Finishing The $100 Wind Turbine

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[@MrMoekanz]

This has been a great series , I just binged it. I would love to find out how long it takes to charge the battery.

[@aliphian]

Awesome rob! Thanks for including us in your process. This is some of the best content on KZbin!

[@ThisRandomUsername]

Rob, this would be a great time to stick the meter in-line with the circuit to measure the actual current going through the battery. Seeing you're charging a 12V load, you could quite easily calculate the power from the current, and you wouldn't be measuring short-circuit current. Also, what's the open-circuit voltage?

[@canadajim]

Agreed. Even if it is *100W* it was only 100$ which would put this actually very high up the food chain with regard to cost/output.

[@nigeldolman954]

What would be really really useful is a wind generator + graphene battery combo.

[@evaluateanalysis7974]

@@canadajim He hasn't shown more than 10W output.

[@dongraham4760]

@@evaluateanalysis7974 Exactly , it's a non profit con if you know what I mean . He does not even realise the ramifications of wind speed in the output calculation of a wind turbine specifically the velocity cubed component . Pwind = 0.5 * ρ * v³ * A where: A is the sweep area ρ is the air density, assumed to be 1.225 kg/m³ by default (you can change it in advanced mode) v is the wind speed - the typical usable range is approximately 3-25 m/s

[@RichardJucewicz]

@@dongraham4760 Hi Don, do you know of any reliable instruction for a windturbine?

[@TheDFekz]

Found this by accident. Watched the whole thing. This is brilliant. Appreciate your no nonsense approach and honesty. Great project. Inspirational to watch this. You should be proud of this.

[@urielsmachine997]

Excellent design Rob. My challenge to you is to plot the charge rate using the fan/blower so that wind speed is a constant and then do the same with a venturi style input shroud that vents the exhaust through the top and bottom of the rotor. Extra work but I think you will be delighted with the increased efficiency. Keep up the great work.

[@GlennHamblin]

I wish you did a current measurement as well as the voltage measurement. Also RPMs. With the blower holding the rotor at a relatively constant speed you could derive a nice windspeed to power baseline. 🙃

[@ThisRandomUsername]

My thoughts exactly. You can quite easily derive a rough value for the RPM from the video though.

[@Godshole]

He has a workshop full of ammeters. He simply refuses to do it.

[@gustavfenk4021]

Need to find out what the SI unit of awesome is before doing any measurements.

[@GlennHamblin]

@@gustavfenk4021 LOL!

[@GlennHamblin]

@@matutolaYT You can baseline RPMs not necessarily wind speed. He already has a chart for windspeed to power, so he must know what the RPMs are at a given windspeed right?

[@JonhsonJones]

The project is interesting and the turbine well built, but there are some concepts that are not taken into account in the explanation and drive misconception about wind power production. 1- the curve is theoretical. No actual turbines show a Betz efficiency. Typical efficiencies range from 0.15 for Savonius VAWT to. 4 for highly efficient Darrieus VAWT. The turbine in the video is a derivation of Savonius. 2 - the reason for the lower efficiency is due to the aerodynamic phenomena around the blades and to the charge controller (mppt) settings. Look for Paraschioviou's books on turbine performance modeling 3 - the biggest error people do buying a wind turbine is to rely on the nominal power value. What has financial value are the Watt per hour, and this is obtained by combining the real wind turbine power curve (not the theoretical one) with the annual wind speed Weibull distribution of the installation site. This is the major reason for client's unsatisfaction when installing a wind turbine. I find noble the attempt to make wind turbines easier to understand, but caution shall be applied to oversimplification that may undermine confidence of customers and people in general in the technology.

[@ifitsfreeitsforme1852]

It would be interesting to see something like this adapted to work with water. It could be set up at a remote retreat with a stream to maintain batteries and run lights etc.

