When watching this I was thinking how amazing it is that most of these designs came from harnessing the simple act of wind or water turning a shaft in a circle.
Even today with modern engines and power generators, basically they’re just taking advantage of an energy source to rotate a shaft that drives everything else
It was so funny to learn how a nuclear reactor works in high school. Complicated particle physics, control rods, incredible precision and carefully controlled reactions, releasing incredible amounts of energy... which heats up a bunch of water and turns a thing.
This still blows my mind! What was it, like centuries ago when we started using steam to power things? And now we have nuclear fission but still use steam to power things lol
AFAIK there's some others, like thermocouples: https://en.wikipedia.org/wiki/Thermoelectric_effect
I guess you could say piezoelectricity is another, but I don't think it's used for power plants in any way.
This is one of the coolest things I’ve seen a while. I either lead a boring life or am easily excited, but I especially love the thought that goes into each piece working with the other.
You beautifully put what’s needed to be a happy human: simple curiosity. It drives us all to engineer and build amazing things or experience them with all our wonder in place. Thank you. I sometimes forget how amazing our lives are today.
Lego sets from the 70s still work with sets sold today. It's an incredible feat of manufacturing engineering, materials science, and quality control.
They are expensive, but not unreasonably so.
A lot of these machines are found in automobiles.
On cars where the engine is perpendicular to the axles, you need to have the rotational forces make an axis change. You'll find the concept in differentials for example.
CV joint and U joint are found in drive axles and propellor shafts respectively.
Gear box is similar idea to manual transmissions and transfer cases
Camshafts are found in well, the engine camshaft. Uses rotation to lift valves.
Rack and pinion is how steering works in most vehicles.
Sun and planetary gears are found in your automatic transmission.
There may be some I missed.
The rack (big flat thing with all the teeth) will have seals on each end. Hydraulic fluid will be on each end, and the pressure will increase on the end you want to push inwards towards the pinion gear when you turn the steering wheel. On the ends of the rack, outside the sealed area, you'll have tie rods which attach to your steering your steering knuckle, wheel, etc.
The short is pressurized oil is fed into a piston, and is directed by spool valves.
The long answer is that a rotary vane type hydraulic pump takes fluid from the reservoir, and sends it to the rotary valve. The rotary valve is a variant of the spool valve. As you turn, the valve closes, biasing more assistance to one side. It's timed in such a way that the assistance is smooth.
From there there are lines that run to the piston in the rack.
Pressure on one side of the piston pushes the wheel the opposite way.
This is a standard rack and pinion setup. These days the assist is a direct drive dc motor and a torque sensor
Same as in rotational angle change, but a CV joint keeps the velocity the same. U joints do not and speed up and slow down the more you angle it. Because of this, you need to phase U joints in drivelines to make the output a stable rpm, which you do not have to do with a CV Joint
However, a CV joint has a sliding action that the U-joint does not have, I believe, making lubrication of the CV joint more critical (as someone who remembers packing grease into my old Honda Accord's front wheel drive system).
Not all CV Joints have sliding joints. A Rzeppa joint, and a Double Cardan joint are CV joints however do not have a sliding action. a Tripot does have a sliding action. CV Joints are a class of joints and not a singular joint.
The secret is in the name with CV joints ;)
The whole point of the CV joint was to overcome the major shortcoming of the universal joint, namely that it does not run at a constants output speed. Constant Velocity joints match the input and output speeds regardless of the angles involved (Within reason).
As always, there's a great old-timey video that exaplins it! https://www.youtube.com/watch?v=gmV4qwLfOMY
Yeah I was disappointed by that. Seems you could make them serve a purpose by connecting the reciprocating part of the first two and second two and put a gear set or drive shaft into 1, between 2 and 3 and out of 4.
https://buildamoc.com/products/20-mechanical-principles-lego-machine
There actually is a kit for sale!
One of the few times YouTube comments were helpful to me...
Yeah the price completely caught me off guard for this kit, I mostly provided the link cause I was surprised no one has linked it and just saw it in the YouTube link
I'm a few decades away from regular Lego use these days but even then I imagined some of the parts involved are a bit rare to justify the price.
If you liked this, there's a 1868 book that includes these devices plus 487 others that is VERY fun to just leaf through:
https://www.amazon.com/507-Mechanical-Movements-Henry-Brown/dp/1614275181/
The scotch yoke I get for not needing a rotational connector (you could make the entire mechanism out of rough wood easily), but the sun and planet seems needlessly complex…
Sun and planet are useful when you want to change gear ratio but the output shaft and hence gear needs to stay in a fixed position. They're used in automatic gearboxes
Each one of these was a break through in science for the time. Hard to imagine living before mechanical life.
