15,000-mile comparative test of different valve types in a B-19 unit.
| Identifier | ExFiles\Box 83\1\ scan0051 | |
| Date | 5th November 1935 | |
| To RHC. {R. H. Coverley - Production Engineer} X 20D4 Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 28/KW.5.11.35. B-19 Unit - 15,000 miles test in B-6 Car. We should like to try 2 of the stellited S.80 valves asked for in Hs {Lord Ernest Hives - Chair} /Smth.11/KW.29.10.35. on the next 15,000 miles test on B-19 unit. The big advantage of this scheme is that having a low coefficient of expansion it enables us to run with a small tappet clearance and so keep our valve gear quiet. For purposes of comparison we should like to run in parallel with these 2 valves, 2 silchrome stellited valves and 2. KE-965 stellited valves. We did not specify any particular material in the original specification Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} 1/KW.31.8.35., so presume that these are at present standard. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).