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).
Lighter valve gear mechanism on the new main engine head and its expected performance.
| Identifier | ExFiles\Box 134\2\ scan0155 | |
| Date | 12th October 1937 | |
| To Rm{William Robotham - Chief Engineer} File. N29a. 12.10.37 High Power Valve Gear Inertia The valve gear mechanism as fitted to No 5 head. i.e. the new main engine head, is lighter than the old valve gear, due to shortened rocker. With the newer lightened valve gear as enumerated on Dal/Sm 2/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 12.10.37. we hope to obtain fairly good results as regards bounce, bottom tappet wear, valve spring stresses &c. RHf Ed{J. L. Edwards} | ||