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 vibration tests on a B.80 No. 2 engine, fitted with a Cadillac damper.
| Identifier | ExFiles\Box 124\1\ scan0224 | |
| Date | 20th July 1938 | |
| TORSIONAL VIBRATION TESTS ON B.80 NO. 2, CADILLAC DAMPER .0081 SLUG FT2, FIG II, VIBRATION AMPLITUDE DEGREES, ENGINE RPM, RM{William Robotham - Chief Engineer}/JRS 20-7-38 | ||