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On The Balance and Inertia Torque of Multi–Cylinder Engines

Published online by Cambridge University Press:  28 July 2016

E. J. Fearn
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Extract

In a previous issue the equations of motion were obtained of a piston operated by an auxiliary connecting rod. together with the stresses in such a rod and its effect on the master rod stresses. In the following article the problem of the balance and the torque due to inertia forces has been examined and equations derived which may be applied to any multi–cylinder engine.

The following equations show that all balance and inertia torque equations for a single cylinder may be reduced to the form of Σ[f1 (sin θ) +f2 (cos θ)]. These functions are combined vectorially for the multi–cylinder engine as shown in Appendix II. of the previous article.

Type
Research Article
Information
The Aeronautical Journal , Volume 32 , Issue 213 , September 1928 , pp. 799 - 806
Copyright
Copyright © Royal Aeronautical Society 1928

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References

Note on page 799 * ”The Articulated Connecting Rod,” Journal, Feb., 1927.

Note on page 799 † See “ A Treatise on Engine Balance Using Exponentials,” by P. Cormac, (Chapman & Hall).

Note on page 800 ‡ Which agrees with Capt. Morris. See Journal, April, 1927.

Note on page 801 § If (m/4—1) be equal to some whole number X and the fraction 1/2, then the number of terms in the series is (X+l).

Note on page 802 ‖ If (m/2 —1) be equal to an odd whole number (Y+l), then the number of terms in the series is Y.