Johansson wrote:Getting a few books on the subject is a good idea, the main ingredience in a gas turbine is math and plenty of it... ;-)
This guy calls himself Turbojet and has a nice website with plenty of fun, he has built a "cheap" micro turbine with only the compressor wheel factory made. Many parts are made from stainless kitchen ware collected from stores.
If you have the right equipment and a bag full of patience something like this would be the way to go, it is heavy and produces little thrust therefore easier and cheaper to make and than a "real" flight engine.
Hey, Turbojer has a pretty neat little site! Looking through his picture galleries I saw he has a nice PJ collection too, including a Solar valved PJ, and a gluey.