WIND TURBINE BLADE DIY how to video Part 6 HAWT Windmill

[mightyhorserocks]

Your making a propeller blade and a AirPlanes a flying by.

[gracekennyblogg]

WIndy season has come and gone. Great videos, just found you, but seems like I can build it but can't learn how to hook it up and get electricity. Please , vid 7 and maybe a connect for your solar pannels too. Keep up the good work.

[Zombiepigman96]

I really like your vids.

[jovanport]

you have to put glue on it before you put them together

[dicelockdown]

its dangerous to pull the piece backwards through the saw.

[tonymac96]

Hey, your wife was not in any of these videos !!!! ...I hope she is doing fine..you guys make a great couple. I wish my wife will help me a little bit around the shop...Good videos!!! ...With a windmill of this size what will be energy output for a a 10 mile/hr wind ? Thanks

[dragossorin85]

perfect video.......but where is part 7?

[otherpower]

Interesting videos. There are lots of ways to harness energy from the wind. I wonder why you come up with a very steep 20 deg. pitch on the blades. For a blade like that, with no twist or taper, I should think something like 5 deg would be more efficient. A more streamlined 'airfoil' shape would help some too I expect.

[tedifer123]

buy a router

[ederangelo21]

Mr, and part 7 ? You machine not is work, pleasy conect and show here working !

[shartne]

So where is Part 7??? I want to see your generator.

[lloyd21964]

I just watched all 6 videos, not because I needed to, but because the instant that you set that blade I thought to myself that I have been knowing this since we used to make air drive props for use in the marsh as kids. I watched all six and really think you did a great job.

[Gruurk2]

Use a mallet when you put the two blades together instead of using a board. Also you might want to round the leading edge of the blade and make the trailing edge more tapered. That should increase the efficient of the overall blade by creating airfoil. If you leave the blade rough then it will reduce the efficiency quite a bit. If you want you can do some experiments on this to see. Overall, what was shown was pretty sweet.

[gb072007]

Any way to convert the building process for non-electric tools (hand saw ..) ?

I am a little concerned about safety .

[BerndtTost]

@gb072007 I've done this sort of work with hand tools. Tools you might use would include hand saws (rip, cross cut, and tenon), mallet, chisels, plane (jack or smoothing), spokeshave, marking guage, combination square, a solid work bench, couple of saw horses. You'll also need plenty of time and a good eye for straight cutting. Don't forget to wear safety goggles.

[gb072007]

@BerndtTost Sounds cool. Thanks .

[miocene22]

Your angle will depend on the tip speed ratio. For small turbines a tip speed ratio of around 10 is pretty efficient. Then use the equation twist angle=atan[(2R)/(3r*lambda)] - alpha where alpha is the angle of attack of the aerofoil, R is the blade radius and r is the distance along the blade.

[miocene22]

that's some pretty primitive aerodynamics. You should try and make an aerofoil from and the blade should ideally twist so the blade is flatter at the tip and more angled at the root. Also, to limit drag the width of the blade should narrow towards the tip.

[cosmicseed]

definitely should stress in the video to not use deck screws because of the horrible shear strength. You already realize tht, but maybe re-uploading video 5 with tht as a disclaimer would be a good idea. One would hope anyone taking on this proj would kno tht already however.

[crm8647]

I cant believe this guy still has fingers and I love the way he beats and pokes at the wood with a file LOL

[1rootle]

nice work, thanks

[krrrruptidsoless]

How about just making them out of styrofoam form fiberglass covered.

[railrunner18]

just as a suggestion (this isnt a huge deal, but would add a tad bit more structural strength considering the size of the blades) you should put 2 screws in one side and 2 in the other (at diagonals. just makes a slightly better center. otherwise, pretty awesome blade setup!

[xollst]

It would be much safer using dado blades to make the half lap joint you used there, as you mentioned. Its dangerous to go back and fourth, and side to side, on a table saw.

But you're not using an industrial shop saw, and I suppose if they are going to have access to those, then they should know that anyhow!

Also, what 1krr said about the blades. It can be much harder to achieve good balance and consistency when you make them into aerofoils, but the end result will be much much more efficient

[allalan]

Love the windmill and the 1960's

(hippie van?)

[1krr]

Looks like a fun project. Having built a few, if I may make a couple observations: for an 8 foot turbine, you will probably find you get more efficient production from a wider blade (2x8 rather than a 2x4) and changing from a simple deflection drag style blade to a true airfoil. There isn't much cost difference in the raw material and with a bit more work carving the blades into an airfoil, I think you will see even better results. Anyway, great vids! Thanks for posting.

[Pajes01]

great vid man! cheers!

I would love to see it all properly bog'd n sanded though.

I would think the aerodynamics would make a significant difference.

Would also love to see you attach it to a rig with a generator to compete the project. :)

Thanks much!

