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).
Test results table detailing the lifespan and failure modes of various front axles under stress tests.
| Identifier | ExFiles\Box 49\4\ Scan213 | |
| Date | 4th September 1928 guessed | |
| -2- Piece No. Description. Time, hrs,mins. Results. Reference. F.3391 Front axle. 24 0 Cracked. Wor {Arthur Wormald - General Works Manager} /Hy {Tom Haldenby - Plant Engineer} 16/L.20114 F.3391 Front axle. 12 0 15 30 Cracked O.S. through spring clip hole. Cracked N.S. through spring clip hole. Wor {Arthur Wormald - General Works Manager} /Hy {Tom Haldenby - Plant Engineer} 11/L9214 F.3391 Front axle. 11 16 Broke. Wor {Arthur Wormald - General Works Manager} /Hy {Tom Haldenby - Plant Engineer} 18/L.17214 Average life before cracking. F.2882 Front axle. 89 hrs. Broke - Average over one. F.3391 Front axle. Old type. 12 hrs. 41 mins. Cracked - " " two. F.3391 Front axle strengthened. 22 hrs. 24 mins. Cracked - " " six. | ||