Simple Experiment: Extraction of Energy from Permanent Magnets

[dieter]

Don't know exactly what pendulum you mean but shouldn't you compare just vertical and horizontal bullet discharge?


Anyway, one day I'll get it.


Meanwhile I'm thinking about solid state ways with PMs. Lenzless reluctance switching.


PMs are amazing. Imagine a Neo PM, 1 inch diameter, 3 inches high. It has like 1 Tesla at the surface. Now add a closwd iron fluxpath, 1 inch dia. and 6 inch high. Now the entire iron part parallel to the PM has 2 Tesla. Double the length, double the strength. That's saturation. Even with emagnetics you can't go higher than to saturate the core. I can't understand why people say PMs are too weak.

[telecom]

No intention to confuse anybody, ballistic pendulum is used to determine the energy of the bullet.
We 've discovered the energy anomaly -  energy of the bullet simply disappears when it hits it.
In any case, I'm really interested in what you are doing here,
probably the bigger the magnet, the better.

[Zephir]

We 've discovered the energy anomaly -  energy of the bullet simply disappears when it hits it.

This is rather common situation, once the bullet becomes subject of friction. After then the energy of bullet isn't converted and utilized to kinetic energy/momentum of the ballistic pendulum, but to its thermodynamic energy, i.e. the heat content. The gun suppressors work (partially) in similar way.

[telecom]

This is rather common situation, once the bullet becomes subject of friction. After then the energy of bullet isn't converted and utilized to kinetic energy/momentum of the ballistic pendulum, but to its thermodynamic energy, i.e. the heat content. The gun suppressors work (partially) in similar way.

But I can drive the same bullet into the same piece of wood and spend only 5 J, not 5000 J
In addition, why conservation of the momentum works, and conservation of energy - not?
They use a conservation of the momentum there.
It seems to me that conservation of energy only valid when kinetic energy is directly
transmitted into potential, as if the bullet was shot vertically.
In this case it would go up to 500 meters.

[dieter]

if you don't mind, "bullets" brings up some bad memories to me, thanks.