Talk:697: Tensile vs. Shear Strength - Revision history

172.68.174.231: Undo revision 369661 by 172.71.184.8 (talk)

2025-03-21T08:48:53Z

Undo revision 369661 by 172.71.184.8 (talk)

172.71.184.8 at 08:37, 21 March 2025

2025-03-21T08:37:10Z

172.71.242.189: Misedited this bit of the response out, before submitting, it seems.

2024-03-13T20:41:52Z

Misedited this bit of the response out, before submitting, it seems.

172.70.90.28 at 20:38, 13 March 2024

2024-03-13T20:38:10Z

Bebidek: Added my thought that the elevator could have been saved

2024-03-13T17:59:45Z

Added my thought that the elevator could have been saved

SDSpivey at 00:21, 29 October 2021

2021-10-29T00:21:52Z

162.158.158.113 at 10:51, 3 May 2021

2021-05-03T10:51:27Z

162.158.158.113: Elaboration on claim that the lyrics fit to a given tune

2021-05-03T10:50:11Z

Elaboration on claim that the lyrics fit to a given tune

141.101.104.201 at 07:21, 28 July 2019

2019-07-28T07:21:06Z

Gmcgath: Burma Shave comment

2016-10-25T20:23:38Z

Burma Shave comment

← Older revision		Revision as of 08:48, 21 March 2025
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	:...all engineering problems to be very closely looked at. But ''not necessarily'' until solving (conceptually, and but sufficient intermediate practical testing) the issue of the actual Space Elevator. Only then can you have an elevator system that you know enough about to exactly work out the necessary contingencies for various (foreseeable) emergency situations. One can certainly extensively postulate various ways to deal with various dangers, but it's hard to be exactly sure if that sheer-snip is something trivial enough, to solve through quickly tying a brick to the end, or potentially no less disasterous than sending a whole group of waiting astronauts of an impromptu grand tour of the solar system when they'd only signed on to staff a simple space-hub facility!		:...all engineering problems to be very closely looked at. But ''not necessarily'' until solving (conceptually, and but sufficient intermediate practical testing) the issue of the actual Space Elevator. Only then can you have an elevator system that you know enough about to exactly work out the necessary contingencies for various (foreseeable) emergency situations. One can certainly extensively postulate various ways to deal with various dangers, but it's hard to be exactly sure if that sheer-snip is something trivial enough, to solve through quickly tying a brick to the end, or potentially no less disasterous than sending a whole group of waiting astronauts of an impromptu grand tour of the solar system when they'd only signed on to staff a simple space-hub facility!
	:(Either way, it shouldn't be so very dangerous to those standing around that ground-station, for that particular failure, leastwise none whose reactions aren't quicker than a moment of considered common sense! Unless the cable whip-frays, but BH likely wouldn't be so casual a out it, if that was the case.) [[Special:Contributions/172.70.90.28\|172.70.90.28]] 20:38, 13 March 2024 (UTC)		:(Either way, it shouldn't be so very dangerous to those standing around that ground-station, for that particular failure, leastwise none whose reactions aren't quicker than a moment of considered common sense! Unless the cable whip-frays, but BH likely wouldn't be so casual a out it, if that was the case.) [[Special:Contributions/172.70.90.28\|172.70.90.28]] 20:38, 13 March 2024 (UTC)
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−	~~-- snibbedi snab X D D~~
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−	~~-- FUG : D~~

← Older revision		Revision as of 08:37, 21 March 2025
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	:...all engineering problems to be very closely looked at. But ''not necessarily'' until solving (conceptually, and but sufficient intermediate practical testing) the issue of the actual Space Elevator. Only then can you have an elevator system that you know enough about to exactly work out the necessary contingencies for various (foreseeable) emergency situations. One can certainly extensively postulate various ways to deal with various dangers, but it's hard to be exactly sure if that sheer-snip is something trivial enough, to solve through quickly tying a brick to the end, or potentially no less disasterous than sending a whole group of waiting astronauts of an impromptu grand tour of the solar system when they'd only signed on to staff a simple space-hub facility!		:...all engineering problems to be very closely looked at. But ''not necessarily'' until solving (conceptually, and but sufficient intermediate practical testing) the issue of the actual Space Elevator. Only then can you have an elevator system that you know enough about to exactly work out the necessary contingencies for various (foreseeable) emergency situations. One can certainly extensively postulate various ways to deal with various dangers, but it's hard to be exactly sure if that sheer-snip is something trivial enough, to solve through quickly tying a brick to the end, or potentially no less disasterous than sending a whole group of waiting astronauts of an impromptu grand tour of the solar system when they'd only signed on to staff a simple space-hub facility!
	:(Either way, it shouldn't be so very dangerous to those standing around that ground-station, for that particular failure, leastwise none whose reactions aren't quicker than a moment of considered common sense! Unless the cable whip-frays, but BH likely wouldn't be so casual a out it, if that was the case.) [[Special:Contributions/172.70.90.28\|172.70.90.28]] 20:38, 13 March 2024 (UTC)		:(Either way, it shouldn't be so very dangerous to those standing around that ground-station, for that particular failure, leastwise none whose reactions aren't quicker than a moment of considered common sense! Unless the cable whip-frays, but BH likely wouldn't be so casual a out it, if that was the case.) [[Special:Contributions/172.70.90.28\|172.70.90.28]] 20:38, 13 March 2024 (UTC)
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		+	-- snibbedi snab X D D
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		+	-- FUG : D

