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).
New aluminium rear jack bracket design for the Wraith II, superseding a previous forged steel version.
| Identifier | ExFiles\Box 139\1\ scan0344 | |
| Date | 19th January 1937 | |
| SECRET. GRYLLS 1166 BY.{R.W. Bailey - Chief Engineer} c. E.{Mr Elliott - Chief Engineer} Ds. Rm.{William Robotham - Chief Engineer} HPS.{Horace Percy Smith - Experimental Factory Mgr} E/HDY.{William Hardy}1/HP.19.1.37. Wraith II. - Rear Jack Brackets. We send herewith N.Sch.4995 showing aluminium jack brackets for use with the axle tubes of the new type with a long taper. This scheme cancels N.Sch.4944 showing a forged steel bracket for the same axle tube. The key which prevents rotation of the bracket around the tube also serves for endwise location by being recessed into the bracket. Split pins are used for the nuts as it is thought that there is a greater chance of the bolts becoming loose on the taper tube than on a parallel tube as on the Phantom III where lock nuts are used. The peg locating the jack is shown parallel and is driven in. The Phantom III should be altered to agree in due course. E/HDY.{William Hardy} N.Sch.4995 herewith. | ||