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).
Failure of a redesigned starter switch during endurance testing.
| Identifier | ExFiles\Box 168a\2\ img311 | |
| Date | 4th May 1931 | |
| To RHC.{R. H. Coverley - Production Engineer} S. to HPS.{Horace Percy Smith - Experimental Factory Mgr} Re New-Design of starter switch. We have tested this switch, handed to us by HPS{Horace Percy Smith - Experimental Factory Mgr}, and it failed after only three operations on endurance test due to the contacts welding together. The failure we consider is due either :- (a) Too weak a return spring. (b) Contact blades not flexible enough. We consider the design very promising and have handed it back to T.T. for modification. Rm{William Robotham - Chief Engineer}/Wst. | ||