One of the reasons I like them is that I like the idea of strapping them to a cheapo foamy. I don't think there’s a valid argument that just because you have an engine that’s costs thousands then you also need an airframe that costs thousands too. I'd prefer to spend say £1500 on a small engine and fit it to £200 worth of airframe than £3000 worth. You can have a lot of fun with them and if you crash them the chances of breaking the engine is way less than anything else. I had a bad hand launch on my JJJ powered funjet and it did 5 cart wheels across the grass at 240k rpm and tore the nose off the funjet. I taped it back on flew it for the rest of the day. Unfortunately that was the only days flying I got out of that engine...Also take the MW44 for instance, I've seen plenty of planes crash with these engines in over the years and the engines always seem to get away with it. It must me down the lower inertia but you pile anything else in and the engine in most cases comes out squashed[&o] It's also just a case of throwing the model in the back of the car with half a gallon of fuel and going flying for the day.

Jason