Starting last winter I began constructing a steam engine from a set of Model Maker Plan Service blueprints and solid billet. I have been deviating from the plans on several points...I am doubling the size and modifying the design to add reversing linkage. I have been working up the modifications in Solidworks to review the changes in 3d simulation before committing to actual construction of the various parts. The overall size is approximately 11" tall with a 1.5" piston. It is of a rather odd design in that it has a closed crankcase instead of the usual open design of most steam engines
I have a question regarding the expansion link valve rod pin. The slot in the expansion link is 1/4" can i use a 1/4" round pin...or should i use a die block...if i use a die block...the pin will likely only be 1/8" is this to small? Or should i mill out the slot to 5/16 and use a 3/16 pin? Since this is my first engine and reverse was not included in the engine plans, i have nothing to guide me. Any help appreciated.
Im adding reversing to a model maker steam engine..its approximately the same size as a Stuart 4V. Since this is a deviation from plans..I don't have any dimensions to go by for thickness. While I was able to take pictures of other engines to get size and shape...but I don't know what thickness would look best...in thinking somewhere between 3/16 to 1/4 inch (4.7-6.3mm). Anybody have any thoughts?