I don't have personal experience with this model. I have seen other WW-I models and a common problem is they have small rudders compared to more modern models. On takeoff be active with the rudder and feed in throttle slowly. Abort a lot till you find the trick. Years ago I saw one do an inverted flat spin and and the pilot, our most experience pilot, could not recover it. It flat spinned all the way to the ground. The amazing thing is that there was little or no damage because it was falling vertically very slow, but spining rapidly. Sometimes a little up elevator at the start of the takeoff helps helps in tracking, but there is danger of a snap roll if held too long. Go Slow. The challenge is worth it.