...due to gravity,you can see at : www.geocities.com/iacob_alex/Some_Draft ... led016.JPG
This is a particular application (two unequal disks,two pocket money,a.s.o. ...any shapes,you can imagine ),of a general concept at :
www.geocities.com/iacob_alex/Some_Drafts/text028.JPG
All the Bests! / Alex
A self-moving lever...
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A self-moving lever...
Simplicity is the first step to knowledge.
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re: A self-moving lever...
.....in an elementary mechanical expression,but this time,as a kinetic sculpture,at : www.youtube.com/watch?v=ZHh5w8nvD3M
The name: "Breaking Column.mov"
Sometimes,the art is a subtle,ingenious,crafty expression of science...
As a primary "first line on paper",we have a "self"-moving first class lever ,due to an interplay of wind ,gravity and inertia.
If the whole is simpler than the sum of its parts,we have a lever with a single variable arm...
Why not to use this simple idea?...regarding the topic of this forum?
To simplify,the proposal is:a self-rotating lever,due to gravity and inertia.
All the best! / Alex
The name: "Breaking Column.mov"
Sometimes,the art is a subtle,ingenious,crafty expression of science...
As a primary "first line on paper",we have a "self"-moving first class lever ,due to an interplay of wind ,gravity and inertia.
If the whole is simpler than the sum of its parts,we have a lever with a single variable arm...
Why not to use this simple idea?...regarding the topic of this forum?
To simplify,the proposal is:a self-rotating lever,due to gravity and inertia.
All the best! / Alex
Simplicity is the first step to knowledge.
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- Addict
- Posts: 2413
- Joined: Mon Nov 20, 2006 1:37 am
- Location: costa mesa /CA/US
- Contact:
re: A self-moving lever...
.....or rotating seesaw with a single player (it's nothing more than an elementary variable leverage...) , at :
www.youtube.com/watch?v=mOGOpzGffRo
To simplify (sometimes "less is more"...) , we have :
-support (fulcrum)
-lever/bar
-fixed mass/counterweight
-mobile mass/circus performer
The continuous rotation is due to a ceaseless gravity unbalance , "tumbling" every half-turn , on the same side of the fulcrum.
If we can replace the performer's motion , with an "equivalent" unbalanced "contrivance"/mechanical..?.. , we can hope for a continuous rotation , due to gravity fall/unbalance and inertia , only!
Al_ex
www.youtube.com/watch?v=mOGOpzGffRo
To simplify (sometimes "less is more"...) , we have :
-support (fulcrum)
-lever/bar
-fixed mass/counterweight
-mobile mass/circus performer
The continuous rotation is due to a ceaseless gravity unbalance , "tumbling" every half-turn , on the same side of the fulcrum.
If we can replace the performer's motion , with an "equivalent" unbalanced "contrivance"/mechanical..?.. , we can hope for a continuous rotation , due to gravity fall/unbalance and inertia , only!
Al_ex
Simplicity is the first step to knowledge.
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- Addict
- Posts: 2413
- Joined: Mon Nov 20, 2006 1:37 am
- Location: costa mesa /CA/US
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re: A self-moving lever...
.....animation , as a " continuous counterweight rotation" at :
https://youtu.be/3o6v9gwTb7s
...if we upset,roll upward the torque difference on the same side of the fulcrum , as a "self" motion...
Al_ex
https://youtu.be/3o6v9gwTb7s
...if we upset,roll upward the torque difference on the same side of the fulcrum , as a "self" motion...
Al_ex
Simplicity is the first step to knowledge.
re: A self-moving lever...
This is a geared parallelogram proposition in effect. The two end cams have the same gearing from a central stator.
The important thing to learn from these is that it is balanced in any position i.e. there is no torque advantage in either direction.
The reason is to do with the GPE gained and lost on both sides of the rotor. They are the same magnitude - they are equal.
If the gearing to one cam is slightly altered then they will not have equal height loss and gain, and there will be torque produced and it will turn.
However the system will now lower its CoM which won't be recovered without energy input. The GPE lost by the lowered CoM is equal to the temporary KE gain of rotation.
The important thing to learn from these is that it is balanced in any position i.e. there is no torque advantage in either direction.
The reason is to do with the GPE gained and lost on both sides of the rotor. They are the same magnitude - they are equal.
If the gearing to one cam is slightly altered then they will not have equal height loss and gain, and there will be torque produced and it will turn.
However the system will now lower its CoM which won't be recovered without energy input. The GPE lost by the lowered CoM is equal to the temporary KE gain of rotation.