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).
The solution to reverse gear issues in the 25 HP synchromesh gearbox by increasing shaft stiffness.
| Identifier | ExFiles\Box 181\M13\M13.2\ img128 | |
| Date | 11th November 1931 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. to Sg.{Arthur F. Sidgreaves - MD} Wox. c. to E.{Mr Elliott - Chief Engineer} Ba. c. to By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}7/MJ.11.11.31. Y 5310. 25 HP. SYNCHROMESH GEARBOX. REVERSE GEAR. We have overcome the trouble of reverse gear working out under full load by fitting a shaft of twice the stiffness. Before doing this we tried a solid standard shaft (i.e. omitting the .750 dia. boring), but this 20% increase in stiffness was insufficient. For this test we used Whitemetal bushes with horizontal oil grooves opposite to the load. These bushes stood up to fifteen minutes full torque. Hs{Lord Ernest Hives - Chair}/H.Grylls. Attached: Hs.{Lord Ernest Hives - Chair}450. | ||