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 failures and observations during a vehicle test run.
| Identifier | ExFiles\Box 54\3\ Scan022 | |
| Date | 19th August 1921 | |
| -2- Date. | Total hrs. run. | Remarks. 10.8.21 | | Standard N.S. springs fitted. 11.8.21 | 70 hrs. 10 mins. | Centre bolt broken N.S. Spring. | 73 " 35 " | O.K. 12.8.21 | 80 " 31 " | Front shock absorbers taken off (worn out) 13.8.21 | 81 " 21 " | Centre bolt broken N.S. Spring. 15.8.21 | 87 " 6 " | O.K. 16.8.21 | 89 " 56 " | Top leaf N.S. spring broken 25 hrs. 15 mins. brinell 444 | 90 " 11 " | Top leaf O.S. spring broken U.S.A. 56 hrs. 56 mins. B. 444 17.8.21 | 91 " 11 " | 6, 7 and 8 leaves broken 9th. cracked. O.S. spring 57 hrs. 56 mins. | | Frame cracked at N.S. front cross member bolt hole. 18.8.21 | 94 " 11 " | O.K. 19.8.21 | 94 " 36 " | 2, 12 and 13 leaves broken O.S. spring 61 hrs. 21 mins. Test finished. Radiator brackets O.K. Radiator fouls brackets where cleared away at bottom for brackets. | ||