Friends, hello everyone! I look, you really liked the video from BMW. Therefore, today there will be a continuation. We will swap the motor again. He took off this small engine. Who cares to see how real big sedan car rides with such a small engine of 3.5 cubic centimeters in volume, link in the description below the video. Well, today we will change this engine to bigger engine. This is an electric motor. The electric motor is not the one that is 15 kilowatts and which you often saw in my videos. This electric motor is even more powerful. The electric motor is smaller, but he, as far as my memory serves me, by 25 kilowatts. Here is such a bk motor beast. I think electric traders will love this. Look at these wires and you will immediately understand everything. Why is he so powerful? Because it has very high speeds! The turnover is about 25,000. How much again my memory serves me. We will check the speed, we will install instead on this gearbox. But the gearbox needs to be improved. Because even 40 thousand revolutions was not enough for to beha (BMW) quickly went. We will throw out almost all the gears. I disassemble, removed the engine. The engine is still quite in working condition. Even the gear did not wear out. Worked almost without lubrication. Combat engine. Now I’ll remove this cover and we will think which gear is best to hook onto. Because always somehow slowly beha goes. I would like it faster. I always play it safe and I make a more traction mechanism. I would like to be faster. Maybe now we let's do it right: put on the nearest gear and then beha must go. Either he will not go at all, or he will go fast. Comes back easily and pulled out very hard. Here it is. Such a luxurious gearbox. Our task is not simple: to decide which gear will be used for the drive. I will make a clutch. In principle, this gear is suitable for the clutch and here is the question: attach to this or this one? By the logic of things since BMW initially has about 6,000 rpm on a conventional engine then we essentially need to connect here to this gear. 3 times the speed will decrease. Let's say with 20 thousand to six and a half and in general, it will be the same. But then we may not develop that torque, so BMW easily started off and rode. Therefore, a dilemma. And if you connect here then 100% beha will accelerate. But what speed will the car have? Let’s roughly calculate. Let's mark it like this. Not very visible. But there are no other options. And start to turn the momentum. This gear. How many times will it reduce? 1 2 9 10 It reduces 10 times. That is, 20,000 revolutions with us will turn into two thousand real on a BMW. This is not enough, of course. It will be the same with a turbo starter. Up to 70 kilometers per hour beha will accelerate. What to do? But then 100% will accelerate. No guys, let's take a chance and put it here - check what we have here. Time, two, three... 3.5, and even less than 3. 2.8 approximately. That is, it turns out real 20,000 rpm decrease by 2.8. It will turn out 7000-7500 on a beh. And this is a bit much already. Of course, we will not go 180 km / h? It just won't develop an effort. We’ll take risks, put it here. We remove this gear. Here is our gear. Here she is. Through it, torque will be transmitted to the behu. And the motor through the clutch will be directly here to attach. The shaft is thin. It is necessary to do something transitional. If you spend it qualitatively, then you can do it like that. And here somewhere you need to fix it with a bolt. Therefore, it will not work. We make the adapter plate and adapter sleeve. OK? OK! Here's a cool thing to be! I already see what kind of game it will be! And these gears, friends, I will keep. The gearbox is very good, as you can see. And you can use it anywhere. Put the gear on the machine and I achieve an hourly indicator of minimal heartbeat. At the moment the beating is one hundredth. Maybe one and a half. I think that is enough. Because on the bearing itself, it has already developed under. The heartbeat is even bigger. That is, there are already decent gaps. But the thing is not new. We will stop at this and I will bore the place where in the end I will mount the shaft. The shaft will go through the gear. In the beginning he will hang out a bit, have a degree of freedom. And in the end it will be rigidly fixed. That is, there will be a kind of spring with a small degree of freedom, so that there are no axial loads in the motor area. The shaft will bend a little. Something like that I was planning. So they do in aviation on starters to start large engines. Lots of where, I hope. The solution is quite standard. Write in the comments, friends, maybe it’s worth it to achieve better, so to speak, positioning and quality. Maybe weaving - this is nonsense? Maybe you need microns? I'll start with the drill. The detail is red-hot. It should be quiet. And then I squander it clean. I will not greatly thin the body of the part. I’ll dwell on that diameter, I’ll just do it a little bit. The drill is going hard. Hardened. After drilling, I bore with a cutter. I bore it one way, then the other. Because the cutter depresses a little seen due to the fact that the knee. And he does not immediately take it to the full depth. And since I need to do exactly I’m already a little boring at the end, I use the caliber. Picked up a rod for 16 millimeters. That is, I use it as a caliber. It is polished, very accurate, red-hot. Then when I will sharpen the shaft, I will be guided by it. Measure it and the shaft, to be the same and to have an idea, how does he get in there. After drilling, I checked whether gear position has shifted. I don’t know if such a turner tells you, bloggers and others. But even just from standing from the fact that it is in tension, clamped. I leveled it turns out, to get into a hundred, then clamped with one fist, then with another. I tried back and forth and set it up. But from long standing, it can shift a little, because tension is present in the cams and displacement may occur. It happened many times with me on large cartridges and on this little one. Therefore, you need to double-check if you want to achieve accuracy. Here, I tell