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).
Rig tests on steering ball joints and a request for new parts made of casehardened and soft steel.
| Identifier | ExFiles\Box 95\1\ scan0416 | |
| Date | 26th June 1937 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. W.Bell. 35-0 Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}3/AP.26.6.37 Ph.III. Steering Ball Joint Rig Tests. Our rig tests on cross steering ball joints have so far shown that the BZ/PD. pads are slightly better than standard BZ/PC. for maintaining their friction load but would not eliminate the necessity for periodical resetting in service. The brass pads were unsatisfactory owing to a high stiction load and tendency to pick up. We now wish to try pads in casehardened and soft steel. Will you please make the following:-- 8 off G.83415 in S/ZN. casehardened 0.015 deep. 8 off G.84934 " " 8 off G.83415 in S/N. 8 off G.84934 " " Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||