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).
Graph comparing the load versus deflection for Continental and Standard rubber buffers on a 40/50 rear axle.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan072 | |
| Date | 30th March 1928 guessed | |
| MEASURED RATING OF RUBBER BUFFERS 40/50 REAR AXLE LOAD - LBS: 1200 1000 800 600 400 200 0 DEFLECTION - INCHES: 0 .1 .2 .3 .4 .5 .6 CONTINENTAL RUBBER 1.000" DEEP STANDARD RUBBER 1.500" DEEP | ||