Comments by "EarthSurferUSA" (@EarthSurferUSA) on "Engineering Explained" channel.

When you add the effects of compression and rebound dampening (oil damper), this gets much more complicated than just a spring with no damper. In fact, a spring alone does a terrible job of keeping the wheel on the ground. Playing with dirt bike suspension in the good old days of Motocross (using about 12" of travel), I found I actually got a plusher ride with a stiffer spring (front forks, and very little preload on the springs), that still resisted big bumps with less compression dampening, and more rebound dampening (assuming the dampers were set correctly with the stock springs). As for the preloaded travel of a dirt bike, you pretty much want your suspension to have eaten up about 33% of the total travel with you on the bike, no matter what your spring rates are, and that is adjusted by a preload ring that compresses the spring. But, if you add the dampening,--I bet the math work goes up exponentially---but it still has to work as well in the real world, and will need field testing to fix. Sophisticated suspension, (depending on the demands and severity of the application), seems to be one of those things that almost never comes off the drawing table very well. You should look at some of the front forks of MX bikes today. Nobody knows how to adjust them, there are so many knobs and air chambers. But one fork on Yamaha the kabaya (sp) SSS forks, that is over 10 yer old technology, and still uses a spring, romps them all in overall performance and probably every category. You post great stuff young man. I hope there are more like you.
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+BlackyTMU With a "straight rate" spring, the force per distance (rate) is additive for each unit of distance. If you have a straight rate spring that is 20 LBS per inch, it will take 40 lbs for 2 inches, and 60 lbs for 3 inches, etc. For a progressive rate spring, the rate usually starts off soft but requires more force per unit of distance traveled. Personally, I like straight rate springs better. Yes, I would rather be straight, than progressive.
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I build small 2-stroke engines for a living, (with a lot of machining experience and a coupe of engineering degrees),, so when I see a young guy today getting technical, there is usually not a lot of knowledge involved, replaced by speculation and poor tribal knowledge. You give mankind hope young man. It was a pleasure to hear a young person today, talk about something they have actual knowledge of. "The more advanced a free society is, the more the citizenry has to be able to think." (Ayn Rand). Let me guess, you did not learn this stuff in today's school system. Education today, is an individual effort. Keep doing what you are doing. :)
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And the garage and attached home in the middle of the night when your family is sleeping.
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I don't like the way so much cylinder wall (not the combustion chamber as explained) is exposed to the combustion. If carbon builds up, and comes off---you may trash that piston, cylinder or valves. The over bore may not be a option with this engine (as explained).
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From what little research I did, nitrogen actually has about the same thermal expansion rate as air, with more variance happening because of humidity in the air. Interesting valve operation though; must be a lot of cylinder wall (for the valve) stiction (I would think) that would be nice to eliminate. Your a sharp young man, keep up the good work. Most people don't realize our minds are like our bodies, the more we work it out, the better and stronger the mind gets also. I learned it in college; something I was never taught. So what do we do? We decide to stop learning things the day after some graduation. Never make a decision to stop learning things, and this is the reason why. The more advanced a free society is---the more the citizenry has to be able to think (or we start voting for socialism---or worse). Now human beings are the only living entity on Earth that can pass on information from generation to generation,---so listen up! :) It is a breath of fresh air, to see a young man who may be on his way to greatness. I hope you have a lot of like minded friends. :) Be Great!!! Be John Galt!
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+Engineering Explained For a very stiff spring, yes, but what about a very soft spring? Now the spring is under control of the dampening (compression and rebound dampening), to help the tire follow the road. But, for a hypothetical example, if the spring rate is soft (or not hard enough to rebound quickly), over stutter bumps, the shock could actually "pack" up into it's travel, because the next bump and next bump and the next bump compressed the shock more, and more, and more, until the spring rate is in a stiffer range of motion or the suspension bottoms out. When that happens, it could act a lot like a overly stiff spring, forcing the chassis upwards. Selecting the correct spring rate for your application is probably more important than getting the dampening dialed in, but they have to work together, and it is usually futile to try to tinker with dampening if you have the wrong spring rate. I learned something during the dirt bike suspension evolution from about 3" of travel to about 12" of travel. It was not always the longer travel that made a suspension perform better, but how well the spring and dampening handle the travel you have.
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You don't understand. The plan very well may be to kill the gas engine, so we all have to move to the control of a city. You are under the impression that sustaining our way of life and our modern comforts is a given. It is not, and it is not intended. There is nothing to replace "fossil fuels" on a large scale, and they know that. communism does not care if your points are valid. You don't understand what we are dealing with. You are a rational engineer, (as am I), they are not.
