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08-22-2011, 03:28 AM
|  | Registered User | | Join Date: Feb 2011 Location: NW England | | | Balls Of Steel
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08-22-2011, 09:24 AM
|  | that video LIES | | Join Date: Aug 2004 Location: Northern California | | | Can't watch- bladder issue
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08-22-2011, 09:48 AM
|  | One lab accident away from being a supervillain | | Join Date: Aug 2006 Location: Powder Springs, Ga | | | While requisite for the attempt, I would think that steel balls would make such a feat even more challenging.
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08-22-2011, 10:31 AM
| | Registered User | | Join Date: Feb 2011 Location: NW England | | Quote: |
Originally Posted by PSPookie While requisite for the attempt, I would think that steel balls would make such a feat even more challenging. | Hmmm. Assuming said steel clockweights hung nicely either side of his centre of gravity, that would give a greater turning moment on each side, thus it would be harder to displace his mass from the centre of gravity and make the job easier?
Physics and testicles...a winning combination. |
08-22-2011, 10:37 AM
| | Registered User | | Join Date: Mar 2006 Location: tulsa oklahoma | | | id be terrified just riding in the cable car. i hate heights
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08-22-2011, 10:37 AM
| | Registered User | | Join Date: May 2010 Location: Los Angeles, CA | | | Darwin? Is it me you're looking for? I can see it in your eyes...la la la
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08-22-2011, 10:38 AM
| | One lab accident away from being a supervillain | | Join Date: Aug 2006 Location: Powder Springs, Ga | | Quote:
Originally Posted by Tituscrow Hmmm. Assuming said steel clockweights hung nicely either side of his centre of gravity, that would give a greater turning moment on each side, thus it would be harder to displace his mass from the centre of gravity and make the job easier?
Physics and testicles...a winning combination. | While I could see them being useful for damping of aeolian mode vibrations, I should think that attaching a suspended mass would have a negative impact on overall system stability.
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08-22-2011, 10:39 AM
|  | The Lowdown Diggler | | Join Date: Apr 2006 Location: Huntington Beach, CA | | Quote: |
Originally Posted by tastybasslines Darwin? Is it me you're looking for? I can see it in your eyes...la la la |  |
08-22-2011, 10:40 AM
| | Registered User | | Join Date: Nov 2005 Location: Listowel/KW Ontario | | Quote: |
Originally Posted by PSPookie
While I could see them being useful for damping of aeolian mode vibrations, I should think that attaching a suspended mass would have a negative impact on overall system stability.
| Not it they hung low enough, thus lowering his centre of gravity.
lowsound
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08-22-2011, 10:50 AM
|  | I play the electric tuba. | | Join Date: Sep 2004 Location: Cleveland | | | Check out the documentary "Man on Wire". It's got some pucker-inducing moments.
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08-22-2011, 11:13 AM
| | One lab accident away from being a supervillain | | Join Date: Aug 2006 Location: Powder Springs, Ga | | Quote:
Originally Posted by iamlowsound Not it they hung low enough, thus lowering his centre of gravity.
lowsound | But, if they hung low enough to significantly impact his center of gravity they would almost certainly hinder his ability to walk normally.
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08-22-2011, 11:33 AM
| | Registered User | | Join Date: Feb 2011 Location: NW England | | Quote: |
Originally Posted by PSPookie
While I could see them being useful for damping of aeolian mode vibrations, I should think that attaching a suspended mass would have a negative impact on overall system stability.
| Surely not. The more mass either side of the C.O.G, then the further he needs to 'tip' to achieve fatal displacement from the vertical? |
08-22-2011, 11:54 AM
| | One lab accident away from being a supervillain | | Join Date: Aug 2006 Location: Powder Springs, Ga | | Quote:
Originally Posted by Tituscrow Surely not. The more mass either side of the C.O.G, then the further he needs to 'tip' to achieve fatal displacement from the vertical? | He wouldn't need to tip any further (tip over point is when COG is outside of supports) but it would be a bit harder to tip him over (greater rotational inertia).
My concern was with the swinging moments that would be introduced.
Now that I think about it, they could serve as a plumb bob . . . you know as a tool for reference.
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08-22-2011, 12:29 PM
|  | Registered User | | Join Date: Sep 2008 Location: West Covina (LA), SoCal | | Quote:
Originally Posted by Tituscrow Hmmm. Assuming said steel clockweights hung nicely either side of his centre of gravity, that would give a greater turning moment on each side, thus it would be harder to displace his mass from the centre of gravity and make the job easier?
Physics and testicles...a winning combination. | Nah, teyd start swinging way up there and throw his center of gravity to and fro...
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08-22-2011, 12:56 PM
| | Registered User | | Join Date: Feb 2011 Location: NW England | | Quote: |
Originally Posted by PSPookie
He wouldn't need to tip any further (tip over point is when COG is outside of supports) but it would be a bit harder to tip him over (greater rotational inertia).
My concern was with the swinging moments that would be introduced.
Now that I think about it, they could serve as a plumb bob . . . you know as a tool for reference.
| Gotcha. I mistakenly assumed his plums of steel would remain motionless relative to the rest of his body. Yep, more inertia required to get 'em swinging, but chaotic oscillations wouldn't be far off. |
08-22-2011, 01:01 PM
| | One lab accident away from being a supervillain | | Join Date: Aug 2006 Location: Powder Springs, Ga | | Quote:
Originally Posted by Tituscrow Gotcha. I mistakenly assumed his plums of steel would remain motionless relative to the rest of his body. Yep, more inertia required to get 'em swinging, but chaotic oscillations wouldn't be far off. | But what is the point (if one exists) at which the benefits of the additional rotational inertia are equal to the chaotic swinging detriments?
Yeah, we're wearing out the theory on this one . . . nothing to do now but head to the lab. Need data points.
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08-22-2011, 01:09 PM
| | Registered User | | Join Date: Feb 2011 Location: NW England | | Quote: |
Originally Posted by PSPookie
But what is the point (if one exists) at which the benefits of the additional rotational inertia are equal to the chaotic swinging detriments?
Yeah, we're wearing out the theory on this one . . . nothing to do now but head to the lab. Need data points.
| Good question. That point will exist, somewhere along the circumference of curvature, assuming his point of contact remains fixed to an exact spot on the wire.
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