[@idahobob]

Mechanically it is looking very good. With the bridge rectifiers on the coils, they will stop back-flow, so you don't need the diode on the filter cap. Also, with that many coils, I'm willing to bet that if you put a scope on the output, the ripple will be so low, you don't need the output cap, especially the few uF of a microwave cap. So just connect the output of bridge rectifiers directly to the battery for the test. It will work fine. In a more permanent setup, , the main problem is runaway at high winds. You'll eventually will need a dump load or a mechanical way of stopping it. Last, if you are expecting something around 2KW, then at @ 12V, that's 166A! In your final setup you'll have to get much more beefy bridges than you have (and think about fusing... maybe just small sacrificial hookup wire to the coils?)

[@twobob]

this was my fear, runaway is not accounted for here. Sure he doesn't get high winds often as he said but it only needs to explode once....

[@dukeman7595]

Enjoyed the entire series; the concept is brilliant, you should be proud of your accomplishment.

[@kerry9125]

Why not put 38 more coils on the top of the generator, similar to how they're placed on the bottom? How would that affect output?

[@edkoetsier339]

Rob, I make wind turbine's for fun and profit. We need to know wind speed (you have an anemometer and a multimeter...), rpm, volts output, current output. I mean, you have to know that it is above 12v to even charge your battery.....

[@michaelward402]

If you notice he said the Voltage is 12V045 at that moment in time as he was charging the battery. The battery is of course a load and will lower the open circuit Voltage depending on the state of charge. A flat battery just needs a differential Voltage to charge it, so 12V is not really worth while for charging a lead acid battery, which should be charged at around 13V5, however as long as the differential Voltage is big enough(but not too high) the battery will charge.

[@davidnolan6087]

Congrats Rob! I understand that many people can offer advice on how to improve something after someone else has done the ground work and that is great. Any viable improvements simply make the whole project more successful. However, lets stay focussed here on simple economics. Once you have built a unit, at whatever final cost to the individual. In Rob's case less than 100 quid, because he scavenged parts and did the work himself. Your pay back is only a matter of time. With virtually no operating costs of the unit, and no doubt very little maintenance moving forward, you will generate enough electricity to pay off the cost to build. Once it has repaid the manufacturing costs the rest is all profit. Now that is what I call a great result. Invest some time and effort and a little bit of cash for an indefinite period of reward. That's great economics if you ask me! I cannot afford a commercial wind turbine, but I can copy Rob's work and afford, in my case, a couple of hundred Aussie dollars.

[@clintonrobinson8070]

Great point, It's a garage project done on a tight budget and I think he's achieved an awesome result. It also looks like a very low maintenance design and could easily be upscaled for more output just by adding more coil packs and magnets. I believe his design must be more cost effective than a commercial model and he's also teaching and inspiring people in a fun way.

[@simsimakov1457]

This is the best and most effective desigh of the vertical turbine.

[@richardsandwell2285]

The idea is really interesting, I love the way it has changed and evolved. The other day was a first for me, I finally broke open my first inverter type microwave, I managed to desolder and save two IGBTs and some Capacitors, inductors and a nice power resistor.

[@Moist_yet_Crispy]

We have to figure out when it pays for itself because that is the major point of celebration!!! Once again this is amazing and I hope to get to a project like this in 2021.

[@dongraham4760]

Please don't waste your time , this guy doesn't know what he is doing . There are many fine books available that will teach you everything about wind turbines and you can even learn the simple turbine equations which if he used would have saved this clown hours of work !!!

[@MichelBuitendyk]

Great series, I have two questions: 1 Did you ever think of adding the same amount of coils on the top of the turbine. I have this question since you indicated that the amount of coils did not slow the turbine down. 2. What would it take to have either increase the surface of the vanes (make them wider) and/or could the vanes have a small lateral movement. They would be "teeter-tottering" not unlike a sailing vessel. When they go for the wind, they show more surface. when the turbine turns 180 degrees they would be "cutting through the air" lessening the friction from the vane against the wind. I am not an engineer, I am more a thinkerer than a tinkerer. I did some sporadic sailing when I still lived in Holland and was the guy that had to move the boom from one side to the other to catch the best/most wind.

[@whitneylake2107]

Now that is true repurposing or "up cycling" of many parts and demonstrating the model works. Thank you

[@couchninja2997]

I'm glad to see to took my advice on the dryer drum and coil now you have the generator! It would be just amazing if you would incorporate A water (RAM PUMP) gravity and enclosed tank system using squirrel caged as water A turbine and you literally have a endless power supply with water of course can be collected from rain on roof and stored in tank being main source of water and your supply and a recycled use of water supplying the ram pump in an all enclosed system! You can also make a trompe creating air pressure making a hybrid!

