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).
New design for Phantom III valve rockers, noting a known fault with excessive oil flow.
| Identifier | ExFiles\Box 96\2\ scan0218 | |
| Date | 16th April 1937 | |
| He. from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} RHO. E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} By.{R.W. Bailey - Chief Engineer} Mx.{John H Maddocks - Chief Proving Officer} _______ 354 Rm{William Robotham - Chief Engineer}/OWHB/R.16.4.37. NEW TYPE P.III VALVE ROCKERS. The scheme for new rockers with deleted hydraulic tappers Lec.5441 has been designed with the fault already known allowing too much oil to flow on to the valve stem. Although in this scheme there is no direct supply of oil to the rocker pad. It is exactly the same scheme as was tried out with the present rockers to reduce oil flow and failed. A scheme similar to the present one of fitting felt washers should be incorporated. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||