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 for a bump test on a front chassis, detailing issues with suspension and other components over time.
| Identifier | ExFiles\Box 80\2\ scan0215 | |
| Date | 2nd October 1920 | |
| HS{Lord Ernest Hives - Chair} X2628 BUMP TEST - FRONT CHASSIS. 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. Petrol tank taken off. | 44 " 25 | - " front. Shock absorber supports fastened inside tank loose. 23.9.20 | 18 " 25 | O.K. 24.9.20 | 21 " 40 | N.S. spring broken. 25.9.20 | 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. (upside down text at bottom) R.R. 255A (T) 100 (S.) 159 11-2-20 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2500 | ||