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).
Summary table of road spring failure test results for an E.A.C.II chassis, including a diagram of the leaf spring.
| Identifier | ExFiles\Box 69\2\ scan0246 | |
| Date | 12th December 1924 guessed | |
| SHEET 3. BUMP TEST OF E.A.C.II CHASSIS CONTD. ROAD SPRING FAILURES CONTD. SUMMARY OF SPRING FAILURES. Ref. No Piece No. * Position of Spring Position of Leaf ‡ Position of Fracture Compression Rebound Approx. Running Time Thickness of Leaf Brinell at Fracture 025. F71929. A Near. Top. 1.75" to rear 2.0" 2.5" 10 HRS. 30 M.{Mr Moon / Mr Moore} .285" 375 026 F71930 A Off Top 2" to rear 1.9" 2.5" 10 - 55 .291" 388 027 F71929 A Near Top 1.75" to rear 1.9" 2.4" 21 - 15 .287" 352 028 F71930 B Off 5th (from top) 2.5" to rear 1.9" 2.5" 27 - 48 .231" 375 C 7th .. 8.5" to rear 27 - 48 .235" 388 029 F71929 A Near Top 2" to rear 1.8" 2.6" 12 - 53 .280" 375. 030 F71930 D Off Top 13" to rear 2.0" 2.4" 38 - 22 .293 375 031 F71929 A Near Top 2" to rear 1.7" 2.5" 17 - 37. .292" 388 032 F71929 A Near Top 1.75" to rear 1.8" 2.5" 23 - 25 .288" 375 ‡ MEASURED FROM CENTRE BOLT. * POSITION OF FRACTURES. FRONT. REAR. A B C D | ||