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Quote from a guy I worked with 30 years ago. "The day you think you know it all, is the day you got a lot to learn." THINK!!, and never stop learning productive things. Mankind's future depends on it.
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Yep, that is how it is pushed, as if we all agree, then "move forward". He acts like he "got the memo" and knows it is true? (or educated just right to know what to do) I wonder how much YT pays him? communism does pay well ya know, until there is no more free enterprise to steal from.
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Think about how much energy it is going to take to charge as many batteries as we have gas cars, and we are destroying our coal fire plants that provide 50% of our energy---with out 300,000,000 car batteries. Now get ready to ride a bicycle and walk.
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It also boosted octane.
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If you fix a problem, don't you expect it to work better? The only problem with the car in the USA, (according to marx, your teachers, sorry), is that is peasant citizens made money and profit with them. commies hate profit,---but only when we make it son. You will figure it out,----------------------eventually. Your entire generation, (worse than mine), better understand that education can only stat after graduation today. You should sue. Redefine "class action law suit", and sue for destroying your minds. You kids were figuring out reality better when you were learning to talk at the age of 2. Sue sue sue!!!! It's way past due.
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Out of the 4 categories, take out the "environmental" punishment, (that does not mean be dirty), and the "cost" drops 50% in 3 years. I will skip on the science and the consumer categories because neither of those are a consideration when it comes to pushing electric cars as a replacement, (which is what you are condoning actually, by just entertaining the movement.).
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Yes there is, but oil production is being lowered to make gas more expensive, which make electric cars competitive enough to buy. But the competition is for the highest price ya see.
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Mackinaw Michigan, (no gas engine allowed, tourist area). City building and hotels are banning EV's from parking in the building/garage because of risk of fires that have happens from battery failures. Could be your home at night, that happens too. This is going to be a fun experience.
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They are making small utility gas engines illegal in CA. right now. Are you sure about that?
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I was going to tear you apart, but you do make some valid points and have put a lot of thought into what you said. I have to respect that. But you are wrong,-when you turn green for energy, (and I 'see being reliant on hydrocarbons as a problem at all, (I will refrain from the progressive terms "fossil fuel" and a new one to me, "Artificial fuel". The designer of that last one must have dreams of eating burritos to produce gas to power a bicycle that runs on the methane combustion,-- Oh, shoot, he won't burn his own "natural fuel" either. Damn it. :) Now, if we want to "sustain" or even grow our lifestyles, I suggest we study the actual "dollar/power" (total cost per power generated) between all the power sources available, and I think you will find the only power sources that compete with the hydrocarbon in Nuclear. But, if sustaining our way of life and comfort is not a concern, if our decline is not a concern--then by all means, (and all will be used),---save the planet.
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Be careful of the indoctrination word "sustainable", because it does not mean "growth". (do you want to grow?) Sure, higher RPM's will mean more wear and tear, but with "growth" we can figure out how to make it work for their application, (tougher materials, better lubrication, etc. etc,--thinking). We are thinking man, and we can do anything that is possible, but only if we believe in "growth". "sustainability" in reality, is actually a pretty dirty word, if you have any intention on growing. Consider it sabotage, as that is want the word represents in the context of mans "growth". I would love to see you young guys sue your teachers,---collectively.
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Believe me,---the "lobby" gets nothing the government does not want to give them. It was not the farmers who pushed ethanol. It is the commie/environmentalists in Washington. There is nothing "free market" about farming son. They do what they are told. Look at you. You were taught to blame the free market, even when it does not exist. Yes sir---marx did that.
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If it worked better,--why has nobody made it work in a free enterprise system like we had? It is a very important question, because I am old and you will have to do what your told,--and be happy in poverty. I don't have time to explain. Just told you the results of your thinking. communism is very tricky.
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You are still lost,---my son.
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How would the oil companies, or any other industry, make it so other people can not compete with a new idea. You have the idea that is is all the companies fault, but if they did not get favors from our government, they would have to compete with the new idea. That is called economic fascism, and the "Tucker" automobile got destroyed by it in 48-49 after WW2. (Buy that 1988 movie, "Tucker", it is really good,but BS at eh end. It shows how government destroyed Tucker. It is true the auto companies did not want to compete, (The "Tucker" was a good, fast, durable, and safest car of it's time. 50 were made), but they would have had to if we had a true free market instead of the economic fascism that keeps you and I from the fun of competition.
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Be careful. You may have a valid point as far as loss of energy of a drive system, but I think you will figure out more reality when you realize that we used to do so much better economically and civil. There is a lot of reality outside of your energy loss point, that you do not understand yet,---or you would not waste your mind on that point.
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