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).
Instructions for modifications to cross steering tubes to address low speed wobble issues.
| Identifier | ExFiles\Box 91\2\ scan0014 | |
| Date | 15th May 1937 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} 300a Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}1/AP.15.5.37 32-EX. CROSS STEERING TUBES. We have found that the friction of the cross steering tube joints falls appreciably as the spherical surfaces of the bronze pads become polished with use. This results in low speed wobbles. We wish to try on 32-EX. some ball pads of softer material in the hope that they will become run in more rapidly. Will you please make the following pads:- 8 off G.83415 in BZ/PD. Spec.214.B. 8 off " in B. Spec.2151. 8 off G.84934 in BZ/PD. Spec.214.B. 8 off " in B. Spec.2151. In addition to the adjustable tubes which we have already instructed for 32.EX., will you please fit the following - 1. Offside tube to have all ball pads in drawn phosphor bronze (BZ/PD.) 2. Nearside tube to have all ball pads in brass (B) 3. Lower ball pads to be pressed into housings as is done on Production, care being taken that they are as tight as production pads. 4. New production ball pins to be fitted. 5. Ball pads not to be lapped in but to be skimmed up by hand after pressing in by spherical ended rose cutter. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||