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).
Standardisation document regarding the deletion of the cam balancer face on the crankcase for the 25/30 HP Wraith.
| Identifier | ExFiles\Box 171\5\ img075 | |
| Date | 31th August 1938 | |
| RR 755A (10H) (45958) 19/10/37 C.B.Co. COMPLETED DATE 27.4.39. 25/30 H.P. Wraith STANDARDISATION OF PARTS Description: DELETION OF CAM BALANCER FACE ON CRANKCASE. Date Issued: 31.8.38 Sheet No.: W.1. Drg. No.: L.O.P.S. Purpose: Originally left on crankcase as a precautionary measure in case it would be necessary to refit balancer. Brief Report and Remarks: By investigation results and the fact that running has been continued on the road without cam balancers yet without any gear rattle due to the absence of the balancer, the racing of the crankcase to suit the fitment of a balancer can be deleted. When recommended for Introduction: Report References: By Rm{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design} Mx{John H Maddocks - Chief Proving Officer} BY.{R.W. Bailey - Chief Engineer} RM.{William Robotham - Chief Engineer} DA.{Bernard Day - Chassis Design} MX{John H Maddocks - Chief Proving Officer} Old Parts New Parts Increase in Cost £: NEGLIGIBLE Decrease in Cost £: G/Rt. 27/2/39 Cost of Tools £: NIL. Production Position and Comments: This modification was introduced at approximately the 1st. Chassis in 'B' series without affecting production. No scrap or tool cost was involved and the difference in Factory cost was negligible. RHC.{R. H. Coverley - Production Engineer} Authorisation to Proceed. Introduce on the 1st Chassis in B Series. Sg.{Arthur F. Sidgreaves - MD} Signature, Date: 24/4/39 Hs.{Lord Ernest Hives - Chair} Signature, Date: 26/4/39 | ||