1482 A Diy Super Efficient (93% Efficient) Wind Turbine

[josephpk]

Absolutely love people's creativity when it comes to design - had a full Eureka moment when your sub mentioned using a cone.

[martindare]

A fixed (non rotating) cone would reduce rotating mass and offer performance improvement. Boundary layer effect will cause the air to rotate at the surface of the cone robbing energy from the blades (spoons).

Think jet engines .. .

[jamesross]

Also, an update on the wind turbine with a bowl rather than a cone. I found what I believe is a very good shape for the cone replacement. The bottom half of an plastic easter egg. The giant hollow eggs that pop apart so you can fill them with stuffed animals, toys, candy, ect. It appears to be very well shaped for this application. It's not too pointed nor too shallow, yet also not a perfect half sphere(a full half sphere would cause crosswinds to not flow across properly). Two of those and you can make a back to back turbine for almost full wind range. Cheap and maybe even free if you know someone that has kids around easter time. Just a thought.

[MarceloVittorio]

You can twist the cone, creating micro blades on it as a orange squeezer, adding efficiency to the construction. I think some folds on the sheet brings you the result.

[owainwinfield]

Love this. Having this as a ducted fan would create a further increase wind speed over the spoons. also having the ducting around the spoons extend beyond the spoons a reasonable distance with a cone on the back would ease drag behind the blades and also improve negative presure behind the blade to help pull air through the blades. I reckon this set up would work well as small sale hydro with low head water if housed inside a pip

[Spartan]

I would very much like to use this eventually. its so simple and brilliant thank you!

[ColRubyDimplesManacha]

This is awesome! Thanks Robert and Dave W!

[MacsMachines]

Rob loving your videos as ever 👍👍Could you also put an inverse cone around the outside of the spoons (like a splayed out collar to channel more air into the blades that either would have been thrown beyond them with the cone or just missed all together due to its basic footprint? - a wind power multiplier if you like?

[vossierebel]

With a huff and a puff... you're gonna change the world!!👍😁

[ourhouseisfull]

Thanks. You gave me some great ideas to try out.

[nathansellers]

Wow, this is definitely one of my favorite videos Rob!

[MysticMCWizard]

Found this video interesing and believe that it can be improved on quite easily.
By introducing the cone you have increased the efficiency by directing the air towards the spoons, however you are also introducing a drag coefficient by having the cone also rotating on the axis being attached to the spoons. I say this because when the pressure of the air hits the cone the rotational surface friction is trying to change the direction of the air flow perpendicular to the direction of travel. (The same surface friction caused by air pressure that is used to power the tesla turbine in an air powered version). In this design I would still adopt a cone to direct the air for greater air pressure on the spoons, but I would have the cone stationary and not attached to the spoons. Then I would aso add some short vanes to the edge of the cone to help guide the air into the spoon faces again to improve efficiency.
Another loss is introduced by the added weight of the turbine by attaching the cone as you are also having the use available energy to rotate this mass. The increased weight will also add friction to the bearings.
Now, combining this design with the low friction magnetic bearing you shared would also greatly improve efficiency in the system. This would then allow a greater amount of the air pressure applied to the spoons to be utilised and converted into usable electrical energy The only negative impacts in the system would then be the air friction on the spoons and the back emf caused when the magnets are passing through the coils. As we are minimising any losses that are found elsewhere in the system.
This is from what I can imagine is happening in this system.
I hope this is all something to consider if you fancy doing an upgrade video on this subject. 😎 👍
Your thoughts on this would be greatly appreciated.

[jimparsons]

Liked the video. Back in the day, many jets had cone shaped structures on their respective intakes. Maybe that is where the viewer that commented on the orginal show got their idea? A pretty good demonstration, though.

[lIII]

I think if you ducted more wind in using a large cowling on the outside of the turbine to duct even more wind in, perhaps we could best the Betz limit? Then again, that might be cheeting. :)

[victoryfirst]

This video has the best information on wind turbine.

[Cooliemasteroz]

I wonder if a fixed cone on the other side would also help. You might be able to replace some of the vertical wooden section with a flat piece of 6mm steel so that you only need to cut a narrow slot in the cone.
This one can evolve a lot, I keep thinking of more things like putting the hole thing in a tube with reversed cones to catch more air take and take advantage of the Venturi effect.

[OMIF]

Well, aside from directing the wind to spoons working bit, it also eliminates the drag introduced but the non-working handle areas. :) Pretty cool use of plastic spoons.

[cwt]

Definitely way to go.... even an off-the-shelf plastic bowl would give a worthwhile improvement as they are nicely radiused at the rim.

[skpkl]

It would be cool to have multipple turbines like this mounted to an array or a structure that could potentialy make them more efficient individually. Maybe a spinning structure... Maybe parabolic shaped or spherical/pyramidal array. Maybe an array with "wind guides" or a giant funel... Vortex funnel or vortex windguide... Lots of ideas here.

[dahabitmedi]

nice work, it's my lucky day to meet you