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).
Page discussing experimental crankshafts, the F.XI aero engine, and torsional vibrations.
| Identifier | ExFiles\Box 6\1\ 01-page128 | |
| Date | 17th April 1928 guessed | |
| contd :- -3- We shall have several more experimental crankshafts to test shortly, and we are also working hard on the problem of our F.XI aero engine torsional period. Our programme on Torsional Vibrations is still quite a big one, and we hope it will not be long before we can send you still more data. Yours faithfully, | ||