The design of gearbox and back axle flanges for the Wraith II propeller shaft.
| Identifier | ExFiles\Box 9\2\ 02-page08 | |
| Date | 11th February 1937 | |
| SECRET. 637. 104 BY. {R.W. Bailey - Chief Engineer} C.H.Ba. Rm. {William Robotham - Chief Engineer} HPS. {Horace Percy Smith - Experimental Factory Mgr} E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} 2/HP.11.2.37. Wraith II Propeller Shaft. We send herewith N.Sch.5027 showing the flanges on the gearbox, and back axle to suit the propeller shaft to be supplied by Messrs. Hardy Spicer, and shewn by N.Sch. 5024. The gearbox flange (the balance of which is important) is machined circular, but the axle flange is approximately rectangular to save weight, and is left as forged around the circumference. Both flanges should be tried in mild steel. N.Sch.5027 herewith. E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} | ||
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).