Hi Edward,
Jan Ridder is a prolific model engine builder in the Netherlands who has designed many model engines including hit and miss, Stirling and flame gulpers. They are all made from bar stock which means that there are no expensive castings to be damaged.
He is very generous and offers his plans freely to anyone who asks by email. His site is in Dutch and English (left side top to change) Here is his site, it is well worth a look, if only to see his beautiful engines. There is also a small engines group on Yahoo.
Here is one of Jan's engines:
Regards
Terry
PS I've just come across this Model Engine Makers forum, I found it from Arc Eurotrade site.
T
Edited By Terryd on 13/10/2012 15:17:04