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).
Series of three graphs showing the results of road spring tests measuring deflection versus applied load.
| Identifier | ExFiles\Box 67a\2\ scan0196 | |
| Date | 18th August 1928 | |
| J.{Mr Johnson W.M.} 18-8-28 ROAD SPRING TESTS 1100 LB- STANDARD FRONT - F.71975 - OFF 78 N.K. AFTER 3½ YEARS SERVICE CLEANED AND LUBRICATED HYSTERISIS LBS. TEST Nº3 70 60 50 40 DEFLECTION - INS. 5.5 4.5 3.5 1200 1400 1600 1800 2000 APPLIED LOAD - LB- TEST Nº2 40 38 36 34 TEST Nº 1 24 24 24 24 | ||