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).
Summarizing failures during a 7,000 miles test for chassis 9-G-111.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan217 | |
| Date | 12th June 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: C CHASSIS 9-G-111. SUMMARY OF FAILURES DURING 7,000 MILES TEST CARRIED OUT FROM 8.8.25 to 30.8.25. | TESTED AT. | TOTAL MILES RUN. | REMARKS. | |---|---|---| | Chateauroux. | 12,502 | F.51863 side steering tube spring broke. | | " | 12,807 | Failure of two bolts in slipper wheel, damaging cam wheel. | | " | 4,807 | N.S.F. spring - second leaf from bottom - broke 7/8" rear of centre bolt. New F.53585 - 650 lbs. spring fitted. Supporting rod to top of radiator broke at dashboard end. | | " | 5,250 | O.S.F. wing stay (front). Broke 3" from outside end. | | " | 5,750 | O.S.F. wing stay (second) broke where bolted to frame across top bolt holes. | | " | 16,004 | Bonnet support on rad. broke. N.S.R. spring broke - top and 4th. leaves broke 9" from centre bolt, front end, and 3 1/2" from front end respectively. New F.51908 - 900 lbs. fitted. Flange on exhaust pipe, making joint to exhaust box, broken off half way round. | | " | 16,254 | Exhaust box cracked right round, near Nos. 5 and 6 port. | G.W.Hancock. | ||