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Sailboats and land yachts are interesting. On a beam reach you can certainly sail faster than the wind, but essentially perpendicular to the wind vector.
I think this contraption can go faster than the wind for a few moments but that would be it.
Now, what I'm less sure about is whether you can sail into the wind faster than the wind.
He even shows a clear close-up image of the exposed gear assembly. It shows that the whole system is purely mechanical.His transparency brings credibility.The ratio of the gears seems to be 1:1 So the speed multiplier must come from wheels radii vs blades radii, and also blades angle.
Quote from: Bored chemist on 15/06/2021 22:28:55Now, what I'm less sure about is whether you can sail into the wind faster than the wind.Yes you can, and for upwind travel the rotor acts as a windmill. But in the downwind faster than wind case it's a propeller.This vehicle did both:- It went 2.8x windspeed directly downwind- it went 2.1x windpseed directly upwind
Then Coco from the video would be right: It can't work at all. It would slide or lock or break.
Quote from: MarkV on 25/06/2021 03:09:12Then Coco from the video would be right: It can't work at all. It would slide or lock or break.In my diagram, one of the conveyors is slippery. Nothing has to break.
What does it take to move in reverse direction?
What does it take to make it move slower than the wind?
Quote from: Bored chemist on 17/06/2021 11:07:37I can lean out of the basket and put the wheel in contact with the ground so it spins the generator and creates electricity.I can use that electricity to run a motor and have that drive a propeller and I can use that to move my balloon through the air in any direction I choose.That wheel on the ground will be a big drag and slow you down considerably. Since the generator and the motor are not 100% efficient (the propeller is not 100% efficient either) I do not think that you will be able to even make it back up to your speed before you lowered the wheel.
I can lean out of the basket and put the wheel in contact with the ground so it spins the generator and creates electricity.I can use that electricity to run a motor and have that drive a propeller and I can use that to move my balloon through the air in any direction I choose.
Quote from: hamdani yusuf on 25/06/2021 13:57:12What does it take to make it move slower than the wind? For this the advance ratio A must be negative, so you have to get rid of the blue wheel or apply the ruler at the bottom of the blue wheel.
Quote from: MarkV on 25/06/2021 17:35:32Quote from: hamdani yusuf on 25/06/2021 13:57:12What does it take to make it move slower than the wind? For this the advance ratio A must be negative, so you have to get rid of the blue wheel or apply the ruler at the bottom of the blue wheel.My analysis shows that to go faster than the wind,...
... the bottom wheels must spin in reverse direction than the top.
//www.youtube.com/watch?v=jyQwgBAaBag [nofollow]
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