I've had one with Webra.50 twostroke and now I have one with Saito .82. Both engines give enough power, pick your poison
A ziptie secure the wings.
video
[link=http://www.youtube.com/watch?v=Co1JhYK0wH0]Saito .82 / APC 14x4w[/link]
video
[link=http://www.youtube.com/watch?v=cNQuvkvpS5Y]Webra .50 / APC 12x4[/link]