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 graph showing deflection versus load for American type rubber control pin bushes.
| Identifier | ExFiles\Box 151\2\ scan0306 | |
| Date | 25th August 1936 | |
| SHOCK DAMPER CONNECTING TUBE AMERICAN TYPE - RUBBER CONTROL PIN BUSHES RATING TEST LOAD W. DEFLECTION - INS. .025 .020 .015 .010 .005 LOAD - LB 100 200 300 400 500 | ||