[bhaydenca]

I would also like to see the mill working and see how many watts it can produce. NEED A 7TH VIDEO :) I await

[zeekwolfe]

This man's grasp of aerodynamics is primitive. The open, rough saw cuts of the finished blade do not look good. A little more attention to detail, but with no additional cost, would make something more pleasing to look at, and more efficient in doing useful work.

[cromagnon777]

Really good work, especially the safety instructions super.greetings from Germany.

[58belvedere]

your (this) for your tablesaw is called a miter guage! where was you at that day in woodshop? hahaha lol

[rellirTnoraa1]

Could you use 2x6 so that it has more suffice aria to catch the wind

[Freedom3777]

Where is video 7!?

I want to see it all together producing electricity.

Great videos by the way, but I love to see it compleat and know about how many watts you are getting out of yours.

[GREENPOWERSCIENCE]

Waiting for the windy season. Florida is still air:-)

When we get a chance we are going to the beach for wind.

[england5050]

could just find a proper mill instead of doing the work on a table saw...

[atmac0]

wheres the fun in that?

[mssharke]

Hi. Could you please tell me what kind of wood you recommend as the favourable type.I was wondering about cedar.Or is a hardwood better?Please let me know.Fantastic videos by the way.Your videos are the only ones I have been able to make any sense of and I sincerely appreciate you posting them!

[whitetail54]

I made your blades they work great ,thanks

[ThisIsMySockAccount]

At 9:05 you should have put an annotation saying "You are here!" (X marks the spot)

[anasynpunk]

Would anyone recommend checking for balance after these cuts or would the difference be too small to justify?

[grimnavyseal]

great job!!! looks amazing, how well did it do when you put the whole set together?

[raphamar80]

great work !

Im planing to use solar and wind energie to power my farm, and help my neighbours in brasil !!

Live forever Apes !!

Great job !!

[sjh7132]

You guys have shown some interesting and creative approaches to making wind devices. (used air conditioning fans, homemade vawt, etc) I was wondering if you could tell us how well they work. How much power in what speed wind do you see?

[bowakowa]

Hey Dan, I watch all the time, and I admire your attitude. I gotta tell ya buddy, I think you need a table router. They're not too much, and you'd get some easier and safer results for relief cutting.

[boatbuilder1]

This is only for cosmetic value right? it should not make any differerence in the way it functions.

[GREENPOWERSCIENCE]

It makes it stronger. If you skip this step use 1/4" steel bolts. Screws have a poor shear strength. Glue too.

[tonyb24242424]

i dont no were u get ur ideas but it is increadible

[GREENPOWERSCIENCE]

:-) Thank You.

[xlioilx]

why dont you just buy a cheep industrial fan blade off the internet.

This looks very flimsy and too thin to catch any wind

[GREENPOWERSCIENCE]

They are too small and cost about $300 for a 5' fan blade. These are very strong and will hold up to 50+MPH if mounted correctly.

[xlioilx]

Thats crazy, I'm sure you could find one out of an old car of something in a junk yard for a few bucks.. Anyhow not everyone has power tools to build a wind factory. just a suggestion

[sc6chuck9]

yes but those of us who do have the tools to do this stuff with thank him for the ideas and direction that we sometime lack.

[CaberFeidh]

A car with an 8' fan, that is a concept.

One sometimes wonders what inspires people to post somethings so completely without thought.

Great work GreenPower. Enjoyed it allot. Had my doubts back at beginning of part 1. A man after my own heart, avoids handtools at all cost!

[xlioilx]

well you wouldn't need 8 feet for a wind turbine in the first place. the commercial ones for homes are about the size of a standard barn side fan blade

[CaberFeidh]

Electricity produced is a direct product of the energy input, specifically the amount of force on the blades. A shorter foil will have to have a greater cord to produce the same energy. A high aspect airfoil is more directionally stable than a low aspect foil. An unstable turbine would have a tendency to react to any little change in airflow.High aspect=more low speed lift. Low aspect foils create higher turbulence (read drag). there is a reason aircraft props don't look like boat props.

[hexagononsaturn]

Thanks for your hard work and spreading inspiration~

[bogdy72000]

quite nice

[enyceckk101]

The weather over there looks so nice

[blueghist]

I was wondering why you didn't do that the last video, much better.

A Dado blade helps a lot but most people don't have one.

Great video series, Thanks for the great Ideas so much. :)

[sockpuppetsfromhell]

Go go gorilla snot (gorilla glue).

[livehazelgreentraffi]

Great Video!!

A couple of recommendations that might help

You can use a quick clamp to hold the board to the guide to keep your hands free and clear from the blade when cutting.

If you mark the cuts so that they are 1 inch apart it would be easy to cut out the debris with a sharp 1 inch chisel or a good quality hack saw might do the trick as well.