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).
Questioning the design of push rods with hydraulic tappets on a Phantom III following a failure.
| Identifier | ExFiles\Box 131\2\ scan0116 | |
| Date | 30th March 1938 | |
| [Handwritten]: SWDS What do we say. Rm{William Robotham - Chief Engineer} 1113. To By.. from GWH.{George W. Hancock - Head Chateauroux} c. to Rm.{William Robotham - Chief Engineer} Re: Phan.III - Push Rods with hydraulic tappets. Is the design such that when a valve sticks open the push rod can come out of the spherical seating of the rocker arm adjusting screw. A case of this has happened and damaged the rod beyond repair. Is it because the limits allowed happen to be all on the wrong side? If not has the setting of the tappet clearance been too great. GWH.{George W. Hancock - Head Chateauroux} | ||