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).
Order for four Wraith crankshafts with material and crankpin design alterations.
| Identifier | ExFiles\Box 8\5\ 05-page04 | |
| Date | 25th May 1937 | |
| HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 617 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}9/AP.25.5.37 WRAITH CRANKSHAFT Will you please order 4.Wraith crankshafts to be made in Hykro. Other than the material alteration the crankpins to have 2 - .125 dia. and not the 1 - .2187 hole as in the present shafts. One of the .125 dia holes is drilled in the same position as existing drawing shows and the other opposite. In conjunction with the above big end bearings(A.C.6.)to be put in hand with single hole in the rod half bearing. Rm{William Robotham - Chief Engineer}/swdl.{Len H. Swindell} | ||