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).
Five modifications for the Ph.II Synchromesh Gearbox.
| Identifier | ExFiles\Box 15\5\ Scan406 | |
| Date | 11th September 1934 | |
| To RHC.{R. H. Coverley - Production Engineer} + 7310 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}14/KW.11.9.34. Ph.II Synchromesh Gearbox. This is to ask you to incorporate in the second gearbox of this kind the following modifications :- (1) Ball bearing, lower 2nd speed slider, H.Sch.4140. (2) Roller bearing for rocker, N.Sch.4145. (3) Steady for 2nd speed sleeve, N.Sch.4143. (4) Wider cores with 45º cams, N.Sch.4141. (Production is starting with narrow cores and 50º cams). (5) Spherical bearing for change speed, and air vent, N.Sch's 4170 and 4173. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||