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).
Performance graphs for a standard rear road spring showing tip deflection and hysteresis.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan052 | |
| Date | 1st September 1928 guessed | |
| A STANDARD REAR ROAD SPRING 40/50 F78536 CLEAN AND LUBRICATED BUT NOT CADMIUM PLATED LOADED AT TIP. KNIFE EDGE AT CENTRE NO SPRING CLIPS OR PAD. TIP DEFLN. INS. 12 10 8 6 1000 1200 1400 1600 1800 HYSTERISIS 56 56 48 40 36 TIP DEFLN. INS. 10 8 6 1000 1200 1400 1600 1800 60 48 46 40 | ||