[@dongraham4760]

Get off the couch and go to the library and get some basic physics books , study !

[@DeffeDefect]

Impressed and inspired! Will for sure build a similar wind turbine as a compliment to solar panels charging batteries. However, I would love to see the end result of this build, running a few months "on the roof"... :)

[@martinmoore6545]

So if it is free running even when generating current would it be good to add another ring of coils above the magnets to double the output? If that is possible the maybe you could make say a four stage generator or as many as you want. All very interesting and thought provoking.

[@pierredelport7187]

Hi Robert. Great project. I started following your channel after I discovered it sometime last year during lockdown while on KZbin and as I also like to salvage parts from thrown away stuff, I liked the way you also do the same and the nice way you share those ideas. I have dozens of boxes full of spare parts of everything in my garage and also like to build something of it. I can also share your feelings of welding and although I have been welding since 1975, I still struggle as I am not a professional welder and only weld every other month or so. Every time it takes me a few welds before I can weld reasonable again. I wanted to build a VAWT now for a while and do like your latest design. I personally feel the structure as well as the magnets and coils are definitely the best option when you want to get the best system from salvage parts. I am however concerned about losses in your system, not mechanical as your design looks like it runs very smoothly and with minimum mechanical interference. My concern is with the electrical losses in the diode bridges rectifiers. If you did use the cheap ones, you will have +/- 1.4 volt loss with each diode bridge. I do not know what voltage is generated per coil and if it is high, then the 1.4V loss could be insignificant. If the generated voltage is however low, then the losses per coil could have a huge impact on the power generation of the unit as the same losses are per coil and the total loss is the sum of the losses of all the coils. It could be beneficial to investigate into some other method to interconnect the coils in some other configuration and get a three phase output, which can then be rectified. This will end with a higher voltage and also a lower loss over the diodes as there are now less diodes . It can however impact on the cost as the diodes can be more expensive as their ratings will be higher, but there are still salvage parts available somewhere. You will use only 6 diodes for three phase rectification, where you now use four diodes per coil. Anyway, just a thought from my side and keep on with the brilliant channel and work.

[@wibblywobblyidiotvision]

That's looking pretty damn slick. If you're interested in finding what its actual efficiency is, all you really need, I'd have thought, is a big old resistive load current sink, like a toaster, kettle, or radiant heater coil, hooked up directly to the output, in a relatively steady wind, and measure what it's capable of pushing through it. No, that's not a realistic usage setup, but it should be able to give you an idea of what its actual output is for a given windspeed as measured with your handheld anemometer. Get a few data points, compare to your theoretical graph, and extrapolate if possible. My guess is that you're not gonna be doing too badly, and like you've said all along, it's not really peak power that's important, but what you can pull out at low speeds, but that's still impacted quite heavily by the (electro) mechanical efficiency of your setup.

[@johnsharman7614]

Fantastic job Patent pending? You should. Many thanks 👍😁👌

[@rastamanralph6670]

It will be very interesting to see how long it will take to fill a leasure battery if you have one of them knocking about or one of ones you built👍😉

[@henriksegercrantz362]

Great work. Thank you. We look forward to better weather over there for real testing!

[@SteveEh]

looks Awesome!, Looking forward to the results!

[@hommerdalor6301]

Hello Rob. If there was a white or other than black mark on the wheel we could appreciate the speed. Cheers.

[@MegaPaul57]

fantastic i wonder if you made the bottom disk a little bigger you could generate of both poles of the magnet by putting another ring of coils above in fact you could fit 4 generator coils to your device by fitting 2 coil systems to the top disk the possibilities are endless but you have demonstrated this very well

[@ToNy-jj8nx]

Love your channel and your practical experiments! Thank you so much for all your work. This is the type of channel I like to support.

