Actually , the wing on the Aerobird Extreme is constructed of a foam core with a plastic covering , and the rod you speak of is carbon fiber . This only helps to strengthen the wing , not make it impervious to the type of manouevers you were trying to perform . As the others have said , if you fly any given airplane beyond what it is intended to do , it WILL break ! I started flying with the Aerobird Challenger , and broke several wings by loading them too much in dive-pull outs and flying in too much wind . They are tough planes for sure , and survived MANY crashes while i learned their limits . I proceeded to fly my way through the entire Hobbyzone and Parkzone line of planes , and modded them where needed to increase their strength where needed . I still fly many of them today , but have since graduated to nitro planes . I found out just the other day the strength of the airframe on my Twist . After a session of Blenders , Snap Rolls and other high G manouevers i landed and inspected my plane before the next flight . I found that the fuse had cracked at the rear of the wing saddle , and was only held together by a few splinters , and the Ultracote .[X(] This after wring-out inspection prevented my plane from becoming a statistic , and costing me more money , not to mention sending an accident waiting to happen back into the air . If you are gonna fly like that , you HAVE TO be diligent in your inspections after EVERY flight . Don't mean to sound like i'm preaching , just trying to help a new flier learn quicker , and not the hard way like most of us have .

Oops with the underlining , how did that happen ?[&:]