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).
Graph showing the results of torsional oscillation tests on a B.80 No. 3 engine with a 2.75' diameter shaft, without a damper.
| Identifier | ExFiles\Box 124\1\ scan0081 | |
| Date | 28th March 1933 | |
| TORSIONAL OSCILLATION TESTS ON B.80 NO. 3 (2.75 DIA SHAFT) No DAMPER AMPLITUDE DEGREES ENGINE R.P.M. FIG. 2 JRS 28.3.33 Y-Axis labels: 1.4, 1.2, 1.0, .8, .6, .4, .2, 0 X-Axis labels: 0, 1000, 2000, 3000, 4000, 5000 | ||