[@tomnugent2148]

A 3 phase axial flux is the way to go. Number the coils 1-2-3/1-2-3 etc connect all the 1's in series,the 2's then the 3's in series to end up with 3 sets of output wires. The coils all go the same way, you make a make a mold fill with autobody resin only thickness of coils,then make another ring of magnets that attract opposite ring,powerful flux between them goes through the coils,makes an AC alternator that you convert to DC with a bridge rectifier to charge batteries you tube james biggar or muddy man videos good going mate. I love to repupose trash.We live in a disposable world which 900 tons a day ends up in the ocean

[@willtaylor8904]

That's awesome Rob! Maybe consider putting a buck boost circuit between the capacitor(s) and the battery as a rudimentary MPPT regulator... 👍👊👏

[@evaluateanalysis7974]

I'm going to add that to my electric bicycle powered by a 1.2V NiMH battery, that'll make it work.

[@draflik]

By adding more magnets and more coils to the top of the turbine you could double your output

[@1967spark]

Perhaps Rob needs to find out how much of the available energy his existing coils can draw from the fan before adding more?

[@headlessxp4948]

Really nice to see that turbine finally seeing some use. I would suggest to remove your "anti-backflow" diode though, as its functionality is already included with the full bridge rectifiers and its just eating up precious voltage at that point. Btw, did you use schottky (0.4V DD) or just regular pn Diode Bridge rectifiers(0.7 DD)?

[@hanslepoeter5167]

I agree. Anti backflow diode is not needed. Magnets seem pretty evenly spaced this time. Spacing coils on phase even distances, put them in series and only then use a bridge rectifier might do and would save the power lost on all individual bridge rectifiers. I'm afraid the power target will not be met by far. Losing the cores and solid oven transformers was a bad idea in that respect. No matter what, it's a lot of fun.

[@gravelydon7072]

Diode is needed so as to not keep draining the battery into the capacitor when the turbine is not producing power.

[@headlessxp4948]

@@gravelydon7072 Yeah sure but we are talking about something in the range of microamperes for the leakage current of the cap. If you are willing to forget about those microamperes, the capacitor just takes power to charge. Once its charged, it acts like an open circuit.

[@gravelydon7072]

@@headlessxp4948 Even multi Farad capacitors have a discharge rate of under two weeks so the mA loss does add up. Maxell 2.7V 5F super capacitors will self discharge in 10 days as an example and may be under usable Voltage in less than a week. Discharge rates per one person's test showed from 5% overnight up to 50% in under an hour. So a blocking diode can help and as Robert is using used capacitors, we have no idea how they fall in that range of rates.

[@headlessxp4948]

@@gravelydon7072 But we are talking about HV capacitors in the 10s of uF or even less and rated for more than 2kV and 10MOhms leakage resistance. Also, if those were to develop the kind of leakage you are talking about, they would dissipate about 0.003 ("the mA loss" -> i will be generous and say 3mA) * 2000V = 6W. At 6W of heat pumped into it, that cap would blow up after no time. This means that even at 2kV, their leakage current has to be lower than what you said ("the mA loss"). And since Rob is using those caps at 12V, the leakage current will be basically 0.

[@jeffersoncaetanoporto8249]

IT'S A GREAT IDEA FOR OUR MOTORHOME. ON A SMALLER SCALE. WITH A LOAD CONTROLLER AND A WAY THAT IT DOES NOT EXCEED A CERTAIN ROTATION SPEED WHEN THE VEHICLE IS MOVING. ALSO WORK WITH THE VEHICLE STOPPED. I'LL GET THIS IDEA OFF PAPER.

[@dansmith6909]

I'm looking at this with the thought in mind to build one myself later. I've done some layouts and i think i've worked out the electronics to make a design similar to this adapt itself per wind speed. I note that your graph ends at 22m/s (50mph, ish). I've not done the maths yet to work out the velocity at the outside of your drum but i'm trying to work out a way for it to deal with very high wind speeds, more to keep it alive during a gale than to maximise power - Did You work out if there's a stall speed for your blades? Eunice gave us a 122mph wind, that's maybe unobtainable but it'd be nice to be able to deal with the surprisingly common on the pennines ~70mph gusts we get.

