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).
Requesting an alteration to the Wraith crankshaft drawing based on tests carried out on the Bentley.
Identifier | ExFiles\Box 8\5\ 05-page06 | |
Date | 30th June 1937 | |
To By.{R.W. Bailey - Chief Engineer} c. to E.{Mr Elliott - Chief Engineer} 617 Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/JH.30.6.37. WRAITH CRANKSHAFT. Will you please alter the crankshaft drawing of the above unit to include 2 -.125 dia. holes in each crankpin in place of the existing single hole which is .2187 dia. One of the holes is in the same position as the existing single hole and the extra hole at 180° or opposite to the other standard position. These are shown in the drawing Ex.27855 and are a development of tests carried out on the Bentley to overcome big end bearing siezure. A standardisation sheet has been issued for the Bentley to include this modification and we should like to take advantage of this improvement by incorporating on Wraith III. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||