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 of breakages recorded during a bump test of a new front axle and brake scheme.
| Identifier | WestWitteringFiles\L\Jan1924-March1924\ Scan40 | |
| Date | 2nd January 1924 | |
| SHEET 1. 40/50 HP. BUMP TEST OF NEW SCHEME OF FRONT AXLE AND BRAKES, ETC. Conditions of test :- Drum makes 105 r.p.m. Lift of Cam 2". Tyres at 65 lbs./sq.in. Load 600 lbs. + top half of Crankcase and full Radiator. Front Axle & Brakes C.71030 - Steering C.71205 - Side Steering & Tube E.70666 - Radius Rods N.Sch.1469 - Springs & Fittings N.Sch. 1469 - Fugeot Shock Absorbers. Total running time. hrs. mins. | Piece No. | Running time hrs. mins. | BREAKAGES. Description and Remarks. --- | --- | --- | --- 8 57 | F.4636 | 8 57 | N.S. front spring top leaf broken in two places - 1" to front and 2¼" to rear of centre bolt. Both front springs replaced by Firths. 14 57 | F70327 Firths | 6 0 | N.S. front spring top leaf broken 2" forward of centre bolt. Replaced by Firth. 17 30 | F.6985 | 17 30 | Steering column outside tube broken at lug connecting same to steering gearbox. | F.2871 | 17 30 | Cross member steering column clip broken. 17 45 | F.70545 | 17 45 | Steering pendulum broken 2" from ball joint end. 19 40 | F.70328 Firths | 10 43 | O.S. front spring top leaf broken 9¼" to rear of centre bolt. Replaced by Firth spring 24 41 | F.9702 | 24 41 | Steering rocker shaft arms broken off. 27 35 | F.70328 Firths | 12 38 | N.S. front spring top leaf broken 7" from rear shackle. New Woodhead top leaf fitted. 32 37 | F.70545 | 14 52 | Steering pendulum broken into rocker shaft hole. | ||