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foreign video 1798 we built this thing which is our Thunderbolt wind turbine now it is in fact a new grinsky Serpentine turbine but we're calling it a Thunderball because of the bulk construction and it does so well whenever you do something like this the first thing you get asked is okay so what is its output and everyone really said but I'm going to tell you right now the output of this little machine that we built for peanuts is a kilowatt hour and I'm quite proud of that the output is one kilowatt hour in case you didn't hear me one kilowatt hour is the output foot of this machine now you might think I'm a little mad by saying that because it's bolts and wire and something that I've printed up and you could make it out of bean cans if you want and to a degree I am a little bit mad but have a look at this this is a Chinese wind turbine and you can see in bright bold red it is a two kilowatt hour turbine for only a thousand pounds rather than stand by itself there's quite a lot of these on eBay actually and being sold all over the place this has been up a week it's stopped four to seven they've sold three of them so they're selling them hand over fist at two kilowatt hours and they could make a kilowatt hour for next to nothing but they're selling these at two kilowatt hour now you might think oh hey that's a Chinese product but what about this one this is an all British product and it is a one kilowatt hour turbine and you can see that it is one kilowatt hour the Chinese version is two kilowatt hour and my version is one kilowatt hour and I'm answering the question you asked what is the output well that's the output I am however and you may be well aware of this I'm lying to you I'm lying to you in a completely truthful way I'm lying to you because I'm answering the question you asked but of course I'm not giving you all the information you need and I'm doing it in exactly the same way that the Chinese one did and I'm doing it in exactly the same way as the British one did all of the wind industry does this don't do it because they're horrible sneaky people trying to rob you of your books they do it because everybody everybody asks how much does it output and they don't think about it they just ask that question they get told the answer and they go oh hey well it does have two kilowatts on the box I'd better buy it there's gonna be an awful lot of disappointed people and if you make this and expect a kilowatt hour out of it you're probably going to be disappointed too but again you only there's a kilowatt hour wind turbine as that one is genuinely a two kilowatt hour and this one is genuinely a one kilowatt hour wind turbine that's the output what you're missing is the input you don't know what the input wind speed is now you can get the input wind speeds because they tell you about this stuff they tell you that the rated wind speed of this one is 11 meters per second down this one is 12.5 meters per second and we can calculate from the area what the output will be at that given wind speed so if we take this one the Chinese one we look at the height and diameter of it and we go to a calculator and my favorite is Omni calculator and we put those dimensions in with that wind speed we'll find that the energy contending the wind is in fact only 800 watts and that seems like a huge disparity does it not because you forget you think that a wind turbine outputs power and it doesn't a wind turbine converts wind energy into rotary energy into electrical energy the wind turbine doesn't make anything it converts things and so when you realize that then you ask the question okay how much input can it actually have and then how efficient is it converting it now it turns out most wind turbines actually around about 30 efficient that makes sense if you think about it because of course you've got the bets limit which is uh what 59.3 percent more or less 60 to only 60 of the wind energy at most can be pulled out of a blowing wind so they're never going to be more than 59.3 division then we've got other losses involved so it turns out that the conversion of the available wind energy to electrical energy is round about 30 percent even if the turbine itself is 80 90 efficient the overall conversion is going to be around about 30 percent efficient or so for just about every wind turbine there is that means we don't get a lot out so if we put those dimensions in at that wind speed we know that it's going to be about 800 watts available and the output is going to be about 230 Watts or so that seems terribly disappointing and the same is actually true for every single wind turbine there's a slightly different trick played on you though because if we look at the volticon wind turbine and we put those figures in blade length and wind speed because it's a hawt and we see that they read theirs at 12.5 meters per second that actually is round about an output of a kilowatt so we're getting in the British version and an output that seems reasonable really the Chinese version then we're getting a ludicrous output but you've got to ask yourself what do these simple figures actually mean because they're usually quarter to meters per second that's how you could raise and the quarter millimeters sorry meters per second and that's because the number is smaller that's it you're just reading a smaller number what does 11 and 12.5 meters per second mean well there's a scale available called the Beaufort scale and the Beaufort scale will tell you that 12.5 meters per second is in fact 28 miles per hour or 25 knots if you look at up on the scale you see there is in fact near Gale conditions so on the British one which is the 12.5 meters per second we will get their rated output if we take that wind turbine out in near Gale we have to have a gale blowing before it will actually output what it says it is now management speed in the UK and it is a UK company it's something like I I think it's 3.8 no 7.8 knots which is 3.9 meters per second now 3.9 meters per second that wind turbine that proudly tells you is a kilowatt is in fact going to produce about 200 Watts or so they're allowed to say it's a kilowatt hour wind turbine because I haven't told you what the input is and it's completely permissible because if you put in a near Gale you'll get a kilowatt hour out awesome so it's a kilowatt hour turbine on the other one the Chinese one if we calculate those figures we can see what we have in fact what we need to get two kilowatts out of that turbine is to put it in wind conditions of violent storm violent storm is the one less than the hurricane so we take that wind turbine out into a violent storm we'll get two kilowatt hours so it's kind of the truth the output is two kilowatts the Apple D is one kilowatts the output is one kilowatt it's kind of the truth but it's half a truth because I haven't told you what the input is maybe the input is um in the Chinese condition violent storm in the UK near Gale and for mine hurricane then we will get those kind of outputs they're only there to me okay how much is that output oh it's a kilowatt hour it hurt again I just missed that input bit off and you've got yourself a kilowatt hour generator you might think that's a real trick and it is a real trick but it is a completely permissible trick that pervades the entire wind industry whether it's from China Britain or America doesn't matter they're all doing the same thing they're telling you these wind speeds in meters per second because it's nice and low they're not telling you what the Beaufort scale actually means what that wind speed actually is and they work out the output from a wind speed that basically suits them so they can put it on the box and all of that is true completely true completely permissible completely allowed and people buy it hand over fist like I said they don't do this because they're horrible people they do this because they're answering the question we all ask how much does it output well that's a kilowatt hour I've just told you both the truth and the lie in the same breath if I miss out the input then you're not going to know if you go about products you won't ask that question normally people on the on YouTube do ask that ask that question and say you know okay so what's the input but surprisingly enough when it comes to buying this thing nobody actually asks that question and you know that because these things sell people are buying this based on what is printed on the box when it's pretty obvious to see from the dimensions in a quick calculator then in fact it couldn't possibly do that unless you stick it in a hurricane so they're telling you the truth but only half a truth and that half truth is getting you to buy into these things because you're being told what you've been asked and you do that because you think that these things make electricity they don't make electricity they convert wind energy into mechanical energy and mechanical energy into electricity they're not producing they're converting so it might seem like a bit of a hair split to you but actually that hair splitting makes a very big difference in how you see these things and then how confusing their mind be if you see it as a converter as instead of a producer you're bound to ask the question okay how much is it being put in and how efficient are they at converting it to the out and those are the correct questions to ask of any wind turbine how much does it output really just show those you don't know what you're asking and I hate to be rude about that you don't anyway hopefully that helped clear up some of the um confusion let's be kind let's call it confusion yes hopefully that clears up some of the confusions about wind turbines and what it means when they say a two kilowatt a one kilowatt or a one kilowatt turbine hope you enjoyed the video hope it helped thank you very much for watching and please do remember to like And subscribe