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).
Modifications to knurled shafts for the B.V. front shock damper to resolve assembly issues.
| Identifier | ExFiles\Box 99\3\ scan0141 | |
| Date | 2nd May 1939 | |
| 442 To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. RHC.{R. H. Coverley - Production Engineer} c. HPS.{Horace Percy Smith - Experimental Factory Mgr} c. RHC{R. H. Coverley - Production Engineer}/Wld. c. By/NS.{Norman Scott} c. Roy{Sir Henry Royce}/Les.{Ivan A. Leslie} c. HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}12/WH.2.5.39. KNURLED SHAFTS - B.V. FRONT SHOCK DAMPER. There has been considerable opposition to this construction owing to assembly difficulties. Therefore we have altered the interference fits from .043" to .024" with the result that assembly now presents no difficulty and we have satisfied ourselves that the strength is adequate by applying a 500% overload. We want to see this construction on production and will add the hand brake lever to the list of parts thus assembled at an early date. Further details are as follows:- Shaft FB.4726 - no change required. Rocking lever FB.4725 - centre hole to be opened from 1.081 dia. to 1.100 dia. End lever FB.4334 - (or equivalent) centre hole to be opened from 1.081 dia. to 1.093 dia. The normal maximum load (for France) on the lever end is 140 lbs. and we applied 800 lbs. without sign of failure of the knurling. We are inclined to think the construction is unnecessarily strong. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||