Hi guys! Today we have such an unusual review micromotor. When I saw him for the first time, I didn’t even understand right away how does this micromotor work and how the micromotor should rotate at all. And what a principle. It can be seen that the engine is extremely unusual. There are no valves but the engine (motor) is already 4-stroke and somehow it should all be realized- intake and exhaust paths exhaust emissions there and so on. Now we will disassemble and understand. Let’s see the picture for now. More precisely, the explosion scheme. That’s how it explodes. Here is a cylinder. Here is a rotating sleeve. There is a gear here. The gear transmits rotation to the crankshaft. Crankshaft through connecting rod makes reciprocating piston movements. That is, the sleeve rotates and at the same time, the piston reciprocates. This is unusual guys. Let’s see how it looks live. I haven’t yet taken it apart, I don’t know. We’ll take it apart now Then we collect and we will start. We’ll run in and watch how it works and we will measure traction. Started with the most difficult. I tried to remove this detail. He doesn’t want to go into any detail. Let’s try to remove at least something. I warmed her there was even a little pounding. It is not removed in any way. Remove the small carburetor. I don’t see the piston yet. In theory, the piston should be there and Now remove the cylinder. Many will have a question: “Why do such an engine?”. As I understand it, the main goal is make it very small very compact. That is, it is cubic in general the same as this one. Take a look. The difference is obvious. This one will still take up much more space. here the body is elongated and You can integrate it more compactly. For example, if you make copies of aircraft models, so that the engine doesn’t see it there, make some fake of the present, for example. Well and so on. Well, here it moves. Now I will mark. It’s marked here, in my opinion there is a strip. I usually do a couple of dashes (stripes), to know later what to combine with. Here so. Gently, that’s all. The next time I collect, I will understand how to merge it. Wow! Guys, look. It… Went to understand. This is how this thing looks. This is a piston. Before the first launch you need it is necessary to disassemble the engines (motors), who have long been idle. This is to clean all the channels. Sometimes there are small channels are clogged with dirt. But how to insert it back? You see that there is gear and you need to get exactly in the same place. I’m holding my hand here. I think I can put the marks again. This is a game, of course. It seems to be just everything. But it works extremely difficult. He put the labels to later at least roughly navigate, how to connect gears. Guys, you see the whole structure! Rotating cylinder. I think you have never seen such a thing. They didn’t even hear. The cylinder inside is extremely interesting. There is such a combustion chamber. There is a bevel and exit to the street. Outlet window. Where is the inlet window? The inlet should also be. It seems to understand how it all works. See, there is a recess inside. It is made like a combustion chamber. Only there is such a way out. This outlet either connects to the carburetor inlet window. Here the carburetor is screwed. Or it moves to the outlet window. That is, either or like that. Op and So. This way Four-stroke is implemented here. Impressive of course. Just a shock. Between the housing and the rotating the liner must supply oil. There is a small channel. There he is, out of the window. Well there a small hole is present. Actually, so it is lubricated. There is no backlash. I don’t know if this is good or bad. There still has to be a huge ball bearing. In the diagram – here is the bearing. Probably I won’t push this thing, so as not to harm. The gear is so huge. It transmits torque to the crankshaft. There he sits on two bearings. One closed so as not to miss anything. Alone he is open. But actually the piston itself. This engine is simple in design, that there’s even nothing much to show. I need to rinse it well now, grease with fresh oil collect and try to run, put on a stand. The motor is almost ready. I have the necessary fuel. But here, I see a lot of some kind of mud incomprehensible. Apparently, the motor was already in operation. A decent amount of dirt. Not in vain did I make out. Still, you need to do an audit of such units .. It’s nice that there is a ring. So the engine should have a decent resource. Another interesting point. Since there is gear then we immediately get the engine with the gearbox. The crankshaft rotates twice as fast than the sleeve with which all power is removed. Therefore, you can put quite large propellers. Assembled the motor. But what about the correctness gear arrangement not sure. Now we’ll put it right here and let’s try guys. Fine. Gloves must be worn for business. Wow compression. Gives outbreaks. Still put a small tank. It seems to give flashes. The key to the start. Attempt number two. Already a more serious attempt. It is necessary to pump fuel. It seems to work! Some kind of crazy sound. Some kind of very quiet. Maybe after all I messed up something. It could very well be. On one tooth could shift not there. One more attempt. Maybe a little throttle? Add a little bit. It starts. The sound is very quiet. I worry that after all, the motor was assembled incorrectly. How do you like an engine without valves, huh? It works, that’s the most interesting. I’ll put a smaller propeller. In general, this is its size from the minimum. That is 13 inches. He has either 13 or 16 inches, while about 5,000 rpm. It differs by step. Here the step is big, so 13 will be fine. With such a small propeller, of course, will spin much faster. It would be necessary to measure the momentum. Pasted a strip. Now I can use my laser tachometer. The laser must be aimed at the strip and then he won’t take two blades, and will only consider this one. What engines we have not started here, guys. Jet engine here was and all sorts of different small ones. I wear a special respirator. Hope this helps me. Just methanol is poison. A mixture of methanol and nitromethane is used here. Nitromethane is also a poison. We must somehow protect ourselves. The feature here is what one such turn the piston performs two reciprocating actions and the main compression we have all the time in one place. When we start other four-stroke engines, we start, we need to scroll two times. But here is the gearbox turns and he increases by 2 the whole thing. System… So. Well? It must be aired. There is a lot of smoke, of course. But it seems to work. About 4000 now in medium mode. At the maximum has not yet measured. Still have to him a little break in. Traction tests gave an unusual result. The fact is that he has the same craving – what’s with the little one that for example here with such a huge propeller. The difference is enormous. But apparently, due to the fact that he has a gearbox, he even copes with such propellers. 3 kilograms of traction shows what’s big, what’s small. I’ll demonstrate how it works with small and like with a big propeller. The thrust is the same, but the speed is different. Naturally, with a giant propeller, the revolutions are much lower. Well, for comparison. This is the minimum. With a large propeller, it is not particularly willing to accelerate. But thrust is issued about the same as with a small one. About 3 kilograms plus or minus. I will not show the settings. Here with that. Here it is clear. This is its size and it gives out everything. And here it is – not its size at all. This is the size of a much larger engine, which we will be testing soon too. And it will be serious and a gasoline 30 cc engine. Power must be insane. Who cares guys such video subscribe to the channel, like. See you all again. I feel that the gasoline engine will tear the stand in half!