Well, this thread has been full of great info. I'm glad we were able to get a more indepth look at the Jett Engineering Co and their products.
Now, this is slightly off of the path, and really doesn't belong in this forum.....but, I recently found a web-site where a US company is making scale, functional replicas of vintage engines (automotive and aeromotive). They were recently featured in an engineering magazine I subscribe to. Their next project is to build a funcitional replica of the P-51 Rolls Royce Merlin engine. My understanding from the article is that the aeromotive engines are actually used in model airplanes as well as static/dynamic displays.
I hope you enjoy.
http://www.replicaengines.com/products.htm