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).
Request for a set of modified Phantom II Halford type self-adjusting tappets with specific modifications.
| Identifier | ExFiles\Box 17\6\ Scan229 | |
| Date | 29th May 1934 | |
| +7060 RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/Std. Hs{Lord Ernest Hives - Chair}/Std.4/MA.29.5.34. Will you please have a set of ball valve housings made for P.II Halford type self adjusting tappets to Ex.12872 (complete with ball and cage as shown on Ex.12871), with the following modifications. (1) No slot for outer casing locating pin as this pin is no longer used. (2) External diameter to be .4997 plus ½ (3) Ball valves to have spherical seatings of same radius as ball - to give .005 ball valve movement. Hs{Lord Ernest Hives - Chair}/Std. | ||