[@stevetobias4890]

Would love to see how long it takes to charge my 425ah battery bank from a discharged state. I have a very small squirrel cage I salvaged from the fan of an air cooler. I am thinking of adapting this idea to give my solar system a boost but have coils on both ends of the cage. I guess the only way to learn is by giving it a go. Thanks Rob.

[@MTolgaYURTCAN]

How about adding 3 or 4 wind guides. By doing so, you will get rid of negative push.

[@nevertolatetoprepare2802]

I live in an HOA subdivision. Esthetics count for more than increased home valuation. This wind harvester could be concealed within a seeming chimney (artfully painted) and take over the lighting load on a home. Great job.

[@BushImports]

That's great, We'll wait and see what happens then. Even if it is only 500 watts, that's a great deal if you get enough wind for it to do that consistently.

[@roxyroberts1383]

Nice job. Learned allot. Understanding what windpower can und cannot do.❤

[@marcfruchtman9473]

I rally like this Build! It's really a Great wind power device. I am curious how things have gone for this over the last year? Also, thanks for the Betz' Law info @1:23

[@joshiguet1728]

hey Rob, do you already heave any results. whow many times did it toke to load the battery

[@EricDalton1910]

Enjoyed this series. Good information given out which will be of use to many others. If I lived near a running water source I’d consider a water wheel for a constant power supply, coupled with a solar panel or two it would be a helluva saving on energy bill.

[@HansPolak]

Do you have an update on this harvester? Did you put it on your roof? What was the yield?

[@fallknight5405]

I guess if you had more magnets an coils you could add them closer to the center

[@javiermorton7170]

I was thinking this (don't know about electricity much) about different coil types and/or magnets for creating the best production at any wind speed. Another thumbs up video.

[@SaltGrains_Fready]

You shouldn't need the blocking diode; with the bridge rectifiers which do the blocking already.

[@craigsinclair1266]

Got to take into consideration that a 22m/s wind isnt the actual efficency. Betz law states that you are only able to achieve 60% efficiency. So is this 22m/s with 60% taken into consideration or have you calculated minus which is about 14-13m/s of variable speed. Would love to see this installed in a new vid on your roof or where you plan to put it.

[@barbufodor1186]

getting interesting .... hold on Robert! ... let me bring the popcorn. excellent!

[@jlh2119]

Did the $100 wind turbine come to a final conclusion? I would really really really like to have a solution to charge 12V / 100Ah battery(s) in the winter where I live. The wintertime has very little sunshine for solar ... 200 inches of snowfall for the season ... and the wind blows constantly (and hard enough to create snowdrifts of 2-10 feet easily.

[@martynjones973]

Yes current etc would be interesting 👍love it nice job

[@sobeflyer]

Thank you Robert for sharing your time and efforts on this project. I have two thoughts about improving the design from the aerodynamic end.... First, the cost of the material for the blades is very low, and doubling the length of the blades would double the area of wind energy collected with no more effort or materials at the top or bottom where all the electronics and mechanics are. Second, the baffles can be increased in number and rotated counter clockwise maybe 30 degrees to bias the incoming wind to improve the efficiency of the blades collecting the energy. Adding and canting baffles would increase the wind pressure on the inside of the blades, while decreasing the resistance wind pressure on the outside of the blades. You would be in effect creating an aerodynamic stator on the outside of your aerodynamic rotor. Think of it this way... you actually have the mating of an aerodynamic rotor/stator pair with an electrical rotor/stator pair.

[@scantrain5007]

Dear Rob, I think this system is brilliant! If you compare the price for this to a solar pannel where you get off 1 sqere meter abotut 250 W under optimal circumstances. But the main thing is: A solar pannel you cannot create by yourself, but this Wind Turbine! Hope many people will copy this instead cying about tale of tears in the winter time using Photo Voltaic only.

[@Teknopottu]

As a matter of fact, you CAN create a solar panel yourself if you check, say, Robert Murray-Smith's videos on the subject. Surely not as potent as this generator but still, an opportunity for being a wise ass not wasted now.

[@Buzzhumma]

Those microwave caps have bleed resistors on them which i beleive will create a fair bit of loss Robert 👍🏻

[@deslomeslager]

Not at 12 Volts mate. 2 Mega Ohm at 12 or 13 Volt (max. 15 when the battery is full) is like 7 or 8 micro Ampere.

