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).
Technical memorandum on the stresses and loading of a winch reduction gear.
| Identifier | ExFiles\Box 175\2\ img148 | |
| Date | 31th July 1941 | |
| 2006 To EV{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions} c. to Rm.{William Robotham - Chief Engineer} Ev{Ivan Evernden - coachwork}/Tln.10/JH.31.7.41. Winch Reduction Gear. The most highly stressed gear of those quoted on PL.776 is the 25 tooth pinion. This has a surface loading of 3,550 lb/in.in. and a Lewis root stress of 3,700 lb/sq.in., based on .12 input H.P. at 4000 r.p.m. Those stresses are low by automobile standards, and the toughened unground gears suggested should prove satisfactory for the intermittent duty required. Ev{Ivan Evernden - coachwork}/Tln. | ||