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Attached is a spreadsheet for steam port area.The original info courtesy of Sandy Campbell.Best RegardsBob
Im making a 2x scale elmers #24 beam and an thinking of drilling the cylinder soon. General question concerning port sizes, should I just double the linear dimension ie diameter or double the port area?For this piston type valve im thinking double the diameter will keep the timing right but other engines maybe its the area.Im sure for a toy it does not matter a jot but im generally interested
Hi Guy's,Your fixed 0.094" width gave some great fun answers if you increased the stroke too much... try 27" with your original and you will see what I mean.I have also added/expanded some of the notes.Hope you approve.Best regards.Sandy.