The investigation and testing of different tappet arrangements for the Phantom engine.
| Identifier | ExFiles\Box 158\5\ scan0087 | |
| Date | 25th April 1934 | |
| Hs {Lord Ernest Hives - Chair} /Swdl. {Len H. Swindell} 2/KW.25.4.34. - 3 - generally is being investigated, the question of suitable springs for these particular tappets on the Phantom is not important. Attached is a print, EX.12871, which other than showing the arrangements Hs. {Lord Ernest Hives - Chair} 1206 and Hs. {Lord Ernest Hives - Chair} 1210 includes the scheme Hs. {Lord Ernest Hives - Chair} 1209, the mechanism of which is a copy of the original Halford tappet, as designed for the aero engine. This scheme did not function reliably at low oil pressures and trouble ensued with air trapping in the oil compression space, so that this arrangement was not persevered with to any extent, At present the self adjusting set of tappets Hs. {Lord Ernest Hives - Chair} 1210 in the chassis are being run continuously to see if wear takes place and its effect, also an arrangement is being devised to prevent oil draining back from the rocker shafts and oil pipes etc.. Further tests include the comparison between radial ended plungers giving line contact (at present used) and free to rotate plungers with spherical ends giving point contact. Hs {Lord Ernest Hives - Chair} /L.H. Swindall. | ||
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).