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).
Rating test results for engine foot rubbers, showing deflection measurements under various loads.
| Identifier | ExFiles\Box 14\5\ Scan044 | |
| Date | 3rd January 1929 | |
| F.78114 ENGINE FOOT RUBBERS ) RATING TEST. 3.1.29. Supplied by Dunlops 2.1.29. DEFLECTION INS. Load lbs. 1Z 2Z 3Z 4Z 5Z 6Z. 0 100 .036 .035 .036 .038 .036 .039 200 .062 .060 .061 .065 .060 .065 300 .086 .085 .084 .088 .083 .087 400 .105 .104 .103 .107 .102 .106 500 .119 .120 .118 .122 .118 .122 600 .132 .135 .132 .136 .131 .135 700 .137 .137 .144 .147 .143 .146 800 .158 .159 .155 .159 .155 .159 900 .170 .170 .167 .170 .166 .170 There is a variation in free length of .008" and the shortest rubber is .038 over drg.size. Variation in deflection at 900 lbs. load .004". | ||