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 results of an examination of Phantom III steering rocker shafts for twisted splines.
| Identifier | ExFiles\Box 95\1\ scan0527 | |
| Date | 15th May 1939 | |
| 350 F.J.H. To: By c. to Rm.{William Robotham - Chief Engineer} By/SB.{Mr Bull/Mr Bannister}1/MG.15.5.39 PHANTOM III. STEERING ROCKER SHAFTS ----------------------------- As requested, Depots have now examined a number of Phantom III cars for signs of twisted splines, with the following results. Total examined Splines found twisted Paris 2 Nil Derby 5 Nil N. 24 1 --- --- 31 1 [Handwritten checkmark and initials 'F.J.H.' over the table] This represents only 3%. The one car which had the splines twisted also suffered from breakdown of the hardening of the inner races, and it is conceivable that much of our trouble with the Ph.III rollers has been due initially to impact loading which is transmitted more positively from the front wheels owing to lack of flexibility. By/SBB | ||