you know its funny I have been racking my brain on this one for a few days now. I will have to say their are three. the first was my origenal camroc. Found it at a yard sale back in the 80's for a buck never opened. she flew three times. first two times she busted a fin, the final time she got ran over by some smuck on driving on the field in his offroader. the second was my hornet she never flew right. the thirs was an estes america. landed in a tree almost every time.