Building a 1kW Wind Turbine For Under £100 - Part 2 - Rotor Wind Test
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- čas přidán 2. 11. 2020
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That spins great in the car park! This, so far, is the best-looking VAWT I have seen yet. All good wishes!
1:20 he threw the turbine by hand and let it spin, it's not the wind that spins it
Robert, about those bearings. If someone is trying to build this from scratch the bearing size that you used is a 6005 (47 x 25). If buying one new you should specify 6005-2RS which is a sealed deep groove bearing. Deep groove bearings are better able to handle the axial loads created by gravity with the rotor oriented vertically. The 6005-2RS has an axial load rating of better than 300kg, which is more than enough for this application. Very well done!
Its not gravity, Is just that materials with densely packed particles are heavy depending on the element some dense structures are heavier than others. And it just so happens that most things are heavier than air. Due to denstiy.
Yes, there is a bit of weight in that thing. The bearings he has is fine for testing, but for long term use it would be better to go with your suggestion. If built in metal it will be a lot heavier and if you put some weight in it for a flywheel it will be a lot heavier. Thanks for pointing that out Mark.
thank you for posting that mate - that is really helpful - to be honest if I bought the bearings I might go for some more suitable for this job - I am just using what I found and trying to moderate it for using it in this orientation - I think you are right they will do just fine given what I am doing with them and the load on them but it would certainly be better if they had a conical design
@@EnterTheRealm strictly speaking the weight of an object is defined as an objects mass multiplied by the gravitational constant, which in our case on earth is around 9.81 ms^-2. Density is a measure of mass per volume and is not used in the measurement of an objects weight.
@@michaelpearson5465 strictly speaking the gravitational constant is non existent. The force doesn't exist so nullifies what you have said. In only works in theoretical maths. In reality its just density.
Just come across your channel love the project I have subscribed looking forward to you testing it in the wind it's should do pretty well by the looks of your test. I need to go and watch the other episodes thanks for sharing.
Great to see it spin, can’t wait fir the rest now. Top job, I think I’ll have to make one too if it turns out ok. Free energy, what’s not to like. Well done Robert.
lol for sure mate
I used to love watching the Christmas lectures as a boy you make every show just as interesting and fun thx Robert...
Its going fantasticly Robert, youll be very proud of how its turning out for sure.
Im over the moon seeing you enjoy this project. Ron.
cheers mate
Love it, cant wait to see part 3. Keep it up!
cheers mate
I love how you used the bottoms of hydraulic office chairs to stabilize the turbine. A+
Agreed.
funny think to work so well lol
God has said in the Quran:
{ O mankind, worship your Lord, who created you and those before you, that you may become righteous - ( 2:21 )
[He] who made for you the earth a bed [spread out] and the sky a ceiling and sent down from the sky, rain and brought forth thereby fruits as provision for you. So do not attribute to Allah equals while you know [that there is nothing similar to Him]. ( 2:22 )
And if you are in doubt about what We have sent down upon Our Servant [Muhammad], then produce a surah the like thereof and call upon your witnesses other than Allah, if you should be truthful. ( 2:23 )
But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers.( 2:24 )
And give good tidings to those who believe and do righteous deeds that they will have gardens [in Paradise] beneath which rivers flow. Whenever they are provided with a provision of fruit therefrom, they will say, "This is what we were provided with before." And it is given to them in likeness. And they will have therein purified spouses, and they will abide therein eternally. ( 2:25 )
Quran
@@ahmdabdallah5811 Praise be to the Creator of all the Heavens and Earth. Whether you choose to call him by whatever name. Our Father helps those, whom choose to abide in his loving kindness.
@@ahmdabdallah5811 please take your gestures elsewhere. People don't like to be disrupted by your non sensible herecy. This goes for any "historical" works. No one wants to see them; thanks. -1 for Allah because he sent an idiot to irritate me today, I'm sure there's a verse to help me? Amirite?
It spins so easily, and keeps running a while I expect this to be a total success and will likely generate more than your target. Love it! 🌎✊🏽🌻✌🏽
Fingers crossed!
Great project.......I love how engineers can recycle materials to build useful machines, if you can produce power for lighting or electric heater, I read a blog of a guy that generated power in Canada and used it to heat a immersion heater and produced hot water...
