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).
Modifications to B.60 exhaust valves to prevent sodium leakage.
| Identifier | ExFiles\Box 123\5\ scan0182 | |
| Date | 24th November 1938 | |
| 1044 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Da{Bernard Day - Chassis Design}/Jnr.{Charles L. Jenner} c. By/CS. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}19/MH.{M. Huckerby}24.11.38. B.60 EXHAUST VALVES. The sodium filled exhaust valves fitted onto the above unit reveal that in several valves the sodium is leaking out. There are several things in the first set of valves that might have caused the trouble and would like all future exhaust valves you are making to include the following modifications, and where necessary, the detail drawings altered to suit. (1) The plug E.86290 should be in KE.965 and not S/M in order that the expansion rate be the same as the KE.965 exhaust valve. (2) The present dimensions of the plug in the hole allows in the limit this plug to be .0005 slack in the valve with a nominal interference of .0005. This should be modified to give a nominal of .001 interference and in the limit size and size. (3) Although it states on the valve drawing EB.4378, that the plug after pressing in should be Stellite welded, we verbally agreed that the first six 'rush' valves could have normal welding. In future valves, however, all the plugs should be stellite welded as per the drawing. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||