[@Buzzhumma]

@@deslomeslager oh ok 👍🏻. Every time i have charged one in the past i have tried to measure the voltage and it had already dissipated but yeah i should have done the maths ! 👍🏻

[@LOFIGSD]

When are you going to show it in the Wind working?

[@georges3233]

Unbelievable smart machinery ! 😃😃😃😁

[@Maestrodeluniverso]

Rob, Inspiring work. I will try to reproduce your design to light the house in the Colombian mountains. God bless you regardless if it works or not.

[@rccapps]

Mr Murray-Smith: This is some inspired work for pig-headed VAWT enthusiasts like myself! Any chance of a video update with more field testing? Also, any chance of the shroud/cowling making a reappearance, or was it ineffective at concentrating the incoming wind? Cheers, Rob Capps

[@JohnDavidDunlap]

I'm super curious to see the results from running this on your roof.

[@TheDFekz]

Has a video been made of that test yet?

[@jam99]

@@TheDFekz Can't see one. One can only conclude this was a complete and utter fail. Just a shame there is no video giving the results. Very odd for such a seemingly down to earth guy. He seems not to have much of a clue about electronics/electrics so I guess it is no surprise.

[@diegogavani5679]

Wonderful job! I'm looking to make something similar if i just could have the same hand work capacity, anyway i'll start with a smaller turbine to install on a balcony so i think i could use a car alternator, to get smaller size but enought results

[@Johny40Se7en]

That is an incredible build, well done to you fella. I'm a heck of a newbie when it comes to electronics, and I'm wondering you'd do a simple tutorial on how to wire stuff like that up from the magnet down to a capacitor and battery etc. I have no idea what a full bridge rectifier is... 😅 I do know that a rectifier changes AC to DC, that's all.

[@lexiusnez9034]

So... When are you gonna finish this series and measure the amount of energy this turbine makes??

[@kirkjackson769]

Hi Rob, when this project is completed and you've exhausted variations would you be willing to share schematic plans? This is exactly what off-grid needs along with solar and or water turbine.

[@penrithomas115]

Amazing project. One question if applied the design to a exercise bike could that be a practical power source? I was thinking less weather proofing

[@AndysArchives68]

this will be ideal for my next project

[@glennwebster1675]

Awsome...can't wait to see what's next.

[@docink6175]

People who complain that it doesn't put out enough energy or whatever aren't looking at the big picture, if this can charge a battery for what you've got in it that's free energy or almost free energy and you put four or five of these on your roof or operating in the same windit's nothing else they're working as a supplement to any solar or other type of power do you usually charge your batteries and if not free as close to it as possible

[@mikaelfransson3658]

If you take your "hub"-motor and take permanet magnets to work under tha coils to! Can that increes the current the WAVT counterclockwise and the magnet under the coils clockwise! Thanks for a great project to follow!

[@Jeff-gt2xu]

This has been a great series and I too have just binge watched the whole thing ( like MrMoekanz below said). If you are up to making any other modifications, I wonder if you would be interested in adding a Marx Generator around the bottom, near the coils before the charge goes into the larger capacitors and then into the battery for charging.

[@moking8095]

Of all the differing generators, pick the most inefficient type to aim for 1000W. The only efficient type is what is used on the superwind farm generators and they are generating high voltage which can be easily transformed and made to traverse great distances with minimal loss due to resistance. The only way to generate 1000 w is to firstly use the neomidium iron boron magnets, not the weak ceramic type. The windings need to be a continuous run in and out sinusoidally serially through all the magnets with something like 500 volts output then transforming to the desired voltage. This method keeps the operating voltage high and the current low reducing the losses to a minimum. You were on a sticky wicket right from the start.

[@fenceup07944931177]

I'm just working my way through this project. Sorry I'm late to the party. I'm finding it very interesting. One question that has crossed my mind is, do you think it will ever generate as much power from the wind, as you have used to test it.

[@dazer123]

I really like the simplicity with only one moving part. How do you intend waterproofing all the coils. You could use the waterproofing spray that off roading groups use ?

