good one

steam locomotives were external combustion ;)

@@mikoajp.5890 then why was it an enclosed area where the fire was HUH??? Sounds like an internal combustion… Since some of you guys dont have more than a 5th grade reading level, i need to specify this is a joke.

@@john_doe668it's still external to source of work, that is to cylinders powered by steam

@@mikoajp.5890 woosh

@TeodoraTacderenfake

That is not how efficiency is calculated, heat is unwanted. By your logic everything is 100% efficient.

@@jklmnpqrstIt's clearly a joke

@@jklmnpqrst By everyone elses logic, you missed the joke.

@@jklmnpqrstWhat are you gonna do? Stop me from wanting heat? Im about to increase entropy here im the real villain and you cant stop it!

also his ozempic face is funy

Cool

I have an extreme urge on what to reply here but that would just be (probably) like begging

That makes sense. If you short circuit the two wires of a DC motor the rotor becomes harder to spin, you can even use it to test if two parts of a circuit are isolated from one another or not

The locomotives you see pulling trains use this to slow down without using the air brakes. There Is a large electrical resistance grid on the roof for what the railroad industry calls "dynamic braking".

You re both tom and the jury?

ohh

putting a knot in that thing sounds harder than just soldering it, but ill keep that in mind

Flame it with just a lighter or something more aggressive like a blowtorch?

@@willpreston7797A match flame will easily burn away the insulation. It doesn't need to be high temperature.

@@willpreston7797 Even with just a lighter you need to be careful to not instantly melt away the copper :D

Quit commenting on other videos. You need to continue making unimpressive pieces of foam fly.

@@joelspangler Not nice :(

@@lookawilduser I was trying to reference Nick's video "Taming the Tail-Sitter: Hover to Forward Flight Explained". This video is one of my favorite youtube videos, and I've watched it at least 15 times. At the time stamp of 9 minutes and 52 seconds, he refers to the tailsitter project as a "rather unimpressive piece of foam". I'd sure love to see more unimpressive pieces of foam... I wish I could be brave enough to try to build one of my own.

@@joelspangler it’s still not nice to tell someone else what to do or not on their free time

@@joelspangler mb

Iam going to be an engineer soon and I like the videos as well 👆

Cool! Enjoyed it too

Will you be an engineer soon, or a retired engineer? Big difference haha 🌈 ​@@bauerm12

Almost jaw-dropping.

Funny seeing you here!

I instantly hear their sound now

rubber band around axle car... pull balll on ground and let go lol wooosh...... lol

I was thinking that too. I don't know if there's any capacitance in the Peltier pad but if there isn't, I would think a capacitor would help.

@@SqueakyNeb There definitely will be some parasitic capacitance in the TEC but it will be very small compared to the electrolytic capacitor.

I have little experience with electronics/electrics and no experience with Peltier stuff, so I'm probably talking out of my ass here and feel free to correct me if I am, but I think this might not matter too much? The pad generates voltage via temperature differential between the sides, but if you're not drawing any current, surely it doesn't transfer the heat as easily as when current is being drawn, right? If so, when the switch is closed the pad generates a higher voltage due to the higher temperature difference, and you get practically the same effect because the temperature differential is acting as a capacitor anyway, isn't it? The way I'm thinking about it is best described as an electric version of a Stirling engine where you intermittently stop the flywheel (between coil pulses) which lets the heat build up which then makes it spin faster. At higher speeds where the air rushing by and cooling the pad is more of an issue I can see the sense in adding a capacitor, but again, assuming the stuff I said is accurate, a capacitor would just be another component for energy loss in the system. If I am wrong please do correct me, I'd love to learn more about this stuff.

​@@PromptedHawk Ahh I really want to know the answer to this now. I think theoretically you're all correct. However, my suspicion is that the heat capacitance of the TEC won't be able to respond very quickly compared with the frequency of the motor. Therefore an electrical capacitor will be more efficient at harnessing the energy between pulses and would provide a measurable improvement.

would it be useful to place another peltier plate upside down on the first one, and power it when the reed switch is open, in order to keep the ice a bit cooler for longer?

What notes, this technology is in practice since 1960s. It is used in toy cars for children, when they pull it back, the capacitor pushes the car forwards more than the actual pull.

​@@KaavjeSahe-- Are those electrical capacitors, or mechanical springs with bi-directional gearing?

​@@KaavjeSahe I didn't know those wind-up cars used capacitors. I figured it was mechanical.

​@@CosmicFlux Some use Flaps, while some use capitcitors. Expensive ones use capacitors and the cheap ones use flaps. As a single capitor cost 13 Euros, cheap toy cars usually have a flap to move them forward.