Great videos, going to try do the same using bicycle wheels for the top and bottom. Thanks for inspiration keep it up.
how did your wind turbine turn out?
That's really cool, it looks nice. You had some nice salvage materials to work with, I think it's great, it surely saved you a fair amount of money and work.
those smart boards were a real find mate
I'm a retired electronics engineering technician going to try building a vertical wind turbine generator that is a little different, I've had this idea for about 15 years I just haven't done it yet. It's time to turn a drawing into the real thing. Not connecting the turbine to a generator but turning the turbine into the generator with no belts, or shafts. I'll probably make it out of wood, and fiberglass in resin and use bronze bushings with neodymium magnets on a shaft for bearings. I figure there are blade angles that work the best so I'm watching videos and learning before doing it myself. I like to use wood because I can cut and fill wires and magnets inside and after fiberglassing it's super strong and can take good g force, also I have done this construction skill before building robots, test equipment, and hot rods. I plan on using magnetic sensors maybe Hall effect and some kind of digital speed controller that will turn on and off power resistors for braking. The magnetic field on the turbine created by the resistor load will slow it down in high winds. I would like to find an already-built module for speed control but if I can't find anything I'll use open-source robotics software that can run on something low-powered like a Raspberry Pi. just have to get something small working. I think using robotics software I can use part of the circuit as a brake while using the other parts to generate at the same time if the batteries need it. Also, anyone like hobbyists or students can rewrite apps or subroutines for it.
Yes I did, very excited for the next instalment. Great Job.
Awesome! Thank you!
Great job Robert, Kudos to your ingenuity. I would appreciate a closer inspection of the additional nuts and bolts you used to secure the blades. Keep it up!
Great suggestion mate - I sometimes just don't think about what needs to be shown - sorry about that
Mate, that is coming along very nicely. Thank you.
cheers mate
Well done sir! Thanks for the walkthrough.
That's a cool idea, looking forward to seeing it work with magnets and coils, nice video
cheers mate
This is getting very exciting. Can't wait for the next instalment.
cheers mate
Wow. Great result. Congratulations.
congratulations, nice project!
Quite impressive Robert. Agree with another comment about it having a calming effect. The wind speed and number of vanes/blades must be some golden ration thingamajig.
lol - may well be mate
Such a great project, can't wait for part 3 and hope there will be high wind to test aha
the build will be done soon - might have to wait for a decent wind lol
Very interesting, can't wait till the final version 👍
You and me both m ate lol
The weak point will be the blades. You would do well, to place a spacer in the middle of every blade, attaching one blade to another. Then, you will have an official "squirrel cage", just like in many HVAC units.
Fantastic Robert - Thank you so much 😊 👍
glad you liked it mate
Outstanding :) Well done.
This looks absolutely awesome
cheers mate
You do have fun trying things!
I'm excited to see this thing generating some power!
me too mate
Looking even better now it's vertical. Looking forward to seeing what it can generate.
Please be careful it doesn't take off and chop someone's head off! ;-)
I was thinking of making the blades from sharpened steel just incase it did fly apart but then I realised I was being mean lol
The shaft needs to be supported on both sides with a rigid mechanical bonding, yet most of these turbines wear out over a few years because the frame should have springs to permit some flexibility. I would also add shock absorbers to eliminate chatter or extremes. Without full frame flexibility, the unit wears all in the exact same places and simply fails an early life. Good luck.
Brilliant video thank you 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍 brilliant man
Can't wait to see more.
cheers mate
very cool, you could also mount magnets & some microwave coils on the top rim, &/or add afew outside vanes to focus the wind onto the blades.
I would think so - I don't know if I will though
Looking good!
Thank you! Cheers!
Just rewatched this brilliant btw was thinking would your serpentine coil and magnets on the bottom edge of turbine work.
I do realise the amount of wire would be huge and a massive pain to make. Thanks
new content idea- "wind turbine ASMR" LOL. that things spins so smooth its quite calming
lol
Lots of room for improvement with little cost. Like old Muslim windmills, cover the half that is returning against the wind with holes to allow the air pressure out on the sides, then on the other side have a bit of plywood or something sticking out to the left channeling more air into the active bit of your windmill, like a funnel is for water and it will spin faster with more torque. IF you want it faster for longer, use ceramic bearings as well, they are brilliant but not cheap. You can store excess in super capacitors and lithium batteries, then when the wind dies down, you're good to go.