[@poseidon201]

Would they still work if u just embedded them in resin?

[@dazer123]

@@poseidon201 you could but if you had to replace a faulty coil that's a lot of hard work removing the resin

[@poseidon201]

@@dazer123 sorry I meant individually. I mess around with leftover roofing resin. Its cheap as chips when you buy in big drums. Could you not put each coil in a tiny cardboard box, or something similar, with the wires trailing. Fill the box with resin to make a small block, then glue or clamp in place, so each can be individually replaced. ??

[@jeffcossaboon5012]

Two questions: 1. Could you not have used a commercial blower cage and saved yourself a lot of time and effort? 2. Could you not repeat your generating apparatus on the top and almost double your output?

[@nowthenad3286]

You are such an intelligent and interesting man.

[@maxkennedy5073]

Did you ever get a power vs wind speed measurement to compare to the theoretical?

[@matthewtalbot-paine7977]

Yes how long will it take to charge the battery is exactly the data I am looking for!

[@Ricobass0]

Why the extra "blocking" diode when all the outputs are coming via bridge rectifiers? The storage capacitor/battery can't discharge back through the coils with bridge rectifiers in the way.

[@karlmyers6518]

You are so bloody awesome mate. I can't help but think its super efficient because you made it. My first hho generator seems to produce ok but I failed to seal it properly so I need to go back and play some more.

[@garethb5729]

What do you use your HHO with? I mean how do you use the gas to generate?

[@karlmyers6518]

@@garethb5729 I want one for my car, one to replace my blow torch and I'd like to make a workshop heater. I'm not sure if I understand the question mate

[@garethb5729]

@@karlmyers6518 ok yeah sweet. That's what I ment. Do you want any tips?

[@karlmyers6518]

@@garethb5729 Yes please, I went for. Fairly simple setup with a 2ltr mayonnaise jar , really fine stainless mesh and bicarbonate soda. I might look at buying some gas fittings. I now have a couple of microwaves to make more amps but each setup will probably be a little different for different applications

[@garethb5729]

@@karlmyers6518 316L grade stainless works best. Car. The ignition source occurs a few degrees before dead center for standard fuel. Change this timing too a few degrees past dead center. Torch. About an egg cup size of HHO sounds like a shotgun at point blank range. Keep your bubbler small. Make it on demand, don't store it. And pay extra attention on your flashback arrestor. Tbh I haven't spent much time on torches, far too scary for me. Heating. Pump the HHO through a catalytic converter and it recombines into water. Red hot with no flame.

[@flyingfree2229]

Double the output energy... one spinning drum but two ends... put coils and magnets around the top too

[@RedPillRachel]

Which is the next video in the series? I watched all the way to here.

[@klauszinser]

When i remember correct, your original wind generator had a diameter of 1m. On the height maybe 50 or 60cm. Now you went smaller where i would have expected that it would make sense to keep the diameter but maybe increase the height to 1 or 2m. What i like in the design, the generator is working with small forces.

[@sootymammal2891]

22 meters per second is like 50 mph!

[@AtlasReburdened]

Didn't he say "feet per second"?

[@pinballrobbie]

@@AtlasReburdened His last comment was in meters lol

[@ThunderDivine]

we have that on and off all the time.

[@dongraham4760]

And 50mph wind will spin it at 3820rpm !

[@Riddle-Me-This-Puzzles]

You largest losses here are probably the diodes figuring diode drop. Considering that it would be better to space coils properly, build them in phases to increase voltage. This will lower the effect voltage drop loss from the diodes. Then you can use an efficient buck converter to get battery charging voltage. Diode voltage drop on low voltage is a real energy theif

[@KetogenicGuitars]

It would be nice to know the price adding up from cheap but real life obtainable new parts.

[@jeffgrave]

Love this guy! He is an engineer version of Anthony Hopkins- the Welsh actor :)

[@thomasmoore4576]

What kind of open voltage do you have

[@burnroe6611]

If you were to have a way to double the speed of the coils passing the over the magnets without changing the gearing or wind speed. Would that double its efficiency ? And could you guess what kind of modification i am thinking of its relatively simple .if i had the proper materials i would do it myself.your projects allways get my brain stirring thanks for that .

