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 the principles of balancing engine mass, including an out-of-balance couple formula and diagram.
| Identifier | WestWitteringFiles\M\2October1924-December1924\ Scan4 | |
| Date | 9th October 1924 guessed | |
| EFC1/T6.10.2 4 -14- Contd. (b) In the (b) case the equi-momental system of three massive particles breaks down (because two of them become infinite), but it is not needed. It is clear from principles referred to early on, that the whole of the con. rod mass can be considered at P for the purpose of linear balance and that there will then remain the out-of-balance couple M k² ö, this being the equivalent of the expression given for the couple in the (a) case, b now being zero. Balancing to the extent of Mx{John H Maddocks - Chief Proving Officer} and Mp, in this case, would be meaningless because Mp is infinite. (c) In the (c) case, the interest lies in the fact that in the correct circumstances the linear balancing of a single cylinder engine can be completely effected by crankshaft revolving masses only. Diagram labels: Mx{John H Maddocks - Chief Proving Officer}, X, φ, a-l, a, O, Mp & Mg, P, G Contd. | ||