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).
Table logging component breakages and time run during a bump test on the Goshawk chassis front end.
| Identifier | Morton\M1.6\ img032 | |
| Date | 15th December 1921 | |
| BUMP TEST ON GOSHAWK CHASSIS - FRONT. Breakages | Time run. hours. | Remarks --- | --- | --- O.S. Steering Lever and pivot. | 25¼ | The fracture has occurred through the rear bolt hole, the pivot and the lever are broken. Top leaf of front spring - O.S. | 14¼ | Leaf made by R-R.{Sir Henry Royce} Top leaf of rear spring - N.S. | 18¼ | * * * Top leaf of rear spring - N.S. | 19¼ | * * * Front Axle. | 19¼ | Broken close to N.S. spring seat. Top leaf - O.S. | 8¼ | Woodhead spring. Top leaf - N.S. | 19¼ | * * * Engine suspension tube - N.S. | 20¼ | Similar fracture to previous one. Spring clip - N.S. | 10¼ | Three bolts holding steering column to box. | 62¼ | Front axle. | | Broken close to N.S. spring seat. Steering Lever - O.S. | 19¼ | Fractured in same place as original ones. R.R. 199 (250 T) (SD676 19-7-17) MP180865 | ||