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 of calculations and analysis regarding moments of inertia and out-of-balance connecting rod couples.
| Identifier | WestWitteringFiles\M\2October1924-December1924\ Scan2 | |
| Date | 6th October 1924 | |
| EFC1/T:6.10.24. -16- Contd. M_x - M_X = (k^2 + ab)/(a(a-b)) M = b/(a-b) M_g at X and M_p - M_P = (k^2 + ab)/(b(a-b)) M = -a/(a-b) M_g at P which moment of inertia is (M_x - M_X) a^2 + (M_p - M_P) b^2 = M (k^2 + ab) resulting is a relatively very large out-of-balance con. rod couple represented by M (k^2 + a b) Ø The placing of two such single cylinder units side by side, working in opposite phase, -and each linearly balanced as described, would, mathematically, be a perfect balance, because these con. rod couples would annul one another. But for this to be fully effective the engine structure would have to be exceptionally rigid. ----- EFC. | ||