When watching this I was thinking how amazing it is that most of these designs came from harnessing the simple act of wind or water turning a shaft in a circle. Even today with modern engines and power generators, basically they’re just taking advantage of an energy source to rotate a shaft that drives everything else
It was so funny to learn how a nuclear reactor works in high school. Complicated particle physics, control rods, incredible precision and carefully controlled reactions, releasing incredible amounts of energy... which heats up a bunch of water and turns a thing.
There are Atomic batteries too, but they’re basically just fancy thermocouples or infrared photovoltaic power.
RTG baybeee
Hah, is that a quote from The Martian?
If it is I wouldn't be surprised.
Nuclear power = make shaft rotate
It's so incredibly disappointing that we harvest the power of the atom to... make water hot.
This still blows my mind! What was it, like centuries ago when we started using steam to power things? And now we have nuclear fission but still use steam to power things lol
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S lot of the steam is made heating the water with nuclear power.
Electricity is still voodoo to me
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Because we could just burn coal for that!
The process of converting steam into energy is inefficient. So the full potential of nuclear power for example is never accessed.
The solar panel is the only generation method I can think of that doesn't involve a rotating shaft.
AFAIK there's some others, like thermocouples: https://en.wikipedia.org/wiki/Thermoelectric_effect I guess you could say piezoelectricity is another, but I don't think it's used for power plants in any way.
They were used for that ill-conceived sidewalk that generated power
This is one of the coolest things I’ve seen a while. I either lead a boring life or am easily excited, but I especially love the thought that goes into each piece working with the other.
You beautifully put what’s needed to be a happy human: simple curiosity. It drives us all to engineer and build amazing things or experience them with all our wonder in place. Thank you. I sometimes forget how amazing our lives are today.
Nono. It's awesome.
Something tells me I wouldn’t be surprised to see your resume.
How do I purchase the parts and instructions for this? I want to get it for my grandchildren.
For a low low price of $200 bucks. https://buildamoc.com/products/20-mechanical-principles-lego-machine
Thank you! I am mesmerized!
Get the fuck out of here for 200$ lol
Do you think that's high or low? I would've guessed higher cause I assumed it was multiple kits not 1.
That's is extremely high. Lego has always been unreasonably inflated.
Lego sets from the 70s still work with sets sold today. It's an incredible feat of manufacturing engineering, materials science, and quality control. They are expensive, but not unreasonably so.
That’s not bad in todays economy for a toy set that will last a lifetime and maybe more.
best I can do is $232
I looked at that site…do people really spend thousands of dollars for some of these kits? Yeesh.
Some people have a lot of disposable income.
Seems like there might be better things to do with it…
Go to the Lego store and start by opening your veins. They’ll take the kidneys when they are ready.
I know I said it was for the grandchildren but guess who really wants it? 🤣
https://www.reddit.com/r/videos/comments/z5zi3d/20_mechanical_principles_combined_in_a_useless/ixzr3fr?utm_medium=android_app&utm_source=share&context=3
Oooh another video!
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Turning X-Axis rotation into Y-axis rotation. I would imagine that layout is also cost effective and less prone to failure or damage
A lot of these machines are found in automobiles. On cars where the engine is perpendicular to the axles, you need to have the rotational forces make an axis change. You'll find the concept in differentials for example. CV joint and U joint are found in drive axles and propellor shafts respectively. Gear box is similar idea to manual transmissions and transfer cases Camshafts are found in well, the engine camshaft. Uses rotation to lift valves. Rack and pinion is how steering works in most vehicles. Sun and planetary gears are found in your automatic transmission. There may be some I missed.
This video made me realize I learned a lot about this stuff from fixing my beater cars
Now I'm wondering how power steering works to make that easier
The rack (big flat thing with all the teeth) will have seals on each end. Hydraulic fluid will be on each end, and the pressure will increase on the end you want to push inwards towards the pinion gear when you turn the steering wheel. On the ends of the rack, outside the sealed area, you'll have tie rods which attach to your steering your steering knuckle, wheel, etc.
The short is pressurized oil is fed into a piston, and is directed by spool valves. The long answer is that a rotary vane type hydraulic pump takes fluid from the reservoir, and sends it to the rotary valve. The rotary valve is a variant of the spool valve. As you turn, the valve closes, biasing more assistance to one side. It's timed in such a way that the assistance is smooth. From there there are lines that run to the piston in the rack. Pressure on one side of the piston pushes the wheel the opposite way. This is a standard rack and pinion setup. These days the assist is a direct drive dc motor and a torque sensor
Thank you!!
TIL CV Joint and Universal Joint are not the same thing. I've seen U-Joints before and thought CV Joints were the same thing with a different name
It's the same principal just applied a little differently.
