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### Author Topic: Play inertial "trampoline"...  (Read 5934 times)

#### iacob alex

• Hero Member
• Posts: 1280
##### Play inertial "trampoline"...
« on: November 17, 2008, 02:46:51 PM »

...as a procedure,manner to establish the switching of the long arm size,on the same side of the fulcrum,so to get a continuous unbalance of your scheme,design.

It can be an easy understanding situation for a "minimal wheel":two spokes,arms only,that play the long arm-short arm game,on the same side of the bearing,fulcrum.

The proposal of the inertial "trampoline" is suggesting a heavy hub for your arrangement,as a mechanical spring,that plays the "charge-store-discharge" line,serial of energy.

Can we use the rotational inertia proposition,as a mechanical spring....or as an inertial "trampoline" in our mental "acrobatics"?!

All the Bests !  /   Alex

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline"...
« Reply #1 on: November 18, 2008, 11:26:07 AM »

Hi P -Motion!

In my opinion,we need no "extra",so to discern,interpret that we can use and understand rotational inertia as a mechanical spring process(charge-store-discharge).Just remind the flywheel of a car power transmission.

You can point out the word "trampoline",as a likeness or an allegory for an elastic,springy performance,a description of one thing under the image of another.Where there's a wll,there can be a path to see.

My suggestion was plain:to add this process in some way.

All the Bests!  /  Alex

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline"...
« Reply #2 on: November 18, 2008, 10:14:17 PM »

Hi  P-Motion!

As soon as possible,I will post at my web-site a succession of pictures,drawings regarding this topic among other things.

So,I hope to be more clear,intelligible :the "painting" of reality with my words is fuzzy,blurred sometimes.Sorry...

All the Bests!  /  Alex

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline"...
« Reply #3 on: November 19, 2008, 09:59:13 AM »
Hi P-Motion!

There I will  post  some news in a couple of days.

I prefer the picture "language",the first lines so to  be easy tested  in their possible connection with the real physical phenomena.

All the Bests!  /  Alex

#### hansvonlieven

• elite_member
• Hero Member
• Posts: 2558
##### Re: Play inertial "trampoline"...
« Reply #4 on: November 19, 2008, 09:42:29 PM »
Hi Alex,
From what I was imagining, a rocking back and forth, spinning first one way, then the stop. Then a counter  spin. People might wonder if they're on something.
But do think something like that could work. It would be trippy as hell to watch, but yeah, it could work.

G'day P-Motion and all,

What you are describing here is a balance wheel in a mechanical clock. That is exactly what it does. Nothing special there though. This kind of thing has been around for a very long time.

Hans von Lieven

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline"...
« Reply #5 on: November 24, 2008, 04:24:38 PM »

Hi!

The mechanical balance wheel(see the mechanical clock,,the little wheel and the tiny spring) is out of question here.

We are looking not for a swinging motion(to and fro,see-saw or Milkovic's arrangement type) but for a continuous turning,revolving one(with the same formal far-away "visage" of some water or  air flow captors).

So ,the first problem is to imagine in a simple way...an unbalanced set,to let it fall(as in a real,visible flow) up-down(semicircle trajectory).

Let's say,that we begin with a long arm-short arm scheme.

It is an uninterrupted fall motion to gain more kinetic energy(rotational inertia).

Only when we have sufficient energy(the bottom point of the free fall) ,we must release a short -time "trampoline" type motion,so to "reamake" our starting unbalance,on the same side of the fulcrum: ...again the long arm-short arm scheme.

The "trampoline" play is a proposal only,and appears to be as a secondary problem.

So,can we hope for a "self"?!

All the Bests!  /  Alex

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline effect"...
« Reply #6 on: February 17, 2009, 06:54:09 AM »

...something that ,maybe when you was a  child ,it amazed you at the circus show.

What I call "trampoline effect" is not really a trampoline,but something alike.

So,a "trampoline effect",as I intend to suggest,can be that well-known stunt,performed by acrobats using a "see-saw" apparatus(in fact,a simple lever).

Usually,two acrobats drop from a certain height,onto one arm of the lever,on the other arm,a single acrobat is launched twice as high into the air.

We can understand that the lever in a very short time,transfers the momentum of the two acrobats into one acrobat,sending him twiceas high.

This leap,spring,jump ,hop is quick as a flash motion ,that can help us to organize the long arm-short arm switching process,after a "full"(0* to 180* degree) accelerated fall.

Sure,this process can be designed as a mechanical power transformer(lever),or as an usual electrical power transformer.

All the Bests!  /  Alex

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline effect"...
« Reply #7 on: February 18, 2009, 02:44:05 AM »

Hi !

The proposal  for  a  " trampoline effect",is that of a self-switching method ,possibly useful in a long arm-short arm classic arrangement.

A trampoline is usually a frame with springy material on which people jump up and down...

Here, the trampoline material,frame  becomes ...a simple lever.For this reason,I said "trampoline effect",and we are interested for the jump up motion,only.

If you take a look at    www.geocities.com/iacob_alex/Stellarotor.html     and then click on "Some Drafts"/pos.42-48/Free Gravity Rolling 1-6 ,you can make your "movie".

So,in my opinion some comments(..."a swinging rock"....."a balance wheel in a mechanical clock"...) can be digested as a misunderstanding...but others(..."nothing special there"..."this kind of thing has been around for a very long time"...) made me think in a different mode:...for some people a "skeletal" idea means nothing:a question of style,manner to work side by side in a forum-team.Sorry..to be in the wrong place.

Anyway....All the Bests!  /  Alex.

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline"...
« Reply #8 on: February 21, 2009, 12:13:59 AM »

...if you take a look at    www.geocities.com/iacob_alex     then click on  Some_Drafts/text047.jpg
("Trampoline"  Pendulum).

All the Bests!  /  Alex

#### iacob alex

• Hero Member
• Posts: 1280
##### Re: Play inertial "trampoline"...
« Reply #9 on: October 12, 2023, 04:35:01 PM »
…..if you take a look at :  www.geocities.ws/iacob_alex/Some_Drafts/text047.jpg
…..as a possible self running arrangement (lever,pendulum,launcher ) , playing a continuous unbalanced  lever ? !
Al_ex

#### Cloxxki

• Hero Member
• Posts: 1083
##### Re: Play inertial "trampoline"...
« Reply #10 on: October 12, 2023, 07:37:48 PM »
Is there a position where the COM is the lowest? If so, how would it avoid that as a point of equilibrium better than a simple pendulum?