you, friends, such subtleties. So the gear seemed to work out pretty well. Everything is coaxial, all in caliber. Even just in case, he did a bevel. Suddenly I want to weld on the back. I haven’t thought about it yet. What if suddenly such an idea visits and need such a need. Okay. The next step is to set the hexagons. I will sharpen the shaft from it. I will do it in one installation. I will drill a hole I will bore it under the electric motor. Here on the back end the diameter will be made very accurate, to just fit. For this, I bother with that caliber. Well, now the tasks- lightly peel the bar. I’ll leave some of the face so that you can conveniently cut the thread. For to the electric motor there instead of a dowel there is a flatter, must be bolted. On a long reach, of course, it will not work out much. I’ll even slightly reduce it exactly to the size. And then I’ll put it forward to trim. Because I immediately set aside space so that you can cut it off. Sometimes when there are long passages I practice scary things. At the same time there is a passage with me and for example, drill a hole, to save time. This is how the process goes. See? And groove and drilling at the same time. You can even shoot a separate video on this topic. On the topic that this is possible at all. No one usually thinks that you can do such a game. I do. It seems that the shaft turned out. The bar was without much internal stress. Although it often happens, that when you do a big metal eat, exaggerate source bar or some rod, then internal stress is very affected. And here at the end the shaft begins to beat. It is because of this that I am doing from a single installation without a backup the tailstock of a lathe. That is, to adjust and see, if the beating at the end went after thinning, here I am here moonlighting with a cutter. That is, I leave a reserve for finishing. Well, it’s not in vain that you must first rip off, and then finish clean. Everything has been invented for a long time. In general, I cut the shaft and We will try to assemble our super design, super electro behu tesla. Put the shaft on the engine and you can test a little bit, how does it work, is there vibration, is there a beat. Note that the heartbeat is absent absolutely. But there is a vibration. Where do you think the vibration came from? You see, the engine is buzzing and driving. The vibration came from this screw, which I twisted to lock. Put him on loctite just in case. It is necessary to balance somehow. I’ll try to remove the metal here a little. Or you need to cut off the hat. But how then to remove this shaft? Unknown There is no way to do without turning. It seems to have already begun to make the adapter plate, to connect the engine to the gearbox. But it turned out that the bolt clings to the wall in this place. Have to get out a lot and squander this business a little. The process is slowly going on. I’ll lose about half an hour on this. Without turning I don’t know how to solve this issue That's actually what happened. We have a pocket and we have a channel. Everything seems to be normal now. Oh, these engineering matters! All the time there are some surprises. Amazing things are happening. Almost on the eye (approximately) I drilled all these holes here. More precisely, use the template, my favorite way. I made an imprint, manually wrapped and manually drilled. See what happens. Each hole I didn’t even do half a millimeter more, each hole fits perfectly. This has never happened, even when I did it on machines. This is very strange in fact. See, there are no gaps between the bolt and hole plate. Wow! The question is, which is better: on a machine tool or manually? Just on the machines even when we drill on a drilling machine, removes the drill in 90% of cases leads away somewhere. Yes, even how to drill. If you drill it, it can still lead away. But this is my first result, so that it turns out so high quality. Now I can show you how it is going. Take a look. I spied such a mounting system in aviation. What is she like? Insert our plate here. Insert the gear. As you can see, there are two holes. More precisely, there is one hole, there are two holes. They are inserted like this. He put the tags because he drilled in one installation. And here we throw the pin. Done. Our gear pretty well fixed. Of course, there would be a larger diameter, it would be better. But here the engine is revving and doesn't have that much torque to rip it all off. Now you can collect this "sandwich". From falling out the pin will be fixed inner ring of ball bearing. We can say that the thing is ready. That's what happened, friends. This is a whole power plant. I’ll be modifying a little bit more. But in general - everything is in order, everything is ready. I even hooked a piece of paper to measure the output speed. I’ll use just such a tip. But he, of course, cannot do anything he can this engine, because there are only twenty-five volts. And the engine, as far as my memory serves me, far beyond 50 volts it works. But nonetheless. Now we can check and understand something, what turns out turns and how it works. Let's get started! Let's hear this brutal sound! Of course, he is gaining momentum tough. Hard technology, I think, will be. Let’s measure the momentum. What will they show us? Now it turns out 720. And if you give everything? It turns out 4,500 rpm. Too much. I would like less. Perhaps I didn’t bet on the wrong gear. Friends, I think in first- second gears it will be possible to work on seven thousand. Because if I give here 50 volts, in theory, it will already spin up to 7000. Right? Here there is still some stretch. Turnovers will fall and so on. See what mess I'm working in. In another way, it doesn’t work out in any way. Because a lot of garbage is produced and it takes a lot of tool. I keep cleaning endlessly, that is, in a day I’m probably a hundred movements I do extra to get out. But all this does not help. You can already start cleaning. Who is interested to see what will happen next and how BMW will go with this engine subscribe to the channel, friends. Support like. Bye everyone, see you soon! A fierce car will be, I feel! Already a frost on the skin takes!
