Welcome to ModelEngineMaker !If you have problems registering or logging in, please use the contact menu option to request assistance.
As you can see it's a bit different to the usual Westbury based designs that most models seem to be based on having the power piston concentric to the displacer.
While others have started getting their Christmas castings in early I've let Santa treat me to a set of drawings for this engine and will be busy filling my stockings with barstock or possibly wood if I decide to make some patterns and get some of the parts cast.http://www.de.heinrici-heissluftmotor.de/html/index.htmlAs you can see it's a bit different to the usual Westbury based designs that most models seem to be based on having the power piston concentric to the displacer.Along with the A3 size drawings and a detailed build guide ( in German) there are a number of photos of an original engine both assembled and in pieces so should be able to get it looking fairly correct. Price was a very reasonable 20 Euro for digital drawings but Rolf will also do printed for 25 Euro and speaks (writes) good English.
What about a Gardner Jason?
First image shows the Trace function being used in Alibre where an imported image, in this case a snip from the drawing file, can be shown on the screen and drawn over.