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).
Specification sheet detailing spring ratings and shock absorber loads for various spring models.
| Identifier | ExFiles\Box 68\2\ scan0109 | |
| Date | 26th November 1925 | |
| .2. RHC{R. H. Coverley - Production Engineer}12/BE. 26.11.25. STANDARD EAC SPRING F.1456 Spring Rating Load Spring Length Nil 1.200 65 lbs 1.150 103 lbs 1.100 179 lbs 1.050 229 lbs 1.000 256 lbs .950 272 lbs .900 352 lbs .850 389 lbs .825 Shock Absorber Load Load applied on 8.000 Lever Spring Length Nil 1.200 F.Length 6 lbs 1.150 13 lbs 1.100 18 lbs 1.050 24 lbs 1.000 29 lbs .950 32 lbs .900 34 lbs .850 40.75 lbs .825 IMPROVED EAC SPRING F.73737 Nil 1.800 F.Lgth 218 lbs 1.750 370 lbs 1.700 500 lbs 1.650 700 lbs 1.600 820 lbs 1.550 Nil 1.800 F.Length 8.25 lbs 1.750 16.25 lbs 1.700 24.25 lbs 1.650 35.25 lbs 1.600 44.25 lbs 1.550 52.25 lbs 1.500 57.25 lbs 1.450 62.25 lbs 1.400 63.25 lbs 1.390 STANDARD GOSHAWK SPRING F.51491 Load Spring Length Nil 1.450 F.Lgth 85 lbs 1.400 158 lbs 1.350 258 lbs 1.300 355 lbs 1.250 420 lbs 1.200 475 lbs 1.150 535 lbs 1.100 580 lbs 1.050 Load applied on 8.000 Lever Spring Length Nil 1.450 F.Length 8 lbs 1.400 14 lbs 1.350 20.75 lbs 1.300 25 lbs 1.250 29 lbs 1.200 34.75 lbs 1.150 38.25 lbs 1.100 41.25 lbs 1.050 IMPROVED GOSHAWK SPRING F.53833 Nil 1.450 F.Lgth 92 lbs 1.400 173 lbs 1.350 276 lbs 1.300 406 lbs 1.250 574 lbs 1.200 668 lbs 1.150 810 lbs 1.100 891 lbs 1.050 Nil 1.450 F.Length 9.25 lbs 1.400 16.25 lbs 1.350 26.25 lbs 1.300 34.25 lbs 1.250 42.25 lbs 1.200 50.25 lbs 1.150 56.25 lbs 1.100 60.25 lbs 1.050 | ||