@@KaavjeSahe a single capacitor cost like 42 cents, actually it's probably much lower if you buy from the right place (as a factory would)

I work in a manufacturing facility and our Reed switches are covered in plastic and sealed, so this is the first time I had seen how they actually work instead of just knowing it wasn't working, so replace it.... Now I'm confused as to how the heck they break. Maybe bent back and forth through enough cycles until it broke? Or stuck fused together for some reason? Wondering if I just smack one hard against my leg if it will start working again? Probably go through 2-5 a week across all machines

I really like the design

A hand cranked motortricycle? Surely legs would work be- Oh. That's just a trike.

It looks like a Big Wheel or a Green Machine like kids had in the 70s and 80s.

Exactly what I saw with the Peltier device experiment.... While the motor draws current, the Peltier device will have only so much energy stored within itself in between the motor pulses... A capacitor definitely makes sense in this application.... Two Peltier devices in series should provide a higher voltage which sent to a capacitor and fed to the motor via a Stepdown DC to DC converter to control the motor speed, should be able to achieve longer run times....

@@PeterMilanovski A linear regulator would be too inefficient, I think. Maybe a custom switch-mode power supply, with the frequency tuned to the frequency of the motor pulses at your desired speed. At that point you could probably even remove the reed switch, because what you've made is essentially a BLDC motor.

@@tissuepaper9962 exactly.... Linear regulators are good at what they do but the goal here is efficiency so a switching low dropout regulator is what's needed... I idea is you to remove as much load from the generator so by going with a high voltage low current generator, you are removing some of the load from it and then use a DC to DC Stepdown converter to do the heavy lifting to provide the low voltage high current that the drive motor needs...

All it needed was some leather and chrome, LOL

Check out lasersaber's videos. He has motors that run on milliwatts of energy. Powered by tritium lights, ionic atmospheric energy, ambient temperature change...

The electric trike Tony from Agingwheels made a video on might be up your valley then. It is just insanely efficient. Just don't confuse it for the one with pedals he also made a video on...

@@markellii3093 Robert not Tony.

It's not very efficient, it's just using very little energy.

Bro who runs this account

​@@CheesyballzTMfr

you could have just used a yellow hand

the youtube comments are legendary

Go. Away.

randos when any youtuber makes anything: "turn it into a whole company bro"

it is already what everyone is doing in the energy industry

And needs copper. Less then ideal, especially if you can substitute it for more traditional design that can work with only few springs and everything else is plastic.

Looks like he used the AI track feature in Davinci Resolve (or something akin to it)

@@Axodus i see the perspective shifting now, like he walked and handheld it, i thought he had a cineslider..

@@MarkFonts It's gotten pretty good at faking professional camera rigs on the fly, it's pretty great tech for lone editors and it works in seconds.

I was thinking you could use the bobbin winder feature on most sewing machines.

​@@ADBBuildtotally, but all electric sewing machines I've messed with were too nasty and rude to wind a delicate wire like that with confidence i think

​@crackedemerald4930 stand alone hand winders are still kicking around

@@ADBBuild you mind wonna actually count the windings.

I doubt it will keep going if he brakes though! ;)

I think he already made a capacitor bike

As pointed in the video, it would go for a bit, while you are resting, but this energy doesn't come from nowhere. You would feel more resistance when cycling. In the end you would be more tired to drive the same distance, as some energy would be lost as heat. Also I believe he did "supercapacitor bike"

Break

If it's less efficient than a flywheel then it won't really work since he already showed that flywheel bikes are impractical

"the energy is stored as pressure differential on each side of the propeller" -- Would you describe a piston-engine driven airplane the same way? For a piston-engine driven airplane, I would say the energy is stored in the fuel.The small pressure difference from one side of the propeller to the other stores a trivial amount of energy. Shut the engine off and pressure difference (AKA thrust) disappears very quickly. The same is true for a downwind-faster-than-the-wind cart. The propeller requires a continuous input of power to produce thrust. This power comes from the wheels that are in contact with the ground.

@@andrewsnow7386 Yes the amount of stored energy is very small. See my last video where two propellers of about 0.1m^2 swept area moving air at 3.2m/s have less than 2 Joules of stored energy. I demonstrated in my video exactly why that sort of vehicle can exceed wind speed and why that is just temporary proportional with the amount of stored energy.

@@andrewsnow7386Also, check out autorotation aircrafts. Some experimental models employ the same principle. They still get engines, others are part glider part autorotation, but the principle electrodacus said is better employed on those.

