Matthew asked this question in 3 different forums. From them, it looks like it's a small plane that would take a .15 to .25 nitro engine. A natural alternative would be a .30 4 stroke. However...

Matthew, I have a few observations and questions.

First, while the car people tend to use the term "gas" when talking about alcohol/nitro fueled engines, you will find that plane people do not do the same. When we talk about "gas" engines, we mean engines that are powered with gasoline. The engines fueled by alcohol/nitro fuel are commonly called "nitro" or "glow" engines.

Next, is this your first plane? If so, it may not be the best choice. I've flown this size Piper Cub and while it was fun, it was extremely challenging to get off the ground. The problem is that the design doesn't like to go straight during takeoff. It's just not a good beginner plane.

Also, if you haven't flown yet, do you have an instructor? The instsructor can help you choose a more appropriate first plane. This will significantly reduce the chances of destroying your plane the first time our. You can also look at the list of beginner planes that is pinned to the top of this forum: http://www.rcuniverse.com/forum/m_4537845/tm.htm