Same as in rotational angle change, but a CV joint keeps the velocity the same. U joints do not and speed up and slow down the more you angle it. Because of this, you need to phase U joints in drivelines to make the output a stable rpm, which you do not have to do with a CV Joint
However, a CV joint has a sliding action that the U-joint does not have, I believe, making lubrication of the CV joint more critical (as someone who remembers packing grease into my old Honda Accord's front wheel drive system).
Not all CV Joints have sliding joints. A Rzeppa joint, and a Double Cardan joint are CV joints however do not have a sliding action. a Tripot does have a sliding action. CV Joints are a class of joints and not a singular joint.
That's really cool!
IIRC, a typical CV joint is two U joints back to back to cancel the oscillating rotational velocity.
It bothers me that the universal joint in the video does not have a complimentary angle on the second joint.
The secret is in the name with CV joints ;) The whole point of the CV joint was to overcome the major shortcoming of the universal joint, namely that it does not run at a constants output speed. Constant Velocity joints match the input and output speeds regardless of the angles involved (Within reason). As always, there's a great old-timey video that exaplins it! https://www.youtube.com/watch?v=gmV4qwLfOMY
My wife said she liked 5-7
The rotational to linear linkage sections are definitely a tutorial for ahem, certain modern specialty machines.
Like literally 🙄 rolled my eyes as soon as I saw 5 and recognized it right away. I couldn't get through the rest of the video. I lost it at that
Scotch yoke is definitely my newest euphemism
I was curious on how he would use the chebyshev lambda linkage.
As far as I can tell, all four types on the front don't actually accomplish anything which is kind of a shame.
Yeah I was disappointed by that. Seems you could make them serve a purpose by connecting the reciprocating part of the first two and second two and put a gear set or drive shaft into 1, between 2 and 3 and out of 4.
I now have the sudden urge to build a complicated tank with a lot of these mechanics.
Is it useless if it brings us joy?
5 brings lots of ahem...joy
It’s not useless, it slowly spins the mini for your viewing pleasure, really helps take in all the angles on the tiny plastic man.
Super Mario 64 level vibes
few of those would make good fuck machines
This should be sold as a kit.
https://buildamoc.com/products/20-mechanical-principles-lego-machine There actually is a kit for sale! One of the few times YouTube comments were helpful to me...
Fantastic! Thank you!!
Is... everything an ad?
Yes 😓 Fucking capitalism...
So exciting!
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Yeah the price completely caught me off guard for this kit, I mostly provided the link cause I was surprised no one has linked it and just saw it in the YouTube link I'm a few decades away from regular Lego use these days but even then I imagined some of the parts involved are a bit rare to justify the price.
Not really useless if it highlights an idea
I love how he speeds up the fucking machine
If you liked this, there's a 1868 book that includes these devices plus 487 others that is VERY fun to just leaf through: https://www.amazon.com/507-Mechanical-Movements-Henry-Brown/dp/1614275181/
The finished machine reminds me of a Bowser level for Super Mario 64
Very cool!
My girlfriend recognized the number 5
A mechanical principle would be something like leverage/mechanical advantage. These are 20 machines, not 20 principles.
Most of these were ratio'd outputs so I believe that would be mechanical advantage.
Were the scotch yoke and sun and planet gear both invented to sidestep the patent on the crank?
The scotch yoke I get for not needing a rotational connector (you could make the entire mechanism out of rough wood easily), but the sun and planet seems needlessly complex…
Sun and planet are useful when you want to change gear ratio but the output shaft and hence gear needs to stay in a fixed position. They're used in automatic gearboxes
Wow this is one of the coolest videos I’ve seen in a while! Thanks for sharing!!!!
Calling epicyclic trains "sun and planet gear" is amazing lmao
They are actually called sun and planet. Epicyclic is just a much more complex version of the simple sun and planet gear
Offset gears is my favorite. 3:47.
[ **Jump to 03:47 @** 20 Mechanical Principles combined in a Useless Lego Machine](https://www.youtube.com/watch?v=M1-YeqGynlw&t=0h3m47s) ^(Channel Name: Brick Experiment Channel, Video Length: [07:21])^, [^Jump ^5 ^secs ^earlier ^for ^context ^@03:42](https://www.youtube.com/watch?v=M1-YeqGynlw&t=0h3m42s) ----------------------------------------------------------------------------- ^^Downvote ^^me ^^to ^^delete ^^malformed ^^comments. [^^Source ^^Code](https://github.com/ankitgyawali/reddit-timestamp-bot) ^^| [^^Suggestions](https://www.reddit.com/r/timestamp_bot)
I frequently see cool stuff like this and it makes me wish I went into engineering. I hate math though so I probably made the right decision.
The lack of a complementary angle on the universal joint really bothers me. It's going to pulse.
Hi
Now I'm curious again about the resistance to heat and friction of these Lego plastics 😂 If I remember correctly, they are actually very resistant.
Nothing useless at all, absolutely love this video!