While I agree with Myron that 1 hp is excessive, you can still use your motor. Just don't prop the life out of it. It will happily do 1/2hp and you don't need to ever worry about it burning up.
That said, if you want a serious plane, go for a Windrider Queen Bee. 100" wingspan. 1hp will fly that plane nicely. At 100" you will have no wind problems.