I have the same plane with a Zenoah 45. The plane flyes very well eventhough the engine is on the heavy side. I went with the ZENOAH because I did not want to go with a an electronic ignition engine and have to run a separate batery.I am not a 3d type flyer . If you are, you may want to go with something bigger such as 55 size engine. My plane has unlimited vertical so for my type of flying is plenty. Hope this helps.