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 strengthen the Bentley front axle pivot.
| Identifier | ExFiles\Box 82\3\ scan0301 | |
| Date | 16th May 1935 | |
| To EY. Copy to WORSLEY. HS.{Lord Ernest Hives - Chair} HIVES. H.S. Handwritten notes: Wood, Rm{William Robotham - Chief Engineer} BENTLEY FRONT AXLE PIVOT. Herewith is N.Sch.4495, showing the standard and 4º pivots strengthened by increasing the radius of the fillet immediately inside the inner roller race, where the fracture took place, and also by reducing the diameter of the bore of the stub axle. Moving the fillet inwards in order to increase it would increase the theoretical stress, so it is necessary to reduce the bore as shown, when a reduction of the theoretical stress due to vertical load of approximately 8% is obtained. Making the pivot solid would reduce this stress 20%. There is however a reduction in the stress due to side or torsional load of 25%, with the bore as shown, but the greatest gain, no doubt is the increased radius. Da.{Bernard Day - Chassis Design} Att: N.Sch.4495. | ||