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).
Quality control test procedures and limits for scuttle isolation rubbers.
Identifier | ExFiles\Box 53\4\ Scan237 | |
Date | 14th August 1930 | |
X.4613. To Bv. From Hs{Lord Ernest Hives - Chair}/AJL. c. Mx.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/AJL3/AD14.8.30. SCUTTLE ISOLATION RUBBERS. Further to Hs{Lord Ernest Hives - Chair}/AJL12/AD13.8.30, in order to ensure that the Avon rubbers supplied to us are in the same quality (EL.191) as the sample approved, we suggest that a small percentage of each consignment supplied for production be tested as follows. The rubbers should be subjected to an end load of 50 lbs. and the consequent decrease in length measured. The decrease and suggested limits for each type of rubber bush are as follows. F.50729. Decrease in length .024" ± 5 F.55879. " " " .035" ± 3 F.80727. " " " .034" ± 3 F.79207 Q " " " .275" ± 15 By this means it should be possible to avoid the variation in the quality of the rubber that we found to exist in the hard type of rubber supplied by Dunlops. Hs{Lord Ernest Hives - Chair}/AJL. | ||