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).
Alterations to stiffened tappet covers to improve their seal.
| Identifier | ExFiles\Box 124\1\ scan0045 | |
| Date | 17th March 1939 | |
| [Handwritten top centre] Piles 1044 [Handwritten top right] Slide BY/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} [Text is struck through] c. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} [Text is struck through] DA.{Bernard Day - Chassis Design}4/G.17.3.39. B.60 - STIFFENED TAPPET COVERS. Please receive herewith :- E.CD.1243 Stiffened Tappet Covers. B.60. Owing to the difficulty in making an oil tight joint with the original pressed steel tappet doors, we have made the following alterations to the pressings with a view to stiffening them sufficiently to enable a joint to be made :- (1). The depth of the pressing is increased by .125". (2). The material thickness is increased from .048 to .064". (3). The shape of the contact radius on flange is modified. We have also increased the thickness of the cork joint washer from .125 to .1562 when compressed; this washer should be made in good quality agglomerated cork. Will you please detail and instruct experimentally. A design has also been made of a die cast aluminium cover E.CD.1250 as an alternative. It is not proposed to detail this unless the stiffened pressed steel covers prove to be unsatisfactory. DA.{Bernard Day - Chassis Design} | ||