I suppose that I need to clarify a few things about the BBQ engine. It was built a few years ago from instructions in a book written by Ted Warbrooke in New Zealand. It was supposed to be a one piston hot air engine, but when completed there was no way that I could get it to run, so to salvage what efforts that I had put into it, I modified it to a Stirling cycle, and now it is one of my smoothest running hot air engines with an interesting linkage. The black stove or wind shield resembles a Bar-B-Q, thus the name. I tell spectators that I Bar-B-Q sparrow breasts and mouse burgers and sell low calorie sandwiches to defray some of the cost of gasoline to drive to shows. (Although I really do not do that) The teapot thing, made out of a door knob is fuel filler can. It has a simple wick burner and will run about an hour on one filling of alcohol.