Working Magnetic Motor on you tube??

[evil-doer]

the video says the strobe is set to 4620 rpm (im guessing flashes per minute)
/60 for 77 per second
/25fps for 3.08 flashes per frame. so it makes sense we see 3 strips

because each strobe is 90 degrees more than the last im guessing the device is spinning at 4620x1.25=5775rpm

ya, im just guessing

edit: ok i take that back, its probably slower than 4620, so youve gotta divide by something. im too tired to try to do math or think

[Omnibus]

@evil-doer,

By 'device' you mean the rotor (speaking of strips), correct? That's too high, isn't it? The stator then should rotate four times faster. Shouldn't it be 0.75 x 4620 = 3465rpm because we see three strips per frame (not always, though, some frames show 2 strips only, sometimes the follow up frame being the same 2-strip pic). That seems high too considering what the stator rpm should be then.

[mikeytown2]

CLaNZeR Thanks for putting up Alsetalokin's Third Video! If you could somehow get me the raw Interlaced PAL video that would be helpful. It appears that the deinterlacer used blends the fields. I can use a motion compensated bob deinterlacer which will give us 50 fps video. Here is your video at 5 fps forwards then reversed, then zoomed. Sorta took care of the flicker as well.

http://www.youtube.com/watch?v=7V8y7qfO9gw


Also if you guys are taking measurements from pictures, because of lens distortion, it won't be exact. If the ORGINAL jpg still has the EXIF data you can use this to undistort the image
http://www.brothersoft.com/gml-undistorter-download-42391.html
Otherwise use this GIMP plugin
http://wiki.panotools.org/Gimp_wideangle_plugin
GIMP
http://gimp-win.sourceforge.net/stable.html

[evil-doer]

@evil-doer,

By 'device' you mean the rotor (speaking of strips), correct? That's too high, isn't it? The stator then should rotate four times faster. Shouldn't it be 0.75 x 4620 = 3465rpm because we see three strips per frame (not always, though, some frames show 2 strips only sometimes the follow up frame being the same 2-strip pic). That seems high too considering what the stator rpm should be then.

ya youre exactly right, its turns 270 degrees per strobe

[Omnibus]

What rpm is he measuring in the first video anyway? Seems he's pointing the laser dot to the stator and when the effect kicked in it showed something on the order of 1300rpm. Then, when he stopped the two stators it again seems that he points the laser spot to the AGW stator and the rpm now read over 4000. Is this the way you understand it too? Is he measuring the rotor rpm at all in the first video?