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).
Bump test report for Lemoines 40-50 chassis springs.
| Identifier | ExFiles\Box 41\1\ Scan045 | |
| Date | 6th December 1923 | |
| V3803 BUMP TEST OF LEMOINES SPRINGS, as supplied by Paris 40-50 CHASSIS SPRINGS CONDITIONS OF TEST. SPRINGS SHACKLED AT FRONT ENDS AND ANCHORED TO FRAME AT REAR ENDS. LOAD = 600LBS PLUS TOP HALF OF CRANKCASE & FULL RADIATOR. DRUM MAKES 105 R.P.M. CAMS 2" HIGH. TYRES AT 65LBS/□". SPRING. | RUNNING TIME. | PARTICULARS OF FRACTURE. OFF SIDE | 18HRS. 21MIN. | TOP LEAF BROKEN 3.5" TO REAR OF CENTRE BOLT. NEAR SIDE. | 18HRS. 53MIN. | TOP LEAF BROKEN 2.5" TO FRONT OF CENTRE BOLT. BRINELL FIGURES (AT POINT OF FRACTURE). NEAR SIDE = 341. OFF SIDE = 388. RHR | ||