On the satisfactory test results of Phantom III synchro-mesh cones.
| Identifier | ExFiles\Box 94\2\ scan0206 | |
| Date | 16th April 1937 | |
| 32S To Rm {William Robotham - Chief Engineer} /Gry {Shadwell Grylls} from Mx. {John H Maddocks - Chief Proving Officer} Mx {John H Maddocks - Chief Proving Officer} 3/T16.4.37 PHANTOM III SYNCHRO-MESH CONES Reference RHC {R. H. Coverley - Production Engineer} /Cy3/IS31.3.37 The six gear boxes referred to in the above memo have proved very satisfactory on test. In four cases the synchro-mesh worked perfectly, and the remaining two were satisfactory after a small amount of use. In our opinion they are much more satisfactory than the lapped cone. | ||
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).