The use of unlapped synchro-mesh cones in Phantom III gearboxes.
| Identifier | ExFiles\Box 94\2\ scan0207 | |
| Date | 16th April 1937 | |
| 328. zRm/Gry. {Shadwell Grylls} c. Da. {Bernard Day - Chassis Design} C. RHC. {R. H. Coverley - Production Engineer} RHC {R. H. Coverley - Production Engineer} /Cy.1/JWA.16.4.37. PHANTOM III SYNCHRO-MESH CONES. The 6 Gear Boxes fitted with unlapped Cones on 3rd and 4th speed have been passed off satisfactorily by Mx. {John H Maddocks - Chief Proving Officer} (Memo' MX. {John H Maddocks - Chief Proving Officer} 3/T.16.4.37.). Will you please advise if this method is to be adopted in future. RHC {R. H. Coverley - Production Engineer} /Cy. | ||
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).