Replication of the Jan P. Cack device?

[acp]

I analysed this in femm, the torque generated in 1 turn is 0.0, it balances out exactly. I don't think it is very interesting design anymore either, Just the amount of bearings needed, the gear wheels etc. produce a lot of friction.  Nice handy work from Clanzer.

[Omnibus]

I have more or less given up on these simulations because I don?t see them serving any useful purpose. Aside from the fact that FEMM is an obviously unreliable simulation to begin with. I'd never even consider using it. In them the magnetic field around a body of a given form is always assumed to be of exactly the same form as the magnetic field around another body of the same form. That?s not the case in a real experiment and it makes a hell of a lot of difference. I?d rather do what I already proposed above for Sean to do?carry out thorough measurements of the profile of the field with a gauss meter to see what the actual form of the magnetic field is of a construction made mechanically perfectly symmetric. The problems with these devices are the huge discrepancies in the actual fields in ostensibly perfectly manufactured contraptions.

[Omnibus]

I analysed this in femm, the torque generated in 1 turn is 0.0, it balances out exactly. I don't think it is very interesting design anymore either, Just the amount of bearings needed, the gear wheels etc. produce a lot of friction.  Nice handy work from Clanzer.

Show it. Show that simulation and let Stefan or @tao analyze it if they want, just out of curiosity, not that it is of any importance.

[Low-Q]

The closest I got OU is the link here:
http://www.geocities.com/k_pullo/SMOT15_PM3-3.htm

This thing provides allways positive torque in average, in FEMM. I have downloaded Maxwell SV - a free 2D version, so I will just see what this application says about it.

Vidar

[acp]

Here it is.