It isn't a 3D plane, but it's a great imac flyer. I love mine. I run a ST 75 with a pitts. I closed off the pipes a bit to increase the back pressure. I replaced the 8 oz crap tank that comes with it with a 12 oz. Get around 25 minutes at full throttle, she just sips fuel. Is pretty darn fast. I've got other planes for 3D, this is my IMAC plane....