Aircore??
They are a heavy plane. I used a us aircore knighthawk as a trainer. It didn't glide very well. I used a .46 fx in mine, which was a good choice. They do need a powerful engine. But overall I learned to fly with it. And it survived several crashes. One crash it survived was hitting a fence post. All it did to the plane was strip a throttle servo and rip the engine out of the plane. But 15 minutes later the plane was back in the air. It is now 6 years old and still in flyable condition. They are a good knock around plane... literally.
Scott