Abstract
In the previous paper, the authors presented a simple technique for computing indicated work of piston crank drive machine. In this study, the same way is applied to Ross York Drive machine, and a similar formula is obtained analytically. It allows us usage of an electric calculator instead of personal computer. For results of isothermal analysis, the error of the formula using six pressure data per cycle is within ±0.9%, as compared with numerical integration. Then it can be confirmed that the present method has enough accuracy for practical usage.
