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).
B.50 gearbox issue where 2nd speed gears disengage, proposing an experimental fix based on blueprints.
| Identifier | ExFiles\Box 112\2\ scan0080 | |
| Date | 13th January 1939 | |
| 828 also 1069 γ To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}2/MH.{M. Huckerby}13.1.39. B.50 GEARBOX. Humbers have told us their latest wangle to keep gears in mesh. As we get occasional 2nd. speeds coming out on the drive it is possible that distortion in hardening is the cause. We send you herewith two marked up blue prints. They show bellmoulding positive and negative of the 2nd. speed driven gear and a mating piece driving and over-running on all teeth. Will you please give these Ex numbers and have the 3 necessary pieces made. The bushes for this experiment should have .004 clearance inside and outside and .008 end float. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||