Also, the other day when I came in for landing, cut the throttle, came in for final approach, I couldn't get it on the ground! It just cruised along at head height! When it flew past me I could see that the prop was still spinning. I managed to get it to cut when it went past me, and fell to the ground. This has happened again since then and has ended in much wors situations - short landing space to start with get all the way to one end without touching ground, at the end of landing space: house, power lines, tree. It ended up clipping the powe line and hitting the tree. but it's OK. Has this happened to anyone before? If so what did you do about it?