Last week a friend of mine gave me a copy of the 19 June, 2003 issue of _Machine Design_ magazine. Pages 72-75 have an interesting article on diesel engines for airplanes. That's right, diesels! How about a twin flying 127 mph and burning 3.0 gph, or the same plane at 80% going 208 mph burning 10.7 gph! Interesting!
If you would like to read the article for yourself and you don't get the magazine you might ask a friendly tool and die shop if they get it. From what I can see from the first few pages it looks like this is one of those magazines that is completely supported by the advertising so that it can be sent for free to targeted businesses. Enjoy.