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).
Bumping test of the rear of a chassis to test the forward frame brackets of the rear springs.
| Identifier | ExFiles\Box 80\3\ scan0023 | |
| Date | 6th March 1914 | |
| From Exp. Dept. Copies for: J.{Mr Johnson W.M.} R.{Sir Henry Royce} Da.{Bernard Day - Chassis Design} Na.{Mr Nadin} Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}4/L6314. March 6th. 1914. Report on bumping test of rear of chassis to test the forward Frame Brackets of Rear Springs F4273 - X.879. This test has been run previously for 6 hours 25 minutes and was reported on February 25th, ref. Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}20/L25214, several cross member flanges were broken on this occasion. A single brake axle was used with no gears or shafts inside. The wheels were shod with 895 X 135 Palmer tyres inflated to a pressure of 80 lbs. New cross members were fitted in front of gear box and at the rear spring bearings. The test was continued with these new parts and after running 15 minutes the off side back axle tube broke off G2103 short at the shoulder at the small end of the taper on the tube. The total running time of the axle is 6 hours 40 mins The breakage occured in the corner against the face which the brake bracket fits against. I am obtaining a complete double brake axle fitted with the pressed steel boxes and will test this. 3" humps were used at 105 revs per min. during the test. The spring anchor bracket F4273 was still undamaged when the chassis was taken off the machine for repair. Handwritten notes: G2760/1 double Brake X G2103/1 Single " | ||