A guy in the club has a couple of these .47s and one had worked well for years, and now is giving him problems. Just cutting out when the nose points up. He found that the rubber had disintegrated and was plugging up the flow. He has not tested it yet, but seems sure that is the problem. I am keeping my eye on this because I have a couple .47s and .25s that I might need to use some day. The carb bore seems pretty big for the size of the motor to me. Maybe a bit optimistic for a sport motor? If they are no good, I will try other carbs or make my own for control line combat planes in the .25 size at least. Compare an LA or FP airbleed carb to one of these, much smaller. Dead stick practise is always a good skill to have at any rate. My first RC flights in the early 1980s were with a 2 meter glider and a TD .049, so there was only one try at a landing. I tend to keep my flights over the mowed part of the field as a general rule. No sight seeing tours in most of my planes.