And now a Fisher & Parker washingmachine motor as generator? Love your channel mate! Great work
I just glued some magnets onto the bottom mate
Sorry , my mistake. You said it about the MOTs etc. Keen to see your project. I’ve just ordered some ss-sheets for the hho-cell you demonstrated some weeks back. Great idea! KR Hans
Good luck with your project. Renewable energy rules!
cheers mate and it does indeed
Coming along nicely,
cheers mate
Very Impressive !
This is a way smarter design than the usual horizontal ones!
Man alive!! Hahah how about a face off against the wooden one. Great stuff 👍
lol - for sure
Smart looking machine Rob! A few others have said - I would have put the supports outside to keep the air flow cleaner through the centre - assuming it's a crossflow design you're going for? In terms of your 1kW output target - assuming it's 80cm high and 80cm diameter you're looking at a 50m/s wind (assuming 0.2 Cp and also assuming my calculations are right!). That's some storm!
to be honest mate I am just going by the power curve on a representative 1 kw commercial turbine - I need a wind speed meter really and I plan on seeing how it does in various wind speeds and doing a comparison - you are quite right I think it will need 25-30mph wind to have a chance at 1 kW - but so do commercial wind turbines of fan blade design - so we will see - 50 m/s is one hell of a wind though - so maybe it will fly apart - that will be fun lol
Hi, I'm watching this with a smile. As I needed inspiration for a Hydro project. I was thinking the same about using guttering for the foils but not as thick width wise.
seems to be working out nicely for me mate - so go for it
for a water wheel i used square down pipe
what do you think would be the problem if the wind vains went all the way to the center?
It seems the blades should be on a "collective" similar to helicopter blades, where the angle grabs the wind for up to 270* of rotation, and "feathers" thru the other 90*
This would require lots of rods attached to an offset crankpin, and LOTS of little bearings on the blades.
Great stuff. 'Love it Rob.
-One question: are you considering magnets and coils only on the bottom or both bottom and top?
just on the bottom
@@ThinkingandTinkering it would be awesome on both !!
Love the VAWT, I would wager you'll get about 250 to 400 watts out of it based on size and number of blades but, it will be cool either way. Hopefully you can reach the RPM needed.
to be honest mate I am just going by the power curve on a representative 1 kw commercial turbine - I need a wind speed meter really and I plan on seeing how it does in various wind speeds and doing a comparison - you are quite right I think it will need 25-30mph wind to have a chance at 1 kW - but so do commercial wind turbines of fan blade design - so we will see - maybe it will fly apart - that will be fun lol
Just a question with it. Could you mount magnets on top and bottom and change mount structure to double the output? I would like to build something like this but I would need accurate and complete list of things involved
Magnets itswlfs would just act as a flywhell but when you would add coils it would generate resistance and i doubt efficiency would be good much better to make transmission from the shaft onto the generator
gonna try this soon
maybe not with something that big, but i'm wondering if you have the vertical squirl cage design if you could have a top and bottom magnet bearing. or how about a magnet bearing using 3 magnets with the center one mounted to the rotor with the top magnet could attract up to carry more load or maye repel down for stabilithy ---- then have a set top and bottom.
I wonder if you placed a wing inside and kept it orientated in direction of the wind if you could control how the air flows over the blades
I wonder if you could get that cost down by using a slow speed generator, using a big wheel to mount arms on it. At the end of each arm would be mounted a giant bamboo half to catch the wind like a cup. And you could have a few of these mounted on the wheel for a vertical wind turbine. While using air scoops to speed it up or that funnels air to the wind turbine. ?
I was wondering if stronger magnets like industrial graded magnets would yeild more power or make the whole set up more unstable?
This is definitely a worthwhile project. I was just watching some industrial roof vents that were very close to the same design and proportions except they had a dome on top instead of a flat surface and I suspect that this is an aerodynamic feature and not just for appearance, maybe someone who knows about aerodynamics could comment.
I did a video on converting one of those to a turbine
Actually it is nothing of the sort. You will not even break even on it.
I want to learn this concept. This is amazing. Do you have any reference for the same. Please do the needful.
