Thanks for the demo, I knew it was possible for something with a turbine driving geared wheels on land, but my physics is too rusty to calculate a water/air drive system. For those who think it is perpetual motion, think of a sailing boat making ground against the wind by tacking.
@sdganj2009 Think of it this way, each windmill blade is the same as a sail beating to windward. The windmill blades don't go directly into the wind - they are going at 45 degrees to the wind!
The principle that makes this work is very simple. Wind speed is greater at higher altitude, even twenty or thirty feet higher in the case of sailing, or in this case inches higher. Thus, the marine propellor speed benefits from the increased windspeed turning the windmill. Since the boat itself is low, the wind drag will be less because of the decreased windspeed at the waterline.
@sdganj2009 Hi, I'm the builder. The clothespins and cord across the tank are to keep the shaft inline, otherwise the front prop starts to bang against the side of the tank. The "black bar" is the tube I used to fill the tank with water. Check out the the other videos on my channel and read the articles in the website, then you will understand better - website is sailwingsdotnet thanks
I find this fascinating and counter intuitive but a great thing to know. Its also such a simple and great direct drive system! your water propeller is interesting too. did you use the long bladed water propeller because of calculations or just because you had it lying around - looks like a toy airplane propeller ? would a smaller more traditional prop have worked? probably;y not. also would be interesting to hook the wind prop to a side our back paddle wheel since supposedly paddle wheels are actually the most efficient force transference to water. u would need a right angle gear though so would suffer some loss there. you know since this works it makes me wonder if a gas dirigible would also work if you balanced the power prop vs the pusher prop correctly and minimized the side drag. of the vehicle. so counter intuitive but then again so is this. also you catamaran could have much faster and sleeker hulls.
The propeller is a model aircraft one. These work most efficiently especially at low speeds. Human powered watercraft use them. The usual type of water prop does not work so well! Those types are probably used because of space constraints. I think the dirigible would work as long as the drag from the envelope was not too much. The frontal area of the gas-bag would be more than the frontal area of a floating hull.
not even reach optimum speed to hold the vessel in place... if it would work it would even have to have a boost to start working...perhaps a stretch in an anchor line but i dont see it...and yes i am very familiar with jacques cousteau's turbosail. ...i sail i let it heel and i run overpowered much of the time its fun... but apparent wind makes sence it allows my dinghy to outrun the wind on a broad reach easy to understand but countering the wind doesnt elsewise my 14ft pintail should pass
спасибо за Ваши наглядные опыты! Согласен, что водный транспорт может двигаться с помощью ветродвигателя (воздушного винта), на встречу ветру. Почему Вы не применили вертикальный ветродвигатель? Его не надо позиционировать по направлению к ветру! С уважением, С
The vertical axis is not suitable. This is because the drag is too much. But with horizontal axis you use blades which are airfoils. Such blades produce much more lift than drag. Up to 50:1 therefore the lift can overcome the drag.
я построил аналогичную конструкцию из 8 лепестков в одной плоскости. Вертится очень хорошо. По моим наблюдениям сопротивление меньше чем у статичных лопастей.
Есть недостаток в вашем проекте. Попробуйте представить эту модель в натуральную величину. И получиться очень большие и опасные винты. Мы пойдём другим путём.
@sdganj2009 It won't reach infinate speed, nor is it perpetual motion. It only works because of the difference in speed between the wind and the water, that is where the power comes from. Therefore you need WIND for it to work. The wind generated by its own motion would not be sufficient to power it.
not sure what those clothespins are or that black bar on bottom at the stern...my dad was a 26 year chemistry and algebra teacher he passed when i was 15 and physics says this cant happen i had ideas of the sort as soon as i learned bernoulli's principle at age5 my dad spoke up quick...bad thing is i dont understand it much more than i did then lol...a fluid flowing over a curved surface creates a low pressure area...aka lower than the bottom side of the foil...friction however reduces input
Hi Nicole, it's not a perpetual motion, it's an energy loss system. If the wind is blowing 10 mph, the boat will not go upwind 10mph. Great thoughts & inquisitiveness!
@ZKMX7 Ok i am starting to think this is very real i just took one of my model airplane props on a rod in front of a fan and surprisingly its backward force was low for its speed spining i think a prop underwater would pull something foward...it is an 11x7.5 (2 blade)...with a different pitch and size perhaps more curve even or more blades will would it acctualy produce lift like a sail and pull forward also?...on a planing vessel how would you keep this from reaching infinate speed?
I take it back Nicole! I think from what I've read, it is possible to go upwind faster than the wind! I don't really understand it but people smarter than me say it's possible
BTW i am 23 and I AM NOT trying to be a punk ass kid...this is perpetual motion basically if it where real we could strap it to anything and unless it had a hullspeed or tremendous drag eficent...using words i cant spell lol...its speed would be infinant...this is like curveing bullets and bending spoons with your mind to me...gearing makes since till you understand there is more friction there but this isnt geared and pitch being greater on drive would make me thing the drive blades would
Thanks for the demo, I knew it was possible for something with a turbine driving geared wheels on land, but my physics is too rusty to calculate a water/air drive system. For those who think it is perpetual motion, think of a sailing boat making ground against the wind by tacking.
@computerssuck100 Please say more. Where is this electromagnet located?
