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).
Chassis centre-point lubrication and frame torsional stiffness.
| Identifier | ExFiles\Box 65a\1\ scan0400 | |
| Date | 29th June 1928 | |
| To OY: from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} +mo Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG29.6.28. CHASSIS - GENERAL. X7770 X.3806 X3614 I have been meaning to write to you to clear up some points. CENTRE POINT LUBRICATION. Sphere. The sphere difficulty was exaggerated. We merely put too much oil in to start with. We now find that we can run with less. We have always used the collector ring shewn in N.sch. 2442. DA.{Bernard Day - Chassis Design} with Burtons assistance has now given us a scheme doing away with the moving coil where the pipe enters the sphere. I believe you have already adopted this. Variation in delivery of drip plugs. If you are conversant with our scheme you will know that all the oil to the pivot, brake shaft, and cross steering tube goes through a single Bijur filter. We found this filter got choked because it had to deal with such a lot of oil -.(it has no restriction in it at all). Thus the supply of oil to the pivot system fell off by degrees. We are remedying this - possibly we shall increase filter area. We think the complete Phantom scheme is now a working proposition. Drip plugs elsewhere O.K. FRAME TORSIONAL STIFFNESS. We have a chassis rigged up so that we can alter the engine mounting from 3 to 4-point in about five minutes. We think the tendency to high speed wobbles is less with 4-point suspension but not very emphatically so. Apart from this we do not think that the steering is altered as much as contd :- | ||