Roll on the 20th June

[mango tarbash]

I don't fill my scooter with petrol. But that's my choice. I've done fine in this life by pedalling everywhere. But then I am a man of principle and like Archer willing to put my money where my mouth is. Not just talk.

[DarkStar_DS9]

So sorry I havent gotten to answering your questions.

I really appreciate that you are willing to answer them at all. It only takes little effort to come up with a scenario that might look interesting if not examined closely, but it takes much more effort to find out why it is not that interesting at all. So your effort is appreciated,  at least by me. Thanks.

Now some may be asking "but if I increased the force by increasing the number of turns and not the current, why wouldnt that allow it to lift with less energy?" Great question. As the number of turns increases, so does the inductance. As the inductance increases, the voltage required to establish electron flow increases. And since Power=Volts*Amps, power increases.

Uhm... well, no. If I put a permanent magnet near the coil in FEMM and have it calculate the push / pull, it will show (literally! it's displayed on the screen) that the same force will act on the magnet, even if it displays half the Watts used for the coil.

So what you're saying is that FEMM is wrong? Or that I used it incorrectly (very likely - it is not meant for the layman obviously)? Would you mind setting it up in FEMM and tell me what's going on? http://femm.foster-miller.net/wiki/HomePage

A spinning wheel set on the ground perfectly ...

Ok you got that part wrong. I'll try to explain it more clearly (guess I have been dealing with Archer for too long - there is this very simple thought in my mind and I just can't spell it out in a way that other people understand - sounds familiar?)...

The wheel is suspended. It doesn't go anywhere, it just spins. It does not touch the ground. So again, let's draw a line on the wheel, thru the center. Horizontally. Hold the wheel so that it can't spin. To make it easy, put some weight on the left side where the line reaches the end of the wheel (at 9 o'clock). Put the exact same weight on the right side (3 o'clock). Let go. What happens? Nothing, perfectly balanced - right?

Now hold the wheel again. Put some more weight on the right side (just enough to overcome the friction, so that the wheel will turn when you let go). This weight will have x grams. No let go, what does the wheel do? Turn, until x passes 6 o'clock at which point it will slow down, turn in the other direction and so on until x stays at 6 o'clock. Right?

Now remove x (but don't throw it away just yet, we will need it in a minute). Attach the two weights (one is now at 12, the other one at 6) to a pulley and detach them from the wheel. What happens? Nothing, it will just hang there because of the friction, right? Now add x to the weight at 12. What happens? The weight will start to go down. Stop it when it reaches the middle of the wheel. Now the weights will be at the same height as they started, we just have to move them to the edge of the wheel again - right?

Now this worked like a 1:1 lever, and we had to use a 1:1 pulley. If we would have used 1:0.9 (both on the wheel and pulley) then we wouldn't need x, but we couldn't quite get the weights back to the same height obviously. Right?

Now let's say we do use 1:0.9 and repeat the experiment, but instead of waiting for the wheel to swing around the 6 o'clock position, we will - somehow - detach the weights from the wheel exactly at that time when the weight just passed 6 o'clock. We will not only detach them, put transfer them on to a rail of some sort. Assuming that our weights are round and the method of transfer does not decelerate the weights completely, they will now roll on their rails because they have momentum. The wheel should also spin, because it also has momentum. Are you still with me?

Now if those rails where the weights are rolling on have a slight slope, the weights will be able to climb it - at least a little, probably not that much - but still, they will climb. Right? Now where does that put them, height wise? The upper one is a little above the wheel, the lower one a little above the bottom of the wheel, right? So if we use a 1:0.9 pulley to try and return the weights to the start position, we will be closer to success because the upper one can travel a little longer, and the lower one does start with a little advantage, so it does not have to go that far, right?

So the first question is: Will this "work" as in "is this an advantage as opposed to just using a standard lever" or did I miss something obvious and my theoretical device can go straight to the museum of unworkable devices? The advantage I see is that a) you don't have to return the lever to it's start position b) you might be able to get some energy output from the wheel c) the weights will travel a short distance upwards so that you can get closer to the start-position.

The next questions are: If there would be a perfect way to detach the weights from the wheel and put them on a rail (not slowing down the wheel or the weights), how far can they go up? How much energy is "stored" in the wheel (assuming it will continue to turn for a while after we have removed the weights)? How far away will the weights be from their starting position (height wise) after using the pulley?

And one real-life question: if I double the weight of a wheel, will this also double the friction of the bearing?

Regards,

Rainer

[CLaNZeR]

I THINK the glass would repel your spoke (pole) when it hit it as well - similar to the magnet.  And if the wheel continued to spin from momentum it would lift the pole up offsetting the weight and causing the wheel to spin more.  And if the initial hand spin was hard enough (like how you spun your wheel in that last video) it would probably rotate a few times and then eventually it would bounce off the glass.  It is NOT exactly the same, but is similar.

Now.. this does not take into account the upper attracting magnets, which is certainly helping your wheel to spin.  But that is a different post.


Honestly, exxcomm0n and CLanZer, this post is NOT meant as an attack or a slight.  I honestly want your opinion as guys who actually build something.

@Badass

You are spot on and this is how the bottom magnets react when a bar first approaches them, they would rather go around than through and hence why there is so much pressure on the bearing and wheel.
I was thinking of mechanical lift using a low friction ramp and like you say glass is excellent, and then also having a fine pointed end attached to the end of the magnets, so we reduced friction.

Another thought was to maybe created a longer bottom arc so as the arms come down they have already entered the repulsive path as such and get eased into the field as it gets stronger. Or maybe a bit of steel shielding to reduce the sticky spot on entry.

At the moment the initial Bump (Sticky Spot) it hits does take some getting over, but I am sure when weighted correctly it will get past it, as long as the bearings can keep the wheel straight and the Stator holder is firmly in place.

@Archer Looking forward too seeing the videos when I get back to my accomodation tonight 

Cheers

Sean

[The Eskimo Quinn]

http://www.youtube.com/user/newtonsend269 

the above is the link to all the videos, they are numbered so watch the in order, three are up the last is loading, but you dont have to wait for the last one to see it running, should be up in around 20 mins, my broadband has suddenly gone to 20kbs per second, slower than dial up.

No more math lectures yeeha

cant use something that is not correct 

[Man-K]

I've never known a you tube vid to load so slowly 

How many of us are there trying to watch this thing?

Archer, any chance it can be put up sopmewhere where we can download it? I know I know, all we do is ask for stuff around here and then give you stick for it.

Peace out,
K