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 Hall's rev counter for accuracy when mounted in an aluminium panel before running at Shelsley Hall.
| Identifier | ExFiles\Box 90a\2\ Scan221 | |
| Date | 21th September 1934 | |
| To RHC.{R. H. Coverley - Production Engineer} x 7962 HS{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}26/KW.21.9.34. Hall's Rev. Counter. We expect that at Shelsley Hall will want to run up to 7,400 revs. In order to ensure that he will not smash his crankshaft we want to run his rev. counter on the test bed on his engine in an aluminium panel similar to the material of which his instrument board is made, to check its accuracy. These rev. counters read differently when fitted in aluminium to when fitted in wood. Will you please let Salt have this rev. counter either with the instrument panel, or if more convenient, in an aluminium holder. HS{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||