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).
Deflection test graph for a 20/25 front engine mounting rubber.
| Identifier | ExFiles\Box 93\1\ scan0229 | |
| Date | 22th March 1937 | |
| WYM{G. Harold Whyman - Experimental Manager} 20/25 FRONT ENGINE MOUNTING RUBBER L.E.C. 3352 RUBBER F.60398 DEFLECTION TEST DEFN LOAD W. LB. DEFLECTION - INS .140 .120 .100 .080 .060 .040 .020 0 LOADING UNLOADING LOAD - LB 0 50 100 150 200 250 300 22.3.37 WHB | ||