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Author Topic: Weightless Weight  (Read 18842 times)

Alexioco

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Re: Weightless Weight
« Reply #45 on: May 03, 2009, 09:40:51 PM »
Quote from: Lilhawk on May 03, 2009, 09:08:45 PM
Alex...sorry to hear your having problems with getting the file/pic/vid  posted

if you don't mind I be interested in those figures I mentioned about earlier

when I did my tests I just pulled on the load string.  When you have a balance the load weight will not matter.

I'm sorry for over reacting, I am just getting upset about that everyone is using my design and telling me it doesnt work  :'( all I can say is I have it here unless im mistaken in some way but to me it seems to be working...

Alex
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ruggero

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Re: Weightless Weight
« Reply #46 on: May 03, 2009, 10:08:46 PM »
Alex,

I've just did some quick build testing.
Let me hear if you got the same results:

a) the lever balance in horizontal position
b) when you push the weight-hanging side a few degree down,
    it overbalance to that (hanging) side, and then falling all the
    way down to the bottom by it self
c) push the mounting side down (where the string are mounted)
    and it will hold its position anywhere in that quarter of a 'circle-path'
    form horizontal to vertical (buttom).
d) to release a position (according to c) you need to put a weight
    on the mounting side that is heavier than the existing hanging weight

ruggero  ;)
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hansvonlieven

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Re: Weightless Weight
« Reply #47 on: May 03, 2009, 10:47:33 PM »
Quote from: Alexioco on May 03, 2009, 09:40:51 PM
I'm sorry for over reacting, I am just getting upset about that everyone is using my design and telling me it doesnt work  :'( all I can say is I have it here unless im mistaken in some way but to me it seems to be working...

Alex

Sorry Alex, but I can only go by what you have given me. Perhaps you could make an exact drawing what you are experimenting with and we can have another go. Maybe a photo of your device.

Hans von Lieven
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Lilhawk

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Re: Weightless Weight
« Reply #48 on: May 04, 2009, 01:28:50 AM »
Hey Ruggero...I see some thought went into the last one ...you definatly like circles :P

but i went over the first one you posted.  You said increasing the angle and adding weight to the top end would get this going.

I did some math to show what its going to take.
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Lilhawk

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Re: Weightless Weight
« Reply #49 on: May 04, 2009, 02:03:45 AM »
Any body that has one of these working please post your build as per drawing
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hansvonlieven

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Re: Weightless Weight
« Reply #50 on: May 04, 2009, 03:52:13 AM »
Yes, this is exactly how I had it in the simulation. It does not work the way Alex says.
 
 Here are 4 screenshots of the simulation that show what happens under those conditions.
 
 Hans von Lieven
« Last Edit: May 04, 2009, 04:12:24 AM by hansvonlieven »
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ruggero

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Re: Weightless Weight
« Reply #51 on: May 04, 2009, 08:41:45 AM »
Exactly Hans....my life test build did the same.
Can you try a sim putting some weight on the left side, to document what 'lilhawk' was calculating?

lilhawk:
Yes I like circles...but I like spirals even better 8) – especially when added to an Atwood connected pendulums.
The point I'm trying to make by using circle in this setup is, that the string/rope resting on more or less of the circumference (rim) may have some importance to the tension and distribution of force...

Nice calculation btw. You point at the same issue as mentioned in my latest post.
And I agree with your request: If anyone got a build that behave differently, we need some documentation to support such statement.

ruggero  ;)
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ruggero

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Re: Weightless Weight
« Reply #52 on: May 04, 2009, 09:07:45 AM »
Quote from: Alexioco on May 03, 2009, 09:40:51 PM
I'm sorry for over reacting, I am just getting upset about that everyone is using my design and telling me it doesnt work  :'( all I can say is I have it here unless im mistaken in some way but to me it seems to be working...Alex

I completely understand your frustration, Alex.

Try to see it from another position:

We do not say that your design doesn't work!
We do not say, that you are not truthworthy!

What we are saying is, that our effort to try to replicate your design do not replicate your results.

To find out why this is happening, we try to examine possible differences on elements and vital details such as angle, lbs, pulley-size, measurements etc.

Finally, at this point your design is 'used' for evaluation.

ruggero  ;)
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hansvonlieven

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Re: Weightless Weight
« Reply #53 on: May 04, 2009, 09:54:52 AM »
This is equilibrium, as expected.

Hans von Lieven
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Alexioco

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Re: Weightless Weight
« Reply #54 on: May 04, 2009, 02:57:43 PM »
its strange why this is, its not different from that one Hans posted, that is really strange... Wander why, I made two that work... I will write about what i did then post it

Alex
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