Rolls-Royce Archives
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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
  
  


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