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).
Test log detailing the lifespan, running conditions, failure points, and hardness of various springs.
| Identifier | ExFiles\Box 119\2\ scan0335 | |
| Date | 21th October 1929 guessed | |
| TABLE DATA: Column Headers: Piece No., Spring No., Life. Hrs. Mins., Running conditions. e.g. Dampers., Where broken., Brinell of broken part. Row 1: Piece No.: F.78797 Spring No.: 1 Life Hrs. Mins.: 22 20 Running conditions: Dampers for first 7½ hrs. only. Where broken: Top leaf, 3½" from rear eye. Brinell of broken part: 375 Row 2: Piece No.: " Spring No.: 2 Life Hrs. Mins.: 24 35 Running conditions: As above. Where broken: Top leaf, 5½" from rear eye. Brinell of broken part: 388 Row 3: Piece No.: F.78798 Spring No.: 3 Life Hrs. Mins.: 16 05 Running conditions: No dampers. Where broken: Top leaf and next to it, both 2" behind centre spring pad clip. Brinell of broken part: 388 388 Row 4: Piece No.: " Spring No.: 4+ Life Hrs. Mins.: 22 15 Running conditions: " Where broken: Top leaf, 6½" from rear eye. Brinell of broken part: 388 Row 5: Piece No.: " Spring No.: 5+ Life Hrs. Mins.: 30 35 Running conditions: Dampers first 8 hrs. 25 mins. without dampers. Finished with dampers. Where broken: Top leaf, 1" behind centre bolt. Brinell of broken part: 388 Row 6: Piece No.: " Spring No.: 6 Life Hrs. Mins.: 69 25 Running conditions: With dampers. Where broken: Unbroken. Brinell of broken part: Row 7: Piece No.: F.79446 Spring No.: Life Hrs. Mins.: 100 0 Running conditions: No dampers for first 57 hrs. 45 mins. Where broken: Unbroken. Brinell of broken part: Row 8: Piece No.: " Spring No.: Life Hrs. Mins.: 100 0 Running conditions: ditto Where broken: Unbroken. Broke at 70hrs 25mins Brinell of broken part: Row 9: Piece No.: F.78798 Spring No.: 5+ Life Hrs. Mins.: 15 since repair 45 Running conditions: Dampers fitted. Where broken: 1st, 3rd, and 6th. leaves. Top leaf still intact after 15 hrs. 45 mins. running. Brinell of broken part: Row 10: Piece No.: " Spring No.: 4+ Life Hrs. Mins.: 31 since repair 15 Running conditions: Dampers fitted. Where broken: Unbroken. Brinell of broken part: SIDEBAR TEXT: FRONT SPRINGS REAR SPRINGS FRONT SPRINGS REPAIRED | ||