Interesting. How much noise will this produce cmpared to a horisontal three-blade turbine? Noise is usually the biggest issu for place a windturbine. I'm ging to build a new garage and placing a system of vertikal windturbines would absolutely be somthing I would be considering. Needs a double roof to protekt the windturbindes from snow. Also placement of a radial windturbine into a venturi could be interesting to try. We almost always have wind, but combining several small turbines with a battery solution...
got good bons success there family
Awsome Robert.
cheers mate
I wonder if a partial shroud to shield the negative side of the turbine would work, could us a wind vane to keep it oriented for changing winds.
I hope your pick up coils are bifilar. That way you can elimate the cogging by buck boosting the additional coil by shorting or variable capacitor, tuning for a phase angle shift so both peaks align. Anyway more wattage due to less resistance ...even though twice the weight in copper if circuit design was proper ,one could get 360watt horsepower.
What's a watt horsepower?
Brilliant. Only thing I might suggest is using at least two of your vertical arms at 90-degrees to stabilize it. You motioned like you were only putting in one. With two, you'd get front-back *plus* left-right stability. With 3, you'd get the benefit of a tripod, more even forces transferred to your ground plane.
cheers mate
So have you measured the torque? Speed is fine, but TORQUE is a vital necessity in wind generation devices. A small suggestion; If you made the blades much bigger, and blocked the wind from the up-wind side, you would create lots more torque. The blocking wall would turn with the direction the wind blew, so the wind could not blow the blades backwards, and rob you of torque.
Nicely diplomatic Jack.
Otherwise what a humongous waste of time and resource for what will be a truly puny output;
It has **far** too many blades for a start. It will work as a wind blocking device - you **have** to let the wind blow through the thing. It would make an epic fan though, as per what's buried in the dash of most cars.
So why not just use 3 blades, a little more plastic for a tail and use the bearings so it can follow the wind.
Thus using a fraction of the materials, a fraction of the time to build, an off-the-shelf motor as its dynamo, much greater reliability and get 10 times more electricity out of it
This is the kind of public education that deserves government funding
FtG
Keep the government out of it. Keep it Open Source.
that is a nice thing to say mate - cheers
Too bad we have smart everything today except smart governments. Too bad the United Management Body Of Planet Earth still doesn't exist. What a dystopian ineptness.
They'd ruin it somehow ... 😂🤣
Looking good 👍👍👍
Thank you! Cheers!
How did you keep the slats / blade symmetrical so well
The alignment of the sides could be adjusted with metal wire under tension. Similar to bike wheel spokes.
nice idea mate - cheers
Beautiful Bernard
Thank you! Cheers!
@@ThinkingandTinkering Morning Rob Imagine How That Would Look With Red , Green And Blue LED's Spinning @ High Speed
Bless Up Earthling
I could see 3d printing small bracket/receivers for the blade end mounts, slow, but good repetitive work for the printer.
have u tried with curved blades to see if that works better?
Hi Robert, I keep wondering whether it might be better to cut curved slots in the discs to house the ends of the blades. The blades could then be glued into the discs
He seems to err towards simplicity. There's a lot of opportunity to make an errant cut with what you suggested, even though it would be more sturdy. If you have the skills$equipment, go for it. Just pay attention to detail
Thanks
I am a old wood worker
So your chop saw m8
Can cut perfect circles !
Sink the saw into large bench , i use a hatch and drop suported below so when not in use easy to remove !
Position saw and work peice , large circles saw at 45
Use a screw in center of circle to spin the work peice and start choping , you will get to a point where you hold the saw down and finely trim perfect circles, shure you can fill in the gaps of my explanation, your not daft!! , you can use the setup to index very accurately as well and so on , like drilling or edge details ect
I have been watching a lot of wind turbine videos. My question is if you mount the turbine with a tail so it will rotate. If you block off 1/2 the blades that would cause drag on the system would it not this turbine to work better. I am thinking sort of like a water wheel.
Please excuse my ignorance, but can the voltage (inverted) just go to the grid (using a meter)? I couldn't go the work of storing and using the power, so can't I just sell it to the National Grid (if I built a big one...or four)?
Damned impressive seeing your design spin so well Sir! Onto #3 🤟 🤠 🤞
Great build.. Would filling the center increase wind speed around the windmill? Just a thought that maybe some wind is traveling through the center and not being harnessed. I wonder if funneling the wind would increase the pressure on the blades and increase the speed.
I would have thought so mate
Hello Robert, can you give information about noise levels? It's important in a urban area to have this in consideration in my opinion. Thank you for all your sharing of knowledge. Not just on this project, on all your videos. Thank you!
