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).
Micro-examination report on cracked top triangle suspension levers from a Wraith II.
| Identifier | ExFiles\Box 95\2\ scan0213 | |
| Date | 14th June 1937 | |
| Rm{William Robotham - Chief Engineer} noted by HS{Lord Ernest Hives - Chair} 346 Micro-Examination Report. M.1347. To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Hl/EJW. HL/EJW.1/AG.14.6.37. Laboratory. c.c. Rm.{William Robotham - Chief Engineer} c.c. E.{Mr Elliott - Chief Engineer} c.c. E/Da.{Bernard Day - Chassis Design} c.c. BY.{R.W. Bailey - Chief Engineer} c.c. RHC.{R. H. Coverley - Production Engineer} RECEIVED 16 JUN 1937 TOP TRIANGLE SUSPENSION LEVERS FROM WRAITH II WHEEL MOVEMENT ON PHAN.III. (Your ref: H.P.S.2/VS.{J. Vickers}10.6.37.) The four specimens taken from cracked sections of the above levers have been examined. In each lever the cracks are due to flaws present in the forging, as indicated by the oxide inclusions and decarb- urisation illustrated in the attached photomicrographs Nos. 1 and 2. In photomicrograph No. 1 it will be seen that besides the open flaw there are two others which are welded shut. In none of the specimens was there any sign of the cracks having developed on test. Rm{William Robotham - Chief Engineer} Hl/EJW. HS.{Lord Ernest Hives - Chair} This answers your queries re the Wraiths wheel movement levers Rm{William Robotham - Chief Engineer} | ||