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).
Compression of rubber components for scuttle isolation.
Identifier | ExFiles\Box 53\4\ Scan245 | |
Date | 25th November 1930 | |
Y4618 To BY.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/AJL. Hs{Lord Ernest Hives - Chair}/AJL.1/MJ.25.11.30. SCUTTLE ISOLATION. With reference to BY/HEB{H. Biraben}10/M.24.11.30., we quite agree with paragraph (2) of Da{Bernard Day - Chassis Design}/Ev{Ivan Evernden - coachwork}'s/20.11.30. A compression of .050" on the rubber F.50729 will be unnecessarily excessive now that the rubbers at the side of the scuttle are incorporated in the semi isolation scheme. The load on these rubbers should now be decreased by 30%. You have pointed out that the compressed thickness of the rubber must now be reduced to .325" on account of alteration to the bead flange. It appears necessary, therefore to reduce the initial thickness of the rubber buffer F.50729 to suit both the alteration to the beading and the lower compression required. To give approximately a30% reduced load the initial thickness will become .360". For the sake of uniformity, there is no reason why the rubber buffer at the back of the scuttle rail (also F.50729) should not be reduced similarly. With regard to Paragraph (4) of Da{Bernard Day - Chassis Design}/Ev{Ivan Evernden - coachwork}'s memo we gather that this applies to the rubber (F.50729) at the back of the scuttle rail. We do not think it is necessary to fix a dimension for the compression of this rubber. Hs{Lord Ernest Hives - Chair}/AJL. | ||