I can imagine this situation:
A spaceship hangs dead in space, broken engine. New wheel shapped part needed in the engine. Astronaut goes for a walk on the outer hull. Magnetic boots malfunction and for a short instance repell. there the astronaut goes at speed V, and the spaceship the other way at speed V/1000.
The astonaut ties the wheel on his bag, and makes swimming motions, to no avail.
Then he takes the wheel, and spins it up. It having aerospace sped bearings, it can absorb vast amounts of energy. Astronaut needs to use alternating hands to prevent his own spinning, to not lose track of the spaceship drifting away from him (her). At exactly the right angle, the astronaut take an intentional blow to the helmet from the wheel, and starts catching up witht he spaceship. Yet, can (s)he grab the wheel and take it along, or will that even out to drifting away from the ship again? This is where a good biosteel wire would have come in handy.

you can replace the magic hand with a servo motor at the pendulums pivot point.

all the magic hand is doing is replacing the stored energy that was lost on its return back to the magic hand. kinetic forces only store energy, once that energy is used up it will come to a stop.

all lost newtons will have to be replaced in order to keep the model going. there is no OU here, it is only stored kinetic energy.

Hi folks,

please go back to page 100, Reply #991 on and review I_RON measurements

Kator01

You aren't dumb Cloxxki, but this setup can be hard to understand, and especially if the way we load it is inconclusive, which some find it to be.

One demonstration video made by Milkovic which I liked very much is the one where he shows the difference of loading a 2-stage system from a 1-stage system. My opinion is that both are (or at least can be) driven by resonance, since they have their own resonant frequency. The problem with the 1-stage is that any work which it is made to do, will do the the same negative work back on it to stop it (opposite reaction).
This is because distance and force goes both ways, just like in all ordinary system.

The video I am talking about is where he shows a simple educational demonstration-set which could be bought (I think it can), where a vertical steel rod is suspending another bendable rod.

First he attaches a large piece of stiff paper on the end of the rod, pulls it a little up and lets it go.
The rod will then bounce up and down, but because of the large air resistance it will come to a stop very fast, almost immediately.

Then he attaches a small and simple pendulum to the bendable rod and let it swing. It will continue for long time without being excessively slowed by the load of the air resistance. In fact, because the 2 stage oscillator works the way it does, the more you would have loaded it (the larger the surface to push air), the longer it would take before the pendulum would stop. This is because it would limit the distance moved by the pendulum pivot even more.


I think this is a very good video to show the difference between normal oscillation (where if it is resonantly driven, it will always be drained by the same amount by which it does work), and a 2-stage or parametric oscillation (where it will be drained by distance only, and thus where resonance can be used to do much more work, if the distance on which it does work is kept the same or lower (which again can be done by increasing the load)).

So here is the point: increase the power of the pendulum, then increase the resistance of the load whatever it may be, and the total efficiency or COP of the system will go up.
This is the power of parametric resonance.

Julian

You should post the video link so that all of us know what you want to say - watch from 02:00 min
http://video.google.com/videoplay?docid=-8961722273257830738#

Sorry Merg, but I didn't really remember which video it was, thanks for posting it 

Well the input power is not very much so you do not get that much out either.
Yes I agree with you, the energy needed to create a large amplitude in the string is large, but still it dies out almost immediately. The energy into the pendulum isn't very much but it does last a lot longer, and it does put out some work to move the air.

Now here is an experiment to think about, and it is probably more correct than the demonstration shown; take that paper and attach it to the pendulum instead. Now compare the air moved against the time it can keep moving. Then you do the previous experiment, with the paper on the string driven by the pendulum. I think this will show the difference between the two ways of using oscillation power better.

Julian

The preferred way to close the loop, while extracting useful work, would be to devise a rotary system. While it is certainly possible to build a perpetual pendulum, the swing periods of themselves, do not create enough centrifugal force from which to reduce the required power.  Even a rotary system itself, would need to be of appreciable scale in order to extract advantageous power output.

When such a rotary system is evidenced, the greater possibilities may present themselves, as G force can be greatly amplified artificially.

TS

Well, you've come to the right place!  I can put you in touch with Steorn straightaway....

lol

As for your epoxy troubles, might I recommend Finsrud, as I'm sure he has overcome his difficulties!


 


TS