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 sheet detailing component breakages and failures during running tests.
| Identifier | ExFiles\Box 119\2\ scan0192 | |
| Date | 1st April 1924 guessed | |
| Total running time. hrs.mins. | Piece No. | Running time. hrs.mins. | BREAKAGES. Description and remarks. 73 5 | F.71009 | 18 30 | O.S. front spring (Firth 1250 lbs.) top leaf broken 2" to front of centre bolt. 76 35 | F.7387 | still running | Crack started in N.S. frame member, running horizontally at the base of 1st. cross member. 78 7 | F.7387 | 53 27 | N.S. frame member cracked vertically through radiator bracket bolt hole. New frame fitted (excluding dumb iron springs, anchorage etc. 80 49 | | 80 49 | Both bolts sheared which attach steering arm to near side stub-axle. 81 29 | F.4614 | 81 29 | Front buffer spring of front joint side steering tube broken. 84 19 | F.71009 | 23 26 | N.S. front spring (Firth 1250 lbs.) top leaf broken 2 1/4" to front of centre bolt. 87 0 | F.4614 | 5 31 | Front buffer spring of front joint side steering tube broken. | F.4614 | 37 0 | Rear buffer spring of front joint side steering tube broken. 96 45 | F.71009 | 23 40 | O.S. front spring (Firth 1250 lbs.) top leaf broken 2" to front of centre bolt. Spring failures - N.S. - 4 O.S. - 5 Total - 9. Average life of springs. N.S. - 24 hrs. 11 mins. O.S. - 19 hrs. 21 mins. Irrespective of position - 21 hrs. 30 mins. Log continued :- | ||