@sdganj2009 Think of it this way, each windmill blade is the same as a sail beating to windward. The windmill blades don't go directly into the wind - they are going at 45 degrees to the wind!
The principle that makes this work is very simple. Wind speed is greater at higher altitude, even twenty or thirty feet higher in the case of sailing, or in this case inches higher. Thus, the marine propellor speed benefits from the increased windspeed turning the windmill. Since the boat itself is low, the wind drag will be less because of the decreased windspeed at the waterline.
Music is "Blame not my Lute" by Jacob Herigman
@sdganj2009 Hi, I'm the builder. The clothespins and cord across the tank are to keep the shaft inline, otherwise the front prop starts to bang against the side of the tank. The "black bar" is the tube I used to fill the tank with water. Check out the the other videos on my channel and read the articles in the website, then you will understand better - website is sailwingsdotnet thanks
I find this fascinating and counter intuitive but a great thing to know. Its also such a simple and great direct drive system! your water propeller is interesting too. did you use the long bladed water propeller because of calculations or just because you had it lying around - looks like a toy airplane propeller ? would a smaller more traditional prop have worked? probably;y not. also would be interesting to hook the wind prop to a side our back paddle wheel since supposedly paddle wheels are actually the most efficient force transference to water. u would need a right angle gear though so would suffer some loss there.
you know since this works it makes me wonder if a gas dirigible would also work if you balanced the power prop vs the pusher prop correctly and minimized the side drag. of the vehicle. so counter intuitive but then again so is this.
also you catamaran could have much faster and sleeker hulls.
The propeller is a model aircraft one. These work most efficiently especially at low speeds. Human powered watercraft use them. The usual type of water prop does not work so well! Those types are probably used because of space constraints. I think the dirigible would work as long as the drag from the envelope was not too much. The frontal area of the gas-bag would be more than the frontal area of a floating hull.
Might be a good idea to EXPLAIN some of your ideas !
See www.sailwings.net/rotaryhome.html
not even reach optimum speed to hold the vessel in place... if it would work it would even have to have a boost to start working...perhaps a stretch in an anchor line but i dont see it...and yes i am very familiar with jacques cousteau's turbosail. ...i sail i let it heel and i run overpowered much of the time its fun... but apparent wind makes sence it allows my dinghy to outrun the wind on a broad reach easy to understand but countering the wind doesnt elsewise my 14ft pintail should pass
спасибо за Ваши наглядные опыты! Согласен, что водный транспорт может двигаться с помощью ветродвигателя (воздушного винта), на встречу ветру. Почему Вы не применили вертикальный ветродвигатель? Его не надо позиционировать по направлению к ветру! С уважением, С
The vertical axis is not suitable. This is because the drag is too much. But with horizontal axis you use blades which are airfoils. Such blades produce much more lift than drag. Up to 50:1 therefore the lift can overcome the drag.
я построил аналогичную конструкцию из 8 лепестков в одной плоскости. Вертится очень хорошо. По моим наблюдениям сопротивление меньше чем у статичных лопастей.
If you build one exactly as my plans www.sailwings.net/windspinner.html you will have the same success as me.
Есть недостаток в вашем проекте. Попробуйте представить эту модель в натуральную величину. И получиться очень большие и опасные винты. Мы пойдём другим путём.
@sdganj2009 It won't reach infinate speed, nor is it perpetual motion. It only works because of the difference in speed between the wind and the water, that is where the power comes from. Therefore you need WIND for it to work. The wind generated by its own motion would not be sufficient to power it.
not sure what those clothespins are or that black bar on bottom at the stern...my dad was a 26 year chemistry and algebra teacher he passed when i was 15 and physics says this cant happen i had ideas of the sort as soon as i learned bernoulli's principle at age5 my dad spoke up quick...bad thing is i dont understand it much more than i did then lol...a fluid flowing over a curved surface creates a low pressure area...aka lower than the bottom side of the foil...friction however reduces input
Hi Nicole, it's not a perpetual motion, it's an energy loss system. If the wind is blowing 10 mph, the boat will not go upwind 10mph. Great thoughts & inquisitiveness!
hullspeed upwind it planes downwind but it has a hullspead at 45 degrees how can you sail at 0?????????? I've been loseing sleep over this thought.lol
This boat appears to be held in place with an electro magnet to keep it from moving backwards
@ZKMX7 Ok i am starting to think this is very real i just took one of my model airplane props on a rod in front of a fan and surprisingly its backward force was low for its speed spining i think a prop underwater would pull something foward...it is an 11x7.5 (2 blade)...with a different pitch and size perhaps more curve even or more blades will would it acctualy produce lift like a sail and pull forward also?...on a planing vessel how would you keep this from reaching infinate speed?
@sdganj2009 would effeciency of the blades hit a peak at a certain speed or would you need a brake?
I take it back Nicole! I think from what I've read, it is possible to go upwind faster than the wind! I don't really understand it but people smarter than me say it's possible
great music :)
thanks :)
BTW i am 23 and I AM NOT trying to be a punk ass kid...this is perpetual motion basically if it where real we could strap it to anything and unless it had a hullspeed or tremendous drag eficent...using words i cant spell lol...its speed would be infinant...this is like curveing bullets and bending spoons with your mind to me...gearing makes since till you understand there is more friction there but this isnt geared and pitch being greater on drive would make me thing the drive blades would