Thanks for your comment. I think the fuel is 15%-20% nitro, which is sold by Technic Japan under the trade name "Clotz" for helicopters, or 15%-20% nitro of the glow fuel "Nitro-X" sold by OS Engine. The engine is OS32, I forgot the detailed model number. I've never used an Enya, and YS engines are in the minority, and I've never seen anyone around me using an Enya. All of them are OS engines, and I think needles are probably the easiest engines to handle. The YS has a pressurization system in the fuel tank, so be careful. There are many silicon parts in the fuel pipe and engine body, and the engine runs stably from the beginning when the fuel is full to the end when the fuel runs out. I think there are few people who can handle it because it is delicate. The OS also comes out with a pump system engine, and the current model is also on sale.