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).
Test report on an old type steering pivot, measuring deflection and permanent set under increasing loads until failure.
| Identifier | ExFiles\Box 2\B002_X168\ 00000001-page011 | |
| Date | 10th October 1919 | |
| A2/STEERING/1/10.10.19 -4-3 2. Old type steering pivot used, we took one off 16E9 for the job, same arrangement used for the test. Weight | Deflection. A | Deflection. B | Permanent set. A | Permanent set. B | Remarks. 400 lbs. | .060" | .012" | .000" | .000" | 800 " | .095" | .026" | .000" | .000" | Pivot which was at first slightly stiff became quite easy. 1200 " | .121" | .041" | .002" | .000" | 1600 " | .149" | .062" | .004" | .001" | 2000 " | .172" | .082" | .005" | .001" | 2400 " | .197" | .107" | .008" | .002" | 2800 " | .218" | .129" | .008" | .002" | 3200 " | .239" | .149" | .008" | .002" | 3600 " | .258" | .167" | .008" | .002" | 4000 " | .280" | .186" | .010" | .002" | 4400 " | .299" | .205" | .010" | .003" | 4800 " | .318" | .224" | .010" | .003" | 5200 " | .330" | .241" | .011" | .003" | Pivot began to tighten (gradually increasing with the weight) 5600 " | .350" | .258" | .011" | .003" | 6000 " | .375" | .276" | .012" | .004" | 6400 " | .395" | .295" | .012" | .004" | 6800 " | .418" | .315" | .013" | .004" | 7200 " | .444" | .332" | .014" | .004" | 7600 " | .473" | .350" | .015" | .005" | 8000 " | .505" | .369" | .016" | .005" | 8400 " | .539" | .385" | .018" | .006" | 8800 " | .578" | .410" | .020" | .008" | 9200 " | .611" | .435" | .021" | .008" | 9600 " | .645" | .455" | .023" | .010" | 10000 " | .671" | .471" | .025" | .010" | 10400 " | .715" | .495" | .029" | .013" | 10800 " | .775" | .515" | .038" | .015" | 11200 " | .830" | .550" | .042" | .021" | 11600 " | .900" | .585" | .050" | .025" | 12000 " | .990" | .625" | .060" | .031" | 12400 " | 1.090" | .665" | .071" | .043" | 12800 " | 1.190" | .720" | .080" | .052" | 13200 " | 1.300" | .770" | .090" | .062" | 13600 " | 1.550" | .820" | .102" | .079" | - | 1.760" | .880" | - | - | Stub axle broke close in the neck, the metal looked crystalline & not in very good condition. Fracture Note that there was not so much deflection or permanent set as in the first one tested, which would not break. the deflections and permanent sets in the axle took place in the deflections and permanent sets in the spring nest. | ||