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 2 of a letter discussing modifications to Carter's formula for a 4-bearing 6-cylinder engine.
| Identifier | ExFiles\Box 6\1\ 01-page136 | |
| Date | 1st March 1929 guessed | |
| contd :- -2- The third diagram attached shews the extra terms that we have added to Carter's formula to make it cover a 4-bearing 6-cyl. engine. I should be interested if you would try it sometime on the example that you have at Cambridge, and let me know the results. I sent the single-crank stiffnesses (corrected and out-of-bearings) to Carter on Tuesday evening as you required. I shall be able to send you some experiences with the electrical excitation experiments shortly when we have got a little way ourselves. We shall start on one of our car engines where we know the critical speed accurately. Yours faithfully, | ||