​@@electrodacus I watched your video twice, and it's not clear to me what you are trying to demonstrate. You end with the conclusion: "It's clearly not powered by wind power when above wind speed." We need to parse this before I can say if we agree. Are you saying that the difference in motion between your treadmill and the air is not powering your cart? Or are you saying that your experiment has no wind (that is the air is static in the room) and since the wind speed is zero, it can't be powering anything? I'm fairly sure you are claiming the first, in which case your own experiment proves you wrong. Consider 2:20 in the video. Using the reference frame of the belt on the treadmill, the cart is moving forward at 5.33 m/s when you are restraining it with a force of Fnet using your hand. Since the cart can travel at 5.33 m/s and still have a positive Fnet, it must have a speed greater than 5.33 m/s where Fnet = 0. The cart must have an equilibrium speed faster than the wind for Fnet to equal zero. If so, then the cart could be powered by the "wind" indefinitely at speed greater than the wind.

@@andrewsnow7386 Yes air speed in the room is zero thus there is no wind power. Same way as there is no wind power available to a vehicle traveling direct down wind faster than wind. The cart is powered by the treadmill while restricted by hand (is just a treadmill powered fan not a vehicle in that case). When hand is removed the cart accelerates forward powered by the stored pressure differential for about 8 seconds. After those 8 seconds the vehicle will start to decelerate (negative acceleration) as it is powered by the treadmill and if the treadmill was not limited in length the vehicle speed will decrease all the way below wind speed where the steady state will be. So steady state is below wind speed and not above wind speed. The video demonstrate that by showing that after 8 seconds when cart acceleration the cart is not at steady state but acceleration becomes negative and so steady state of the setup will be when vehicle is below wind speed. I also show why the cart accelerate against the treadmill direction (stored energy in the form of pressure differential or put in a different way air potential kinetic energy) and I'm able to precisely predict that cart will only accelerate to the right for 8 seconds using that less than 2 Joule of stored energy at the start of the experiment. So Fnet will be zero twice. First time after 8 seconds from the time cart is released and second time after probably 10 to 12 seconds but treadmill was only long enough to allow another 5 seconds of travel. Still is clear that Fnet was positive starting to decrease from the moment cart was released from hand got to zero after 8 seconds and then became negative for the next 5 seconds before experiment ends. With 5.33m/s the cart got to around half the treadmill before starting to decelerate while at 5.66m/s the cart will have had more initial stored energy and so it will have started to decelerate only when it was almost at the end of the treadmill. If treadmill speed was below 5m/s then cart will not have enough stored energy to accelerate at all to the right and thus it will directly start to move to the left (in the direction that treadmill moves).

I didn't think a more intense flame would gain you much. The issue is absorbing all the energy from the flame. A heatsink on the bottom would probably be better, or some kind of nozzle that would spread the fire/heat out more.

when he added more knots to the candle it produced more electricity. so maybe im not an scientist but this for me means that more heat = more electricity.

@@prodjament Lots of heat escape around it in form of hot air, so a heatsink on the hot side would have made an improvement, but the brute force approach is a tried and true method

The main issue is that peltiers are not very efficient. Adding the ice is like adding a battery. It is stored energy in the form of solid water. Adding heat helps but you have to dissipate heat from the cold side just as much to maintain a steady flow of energy. A larger heat sink on the cold side and getting the bike moving faster would allow more airflow to dissipate the heat. There is a heat limit to these devices, where the internal solder starts to break down.

@@prodjament It's more complicated than that. It's the difference between upper and lower plate. The more difference the better. But too much heat on the bottom might also heat the upper plate and ruin the balance.

The problem is it would be harder to pedal than a normal bike, meaning you get tired faster. You would perhaps for less time, but actually use more energy since some is lost converting it to and from electricity.

the same issue accurs with the bikes that have a generator and engine instead of a chain or belt, you lose alot of energy but there is alot of advantages such as no oily bits and whould be better for services that want to perform little to no maintenance@@ADBBuild

Unfortunately, it is not. Stirling engine is mainly based on its pistons and expansion/compression of gas as it's heated or cooled. It uses similar cycle to a Carnot engine (which is its main advantage). However, if that will cheer you up, Stirling engine could be used to power a machinery with heat and cold - with the heat coming from nuclear breakdown of certain isotopes and cold - from near-0 temperatures of vacuum of space - and that's why it's used e.g. for deep space probes. The car here uses what's called a thermoelectric generator - and is an alternative for using Stirling engine for the same thing (just like e.g. gasoline car is an alternative to Diesel car).

Never heard about it. The system using a CVT instead (that they experimented with when owned by Geely) to me sounds as a way more reasonable way of using a flywheel as energy storage.

@@TarenGarond UKposts won’t allow me to post links but if you google Volvo mechanical kers you will see a few articles

I refuse to believe that he isnt 😂

No, because that's false. Ampere turn math has been around much longer.

Sadly would not work.

In this house, we _obey_ the laws of thermodynamics! The generator prop would, by design, cause massive drag as it generates power. It relies on wind resistance to spin the prop. It wouldn't even work as a range extender, you can't get more power out of a generator than you put in under any circumstances.