I'm designing a stirling engine for a high school engineering project. I need to know more information about them though before I start machining out the parts. I looked at Wikipedia and a few other sites, but I need something a little more in depth. I'm looking for a good stirling engine book or perhaps a the contact info of a knowledgeable person who is willing to check out my designs and critique them or any other info related to stirling engines that could be helpful. Thanks.