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).
Testing and feasibility of using Welsh washers in crankshafts, comparing materials.
| Identifier | ExFiles\Box 132\2\ scan0224 | |
| Date | 8th September 1941 | |
| 1116 To Rm.{William Robotham - Chief Engineer} c. to Inr. c. to Rm{William Robotham - Chief Engineer}/HH. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}10/JH.8.9.41. WELSH WASHERS IN CRANKSHAFTS. During the past five years, we have been trying to carry out a test adapting the above to a Rolls-Royce car engine. It was intended, that this test should be finally carried out on B.60 No.2. This we find cannot be done, because the crank is too hard. It is interesting to note the following outstanding points in connection with this particular cheapening feature, as it now seems certain that no further action can be taken until after the war. (1) HPS.{Horace Percy Smith - Experimental Factory Mgr} considers that we have already proved conclusively by our various adaptations of the Welsh plug, and experiments carried out by W.Bell, that the scheme cannot work. (2) The scheme is standard practice on American car crankshafts. (3) Crankshaft material for most American cars, trucks and tractors :- Carbon .4 - .5 Mang. .6 - .9 Phos. .045 Max. Sulphur .055 max 241 - 269 Br.{T. E. Bellringer - Repair Manager} (4) Crankshaft material for R.R. experimental engines, which we have been calling ".4 carbon", is in reality a standard R.R. specification No.2052 with Brinell 321 - 352. (5) We have a sample of a Lincoln Zephor crank which we have had tested as follows :- POINT BRINELL. Journal. 262 Adjacent to Welsh plug. 248 Welsh plug. 250 Cont'd.{John DeLooze - Company Secretary} | ||