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).
Log of spring testing, detailing life, running conditions, and failure points.
| Identifier | ExFiles\Box 16\7\ Scan138 | |
| Date | 11th January 1925 guessed | |
| TABLE_START Column Header: Piece No. Column Header: Spring No. Column Header: Life. Hrs.Mins. Column Header: Running conditions. e.g. Dampers. Column Header: Where broken. Column Header: Brinell of broken part. Side Header: FRONT SPRINGS Row 1: F.78797, 1, 22 20, Dampers for first 7 1/2 hrs. only., Top leaf, 3 1/4" from rear eye., 375 Row 2: F.78797, 2, 24 35, As above., Top leaf, 5 1/4" from rear eye., 388 Row 3: F.78798, 3, 16 05, No dampers., Top leaf and next to it, both 2" behind centre spring pad clip., 388 388 Row 4: F.78798, 4+, 22 15, No dampers., Top leaf, 6 1/4" from rear eye., 388 Row 5: F.78798, 5+, 30 35, Dampers first 8 hrs. 25 mins. without dampers. Finished with dampers., Top leaf, 1" behind centre bolt., 388 Row 6: F.78798, 6, 69 25, With dampers., Unbroken. Side Header: REAR SPRINGS Row 7: F.79446, , 100 0, No dampers for first 57 hrs. 45 mins., Unbroken. Row 8: F.79446, , 100 0, ditto, Unbroken. (Handwritten: Broke at 70 hrs. 25 mins.) Side Header: FRONT SPRINGS REPAIRED. Row 9: F.78798, 5+, 15 since repair 45, Dampers fitted., 1st, 3rd, and 6th.leaves. Top leaf still intact after 15 hrs. 45 mins. running. Row 10: F.78798, 4+, 31 since repair 15, Dampers fitted., Unbroken. TABLE_END | ||