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 from a bump test performed on a front chassis, detailing observations and component failures over time.
| Identifier | ExFiles\Box 119\2\ scan0134 | |
| Date | 2nd October 1920 | |
| X.1031 V.103/ BUMP TEST - FRONT CHASSIS. X.4062 2.10.20 New type rear engine suspension brackets. Dunlop wire wheels with 72 spokes. Date. hrs. run. Remarks. 17.9.20 4 O.K. 18.9.20 6 hrs. 25 N.S. diagonal stay bolt K.7407 broken. 20.9.20 9 " 20 Petrol tank supports rivets loose - replaced by bolts - shock absorbers dis-connected. 21.9.20 10 " 40 O.S. spring broken. 22.9.20 339 " 35 - on rear. 44 " 25 - " front. Petrol tank taken off. Shock absorber supports fastened inside tank loose. 22.9.20 18 " 25 O.K. 23.9.20 21 " 40 N.S. spring broken. 24.9.20 23 " 20 O.S. spring broken. 25.9.20 23 " 45 O.K. 27.9.20 26 " 35 New type rear engine suspension brackets tightened up - N.S. 1/3rd. of a turn O.S. 1/16th. " " 27.9.20 29 " 5 Brackets appear to be too weak. O.K. 28.9.20 36 " 30 N.S. spring broken. 29.9.20 39 " 35 O.S. spring broken. 30.9.20 43 " 0 Front Shock abs:ball end on axle, nut loose 1.10.20 46 " 20 O.S. spring broken. 2.10.20 49 " 55 O.K. | ||