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).
Three graphs showing rear road spring tests after cadmium plating, without clip and spring pads.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan053 | |
| Date | 8th September 1928 guessed | |
| REAR ROAD SPRING TESTS - F 78536 - B AFTER CADMIUM PLATING WITHOUT CLIP AND SPRING PADS. SPRING TIP DEFLECTION - INS APPLIED LOAD - LB APPLIED LOAD - LB - SPRING TIP TEST Nº 3 HYSTERISIS 28 22 18 14 10 TEST Nº 2 20 20 20 TEST Nº 1 40 36 30 22 12 12 10 8 1200 1400 1600 1800 2000 | ||