I don't know right now. mate - but I guess I will see
@@ThinkingandTinkering Thank you!
sir,is it worth more energy efficient than electricity generated from solar panel ?
Love it, looking grest. How many microwave transformers do you plan on using under the base plate after fixing the magnets?
to behest mate - I am not sure - I will start with one and see how it goes
@@ThinkingandTinkering I would be starting with 4. 2 parallel 2 series, double both voltage and current.
Use a smaller radius on the wheel for the magnets. This adds torque for the magnets to pass the coils. Looks good though. Looks very balanced.
to be honest mate - I am astounded about how well it is balanced and quite honestly this has nothing to do with me - I just stuck the chair legs on the pipe and it worked!
Look up water studios Parthenon.
I had thought of that with about 20 foot vertical wind turbines forming the top portion (and 30 foot wave turbines underneath), with slotted recurve wave walls and slotted rock armor that would stagger out for more or less a mile like a spider web rice patty with each ring about 5 feet lower than the previous, that would greatly reduce large waves before it even got to the 20 foot wall, all the while generating power from water, wind, and solar on top of each portion of the vertical wind turbine top ring.
I thought it would be made out of graphene concrete and graphene plastic or carbon fiber or steel. Each ring would be about the width of a 2, 4, or 8 lane highway.
The inner circle would have relatively calm water, and the air “should” be calmer. You can have a more central proportion that would close like a Huge stadium roof (hurricanes)
What I’m Really curious is how it would fair in Really Rough Seas like a Hurricane.
I thought of the interior, and exterior you could grow algae for oil in bags like kelp. That way you could grow oil, you would have all renewables as your Wall, and you could generate hydrogen and transport it to the mainland. Besides having a floating city in the middle where everyone could live and work, and you could have floating hotels for people to visit and see everything up close in comfort
Hi Robert, be interesting to know how any air entering the turbine will exit it, usually a sqirrel caged fan is a p shaped housing to control the flow of air, I assume the blades approaching the wind direction will cause resistance, you say that you are adding a support that wraps around to the shaft at the top, if you fitted a baffle that shaded the portion of the turbine approaching the wind, and then put independent bearings on it with a directional weather vane that turned it to the prevailing wind, also any air entering the centre has to exit somewhere, if it's through the blades on the approach that will counteract the rotation, if the top was open the air could escape, combined with the baffle and oriented in the right direction a close fitting cowling with a conical aperture in the lea of the wind would create negative pressure and assist the airflow ?
Got me thinking again thanks rooby
nice ideas mate - got me thinking too - cheers
Would a flywheel at the base increase your output?
What happens if you turn it such that the main shaft is horizontal?
Fantastic recycled achievement, I can’t wait for your attachment of the magnets and solenoids. And then when you rearrange them for better performance.
Awesome economic initiate, looks very light weight..
I will weigh it once the magnets are on mate
Robert Murray-Smith Good morning. I was thinking that you could recycle strong magnets from old computer hard drives. They are found in lots of stuff, old sky boxes and old game consoles, the slow ones. I have often tried to imagine how to repurpose these delicate items. It’s all about Confidence 👍
You got my vote mate, I love it thus far. I don't think there is a whole lot I would had done differently. You have done a spot on job mate. The office chairs was a bonus and great idea, those bearings should last a good while. I mean I'm sitting here trying to think up something that you might want to do and the only thing I can come up with is extending the blades inward maybe. I mean really not needed as we all see that it is turning very good but it is a thought just in case you were wanting more thrust. I mean WOW it is already turning very smoothly. This is going to be awesome once you get those magnets added. We need England to go ahead and fund you so you can buy those good Neo N52 magnets. How much is it weighing as is? I'm guessing a good 35 pounds or so.
that's a good guess mate - I haven't weighed it yet but I can pick it up easily so it is well less than 50lbs - I do a fair bit of building so I am used to shifting 50lbs sacks so I know what they feel like lol
@@ThinkingandTinkering Those magnets are going to put on the weight. That is one reason I bought 3/4" x 3/4" n52 neo magnets. They are plenty powerful but doable on the weight end of the scale. For something about the size of what you have built here, I would say you would need the amount that I bought, which is around 60 of the 3/4" x 3/4" n52 neo's. If you bought them, look on the bright side, they can be reused if you use plastic tube holders. Which you and I can build out of scrap material lying around, lol - They are worth the investment that is for sure. They real perform really well on generators and motors. That is why I have been working towards putting both all in one device.
