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).
The load testing of a pivot, including a table of measurements, observations of failure, and a post-test condition summary with a diagram.
| Identifier | ExFiles\Box 2\B002_X168\ 00000001-page010 | |
| Date | 10th October 1919 guessed | |
| ST.3697/AFT/E.R.A. -2- 5200 lbs. .292" .072" .046" .001" 5600 " .318" .078" .047" .003" 6000 " .344" .084" .047" .005" 6400 " .368" .091" .049" .010" 6800 " .394" .098" .051" .020" 7200 " .422" .105" .053" .030" 7600 " .450" .114" .058" .040" 8000" Pivot gave a sharp loud crack, no visible signs of a break but a rapid increase in the figures. 8000 " .515" .121" .100" .060" 8400 " .572" .134" .118" .078" 8800 " .670" .150" .160" .110" 9200 " .755" .162" .217" .164" 9600 " .850" .174" .275" .247" 10000 " .970" .191" .385" .350" 10400 " 1.110" .210" .510" .510" Pivot slightly tight. 10800 " 1.275" .230" .660" .647" Pivot now quite stiff. 11200 " 1.545" .258" .812" .827" 11600 " 1.790" .285" .948" .970" 12000 " 2.080" .309" 1.055" 1.085" Condition of pivot after test, the pivot pin busher was .062" out of line, the rest of the permanent set had taken place in the stub axle close up to the neck. [Hand-drawn diagram of a flanged, tapered pin] [Handwritten notes on diagram:] Bushes .062" out of Line First bend from here. | ||