[@colingreene7359]

how about fences on springs and how they would move but not fall to use as a power source?

[@wardp.9832]

Greetings from Winnipeg CANADA Rob, really enjoy all your builds (especially the past few months). Nice to see the cool projects (i.e. Steam Punk stuff), and the practical stuff like THIS WIND TURBINE. - When might we see what this generator can produce? PUT in on the ROOF :) Thanks in advance!!

[@wardp.9832]

Just thought of a question --- And INDUCTION COOKTOP can be made from SPINNING MAGNETS to efficiently heat a METAL POT. IS the BASE MAGNETIC ? Could the base be AFFECTING PERFORMANCE in any way? Cheers!!

[@terrencesalzwedel6742]

put a variable load on it adjust till it starts taking strain measure voltage and amperage, W=VxA which is power output

[@ahbushnell1]

22 m/sec. 50 miles per hour. Sounds practical.

[@shipitin]

Does the fact that you dont give us any empirical real world data in higher winds imply that it did not function as well as you hoped? Incidentally I loved the process and innovation. I need something along these lines for my own garden in France where we regularly get 10knt - 20knt winds.

[@1967spark]

If I am not mistaken aren't wind speeds of 20m/s more usually known as "Gale force" winds?

[@hempev]

That's 45mph - by then it's not output that worries you, it's survival!

[@gravelydon7072]

@@hempev We have summer thunderstorms that produce winds stronger than that. I've driven in winds higher than that. When winds get above 100 is when we start getting worried. The shingles are only rated for 120MPH.

[@hempev]

@@gravelydon7072 Big commercial units have survival ratings from 40-72m/s, and some off-shore units are rated to 80m/s (that's 180mph), but a typical wind farm **stops** all rotating mass for safety at +/-60mph (wind turbines have been known to catch on fire due to over-speed braking). Anything that weighs less than a grown man shouldn't even be running *that* high.

[@gravelydon7072]

@@hempev I was in a government built building that had a door rated for 180 MPH +10%. Hate to say it but that door failed early on. We had evidence of tornado strikes on our home but the reason we lost shingles was the flying sheet metal from a neighbors shed roof in that same storm. The eye wall was recorded as at 155 MPH sustained. Our home was dead center of that storm and one of the few surviving power poles in the area is out front of our house. It was put in when our house was built over 40 years ago. Cat 5 storms are no fun and I've survived two so far. One Atlantic storm and one Pacific storm. I'd just as not see a third one. Our home is hardened enough that when Hurricane Irma came thru, we couldn't even claim enough damage to get paid by the insurance company. The local power companies shut down the local nuke power plants when the winds reach 55 MPH sustained. The grid stays up on power generated outside the area that is affected and they keep the natural gas powered ones up till winds hit 100 MPH. Haven't heard at what point they shut down the solar units but my guess is at 100 MPH also so as to protect the grid. Most of our main powerlines ( 3 phase ) are on concrete poles now but Andrew even shattered ones that were two ft across.

[@hempev]

@@gravelydon7072 Life in Hurricane Alley!! Add to it climate change... We get the most destruction from earthquakes, and they're years apart.

[@andypag1071]

I guess the reason why this is an uncommon approach is that manufactures assume that if you're going to go to the effort of installing a turbine you'll put it somewhere windy.

[@chidi21]

My next project! Thank you so much for this series!!

[@tanksoldier9770]

I spin things all the time with my air compressor and a blow gun

[@patrickhvid1314]

you should have put a watt meter on and left it on the roof just to get som RESULTS ! however that would only generate something like 100watts i 15 m/s

[@michaelward402]

It would be interesting to know the open circuit Voltage and the short circuit Current, to determine the best way to control the battery charging.

[@PiotrFicner]

It's been a while since it was finished :). How this turbine is working now if I might ask? Do you still use it and what are the thoughts. Would you share your thoughts, or create an update video about it, please? :) If not, maybe a video for members? :)

[@pulesjet]

Would like to know the current it was producing during this test.

[@evaluateanalysis7974]

You are right, that is a fundamental question that remains unanswered, I wonder why?