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 the results of a bumper test on a chassis, tracking hours run and component failures.
| Identifier | ExFiles\Box 80\2\ scan0163 | |
| Date | 2nd June 1920 | |
| X.2628b. 2.6.20 X-1381 BUMPER TEST. X.2628 & X8981 2" Cam. 105 R.P.M. Special rear springs - no nibs. and slots - ground all over. O.S. F.7790. - Loaded lbs. 2160 N.S. F.7789 - " " 2069. | Total hours run on chassis. | Remarks. | Hours run | |---|---|---| | 13.5.20. | ------ | | | 14.5.20. | ------ | | | 15.5.20. | Shock Absorber fitted N.S. (Drg.) F.419 Bolt on centre spring (Brkt. F.2406.(O.S.) | 10 hrs. 5 mins. | | 17.5.20. | Spring tie clip O.S. - rivet broken (front) | 13 " | | 18.5.20. | " " N.S. " " (rear) | 22 " 15 " | | 19.5.20. | F.419 Bolts on centre spring (bracket F.2406. O.S. | 12 " 40 " | | 28.5.20. | Nut holding shock absorber case to tank loose. O.S. spring top leaf broken 3rd. 4th & 5th. leave cracked half way across under spring clip (front). Wearing plate cracked. N.S. spring 3r.d & 4th leaves broken under clip top and 5th th leaves cracked. | 35 " 30 " | | | | 35 " 40 " | 30 hrs. 40 mins. total hrs. run. | ||