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).
Modifying the Phantom III front suspension main lever and fulcrum pin to prevent fractures.
| Identifier | ExFiles\Box 95\3\ scan0197 | |
| Date | 20th December 1936 | |
| C. Hs.{Lord Ernest Hives - Chair} RHC.{R. H. Coverley - Production Engineer} WB.{Mr Brazier/Mr Bell} Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} E.1/HP.20.12.36. Phantom 3 - Modified Main Lever and Fulcrum Pin - front suspension. With regard to the failure of the front suspension lever both on the road and on the bump test, we believe we can considerably strengthen this part at the point of fracture by leaving out all except two keyways, as shown on the attached drawing N.Sch.4716. This involves no alteration to the forging, but we are utilising the machining allowance on the forging to leave a little more metal on the boss of the finished lever where specified. We are very anxious to get a model of this N.Sch.4716 on the bump test, and we have, therefore, added sufficient dimensions to the drawing to enable one to be produced forthwith. This will give us a quick check up against the standard lever. The 35 thou. radius has been specified in the corners of the keyways in the lever boss as the fractures in all cases have so very definitely started from the sharp corner we have previously had at this point. E.{Mr Elliott - Chief Engineer} | ||