Fieldlines.com: The Otherpower discussion board

{2}And although playing with powder fields is great as was thought to me at kindergarten before I was born (yeah we role a little different here on the wrong side of the pond ) I have these sheets of plastic that can show fields in 2 dimensions. visualizing in 3d just means moving the sheet up and down and making a video of it for analysis after the fact.{/2}

Quote from: Adriaan Kragten on February 27, 2024, 07:43:42 AM

The new chapter 7 now describes a 32-pole generator using the housing and winding of 4-pole asynchronous motor frame size 132M.

Adriaan;
132M !? maybe a mistype of AI auto-correct . My best guess is it was meant to be 132mm.
I could be wrong

Very nice update to the chapter otherwise!! I can easily see how the staggered magnets will help with the lowered cogging

Cheers
Bruce S

I'm trying to wrap my head around your thoughts, JW.  Are you striving for better english speakers?  Because when it comes to actual trial and error projects, that is what drove this place 15 years ago.  Your coloring of brandnewb's work as something less is confusing because he has been breaking the project into separate subjects for the purpose of tackling individual issues.  I have not seen any of his work to be simple or undisciplined.  He is testing using scientific methods.  That was how the site has worked all along.

I so am hoping that this is just all a misunderstanding of the greatest kind.

OK JW so it was you.

Sure you can do what ever it is you want. It is your prerogative and you have deserved that!

But one strong mind against another.
You are hurting my cause. and to a smaller extend that of the greater good.

Let me challenge you then in a good way.

I think I can overrule/or at least confirm by now like 70% of statements that are made by people that have already garnered your trust.

I think it would be only fair if we would as a community see how my ideas are either sound or flawed. And then when sound focus on how we can get a setup ready that can demonstrate/debunk said ideas.

You see JW? Our interests are actually aligned. It is just that I made a false start here and you can't seem to let go of that.

I am here to serve the interest of humanity JW. I would really love for your support on that.

And although you have gotten every right without the need for any explanation. I think you should reconsider your decision.

I have watched the video of Topspeed. It is a nice explanation of how such a windmill works. However, there is one substantial mistake. It is said that the vane is in parallel to the wind if the rotor turns out op the wind but this isn't correct. As the rotor has a certain eccentricity e and as the rotor has a certain thrust Ft, the rotor moment Mr = Ft * e. This rotor moment must be in balance with the vane moment Mv around the tower axis. The vane moment is the product of the force on the vane blade Fv and the vane radius rv at the aeodynamic centre of the vane blade. So Mv = Fv * rv. Fv is about linear to the angle of attack alfa in between the vane blade and the wind direction. You only get a certain Fv if the vane blade makes a certain angle alfa with the wind direction. So the vane blade is never in parallel to the wind direction for stationairy conditions. The angle alfa depends on the vane geometry and the wind speed. The higher the wind speed, the smaller the angle. The vane moment due to the aerodynamic force on the vane blade around the vane axis must also be in balance with the spring moment Ms around the vane axis.

This safety system is called the ecliptic safety system and more information about it is given in my public report KD 409. I have used a torsion spring around the vane axis because the spring moment of a torsion spring increases only a little for an increasing angle of rotation around the vane axis. The moment of a tension spring varies a lot because the distance of the heart of the spring and the heart of the vane axis is very dependent of the angle of rotation of the vane arm. I have chosen that the tower axis coincides with the vane axis because this simplifies the moment equations a lot.