One great place to see Hog Bipes is the Fubar Hill website. They maintain a section dedicated to Hog Bipes. you have find it here: [link]http://www.fubarhill.com/sighog.html[/link] . Definitely a great place to get some ideas.

You have to put a 4-stroke on a Sig Pig. If you don't, the Biplane Police will come get you!!! Honestly though, you can run a 2-stroke on one but it just doesn't "sound" right!!!! A 4-stroke has that low throaty grumble that sounds so good on a biplane!!

Ken