for .5" from the end were rusty, therefore our oil grooves must run out almost to the tip of the leaf. HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||