Special thanks to Wally, who provided us with these Calculation Formulas !!!! By choosing the 2 Variables ( Displacement Cylinder Diameter and Power Cylinder Diameter ) one can then use the following Formulas to calculate approximate ideal Values for all other Data important for the Construction of a sucessfull Gama or Beta Stirling Engine. My model, by the way is a Gamma type. In this Example I have chosen 27mm for both Variables. Please remember that these are only approximate Values. As far as I know, there are no Formulas that will guaranty perfect Results. Currently there is a lot of Research being done to revive Stirling Engines and incorporate their Potential into environmentally friendly and renewable sources of Energy. 1st Variable = Diameter of Displacement Cyl. ( Cooling and Heating Unit ) = ( here our chosen 27 mm ) A = Length of Displacement Cyl. = 3 X Diameter of Displacement Cyl. = 81 mm B = Length of Heating Zone of Displacement Cyl.=2 X Diam. of Displacement Cyl.=54 mm C = Length of Cooling Zone…