@@ThinkingandTinkering Also I did think of an idea to help you with weight issues with magnets. What if you epoxied each magnet, then you could screw them on and off as needed when moving the generator from one location to the next and could still be used on other projects being tested along the way. It would mean a lot of screwing but sure would save the back for sure mate.
@@jasonwitt8619 they are good. mate that's for sure - but it isn't a weight issue I am trying for budget build - if I can't get the output I need I might upgrade to Neos but right now I don't want to add the expense on there
@@ThinkingandTinkering I can definitely understand that part for sure, I'm always on a budget, LOL so that I might have the money to go all in on a project , LOL but I do understand wanting to keep it as cheap as possible.
Nice video. Although, given the swept area and a relatively inefficient collector I don't see it producing 1kW at any reasonable wind velocity.
Hi Robert, have you tried using the coil without the metal casing? I wonder what would be the difference with and without. I seen tutorials on home made axial generators and they only had plain coils. It looks great.
I did mate - but in a different version - I could try it with this easily enough so will do
Certain washing machines have axial flux motors built in. They also have SUBSTANTIAL mounting/bearing bosses with meaty, beefy bearings as standard, designed to take VERY high radial inertial loads ... A 9kg load spinning at 1200 rpm ... Is a LOT of inertial load!
The biggest problems you are likely to face are:
1. Finding a suitable direct drive washer, nowhere near as common as standard universal motor. Look for good German makes.
2. Being able to dismantle & cut the outer drum away sufficiently but keeping sufficient material to use as a mounting. Alternatively, cutting the hub away completely from the outer drum is often an option.
3. If the washer is scrap due to worn or seized bearings then the biggest issue is gaining sufficient access to be able to remove BOTH inner and outer bearings and replace them with new. It's doable with the right tools and technique but often it takes a LONG time due to greasy gunk, gunge, rust, and all round general filth especially around the bearing water seals - yuck!
Even if not used for this kind of project it's worth it to just get at the direct drive motor (used as an alternator) and removing the hub completely to work at on the bench and used for any project having to handle large radial and moderate axial loads.
Access to a decent sized lathe gives MUCH flexibility in altering the diameter of the bearing seats in the hub to take different style bearings, like even beefier or larger bearings. Originals may be a non standard size so changing bearing seats can give access to much cheaper, more easily obtained bearings from Ali Express (great low cost source, albeit slow to get ... 2-6 weeks).
From personal experience I'd say ALWAYS use xxxx-RS or -2RS (RS = rubber sealed) and not -ZZ (steel sealed) as they are well worth the miniscule difference in price (pennies) and the slightly less operational efficiency due to the rubber sealing friction but MUCH longer life in dusty/damp/external environments (VAWT).
I've pulled apart many washers and tumble driers (good source of reversible synchronous motors!) and it's not just the motor that's of value:
Lots of useful parts like temp sensors, heating element, general flex wire, heavy duty springs, tube sealing spring clips, vibration dampers, switches, water valves, relays, triacs, thyristors, other electronic components.
But the biggest, often ignored pieces are the large area enamelled/galvanised FLAT steel panels easily cut out with a steel cutting disk on an angle grinder - brilliant for all sorts of things like magnetic white boards (!!), Cutting further, bending into custom size steel project boxes & enclosures, creating other structural pieces, large sheet galvanised side up tops to protect your work bench top when doing metalwork. The list is almost endless.
Marvelous! If you put the magnets on the bottom, would there be a limit to the number of MOT coils you use? (Thinking higher voltage or current from series-paralleling the coils... :-) )
every time you add something you raise the wind speed needed to get it going mate - so like most things there will be a balance
How much this turbine can generate and at what wind velocity?
Robert, why not use opposing magnets to take the axial load off the mainshaft bearings?
no reason mate - it's an awesome idea and grand passed also suggested it - I was thinking of trying it for sure
You are amazing sir... am your new student.
HEY,
make a big one of those using the new bi-facial solar panels as your blades.
That reminds me of Joe 90. 🎶🎶
Have you considered shading half the returning blades with a cowl using a tail fin to turn it into the wind
no mate - but nice tip cheers