The Aircore planes are very similar to the SPAD models ( www.spadtothebone.com ) They are made of "coroplast" which is the now common corrogated plastic signboard.

The material is very resiliant. But there is no such thing as an indestructable model.

Use of the SPAD gluing techniques and CA instead of the contact cement listed in the Aircore kits will save weight. This is just as strong and makes the aircraft fly better.

A properly built Coroplast plane CAN bounce instead of being smashed in a crash... depending on the crash. However the shock loads in such an impact can still damage the radio system and/or the engine when the airframe is left unharmed. This makes it necessary to do a careful range check to determine if the radio is Ok after any impact... no matter how minor it appeared.

I have demonstrated the durrability of coroplast aircraft by purposefully doing a knife-edge "landing" of a coro-P-51... with appx 70 yard cartwheel down the runway. No damage at all. (a balsa model would have been shredded.) Howegver after a few f these demos... I have managed to shatter the spar inside the coro wing.

I have also seen a coro model have a minor impact which SHOULD have given no damage to a balsa model... and the coro was flexed in a manner that made the aircraft trash.