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 I can't see how these holes were supposed to ruin the whole project. Apparently, the elevator was still in one piece (although probably couldn't be used). All they had to do is to raise the base a couple of meters (the banner doesn't seem that high) so that the damaged region of the ribbon is not relevant (possibly they could even cut the ribbon right above it). Surely, it will cost a lot, but not quite as much as a new elevator. [[User:Bebidek|Bebidek]] ([[User talk:Bebidek|talk]]) 17:59, 13 March 2024 (UTC)
 :In the (theoretical) construction of a space elevator, the ribbon would be lowered downwards from geostationary orbit whilst a separate ribbon (or the other end of a 'double-wound' one) would be trailed outwards. Perhaps with a handy counterweight to make it unnecessary to have quite so much cable unspooled/generated outwards while keeping the CoG at the geostationary point.
 :Until it reaches the ground, and gets attached. Then you would rebalance (set a bit more mass outwards) to create a nonzero amount of useful tension at the landward side (over and above its 'natural dangle'. This would stabilise the system. Too much tension, and you're making problems for yourself, but too little and an attached cabin (or several!) would cause issues masses and forces are now incompatible with the 'CoG orbital point'. Enough availabls slack to let you subtly 'skip' the cable around potential collisions that you can predict.

← Older revision		Revision as of 20:38, 13 March 2024
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	I can't see how these holes were supposed to ruin the whole project. Apparently, the elevator was still in one piece (although probably couldn't be used). All they had to do is to raise the base a couple of meters (the banner doesn't seem that high) so that the damaged region of the ribbon is not relevant (possibly they could even cut the ribbon right above it). Surely, it will cost a lot, but not quite as much as a new elevator. [[User:Bebidek\|Bebidek]] ([[User talk:Bebidek\|talk]]) 17:59, 13 March 2024 (UTC)		I can't see how these holes were supposed to ruin the whole project. Apparently, the elevator was still in one piece (although probably couldn't be used). All they had to do is to raise the base a couple of meters (the banner doesn't seem that high) so that the damaged region of the ribbon is not relevant (possibly they could even cut the ribbon right above it). Surely, it will cost a lot, but not quite as much as a new elevator. [[User:Bebidek\|Bebidek]] ([[User talk:Bebidek\|talk]]) 17:59, 13 March 2024 (UTC)
		+	:In the (theoretical) construction of a space elevator, the ribbon would be lowered downwards from geostationary orbit whilst a separate ribbon (or the other end of a 'double-wound' one) would be trailed outwards. Perhaps with a handy counterweight to make it unnecessary to have quite so much cable unspooled/generated outwards while keeping the CoG at the geostationary point.
		+	:Until it reaches the ground, and gets attached. Then you would rebalance (set a bit more mass outwards) to create a nonzero amount of useful tension at the landward side (over and above its 'natural dangle'. This would stabilise the system. Too much tension, and you're making problems for yourself, but too little and an attached cabin (or several!) would cause issues masses and forces are now incompatible with the 'CoG orbital point'. Enough availabls slack to let you subtly 'skip' the cable around potential collisions that you can predict.
		+	:(Typically LEO orbits, less frequently MEO ones... polar/Sun-synchronous, and skewed orbits such as the current trend for GPS-like and/or Starlink-like 'constellations', would be a threat depending upon the precise equatorial intersections generated at the given longitude. Near-GEO would be rare, and geosynchronous-but-not-geostationary ''ought'' to be easy to deal with, but ones designed for highly elliptical and inclined orbits with long-loiter over polar regions might be awkward. Anything below LEO is more a matter of controlling the general airspace to high altitudes.)
		+	:Severing right above the anchor is probably the ''least worst'' place. The closer to GEO, the more 'upwards' force the now grossly unbalanced system succumbs to (sending the GEO waypoint station further out, quickly, maybe into solar orbit), and more ribbon is now below the cut that needs to fall. Above GEO, the GEO station is now 'down-heavy', falling out of orbit, just the counterweight end (probably a 'reaction free, centripetal launching station', where interplanetary craft can be just 'dropped' outwards at the most opportune time). In contrast, severing near the anchor will have the ''least'' amount of upwards (and driftwards) movement.
		+	:...but not insignificant. I'd be foolish to try to grab the cable before it got out of reach. It might very soon become ''me'' that is out of reach (if I don't let go again before I get too high for it to be a new problem). The tension is probably greater than my bodyweight (if the system needs to carry loads no less than myself ''plus'' the 'car' I ride in). Perhaps I should also try to hook my foot into the ground-anchor/find another handy bit of ground structure? But only if my ''own'' tensile strength is sufficient - i.e. do I compare favourably with a hi-tech carbon nanotube composite?
		+	:Unless there's some preanticipated measures, I think the cable is 'lost upwards' too quickly to engineer a re-anchoring. It might help to have emergency thrusters ready to fire, on the GEO station or even elsewhere in the cable (already useful to oscillate the cable slightly laterally when it needs to get out of the way of an orbiting or passing-through space-item). Although there's also a lot to be said for having the system, detecting a sever, automatically making additional severs of the cable just above and below the GEO station (down-cable now falls down across the Earth's surface... ''might'' not hit anything important; up-cable and counterweight station now heads outwards... emergency thrusters might be useful there to prevent unintended 'long term space tourism' by anyone manning it), so that you could at least provide the GEO station with a new cable (or material to make it) and it could ''fairly'' quickly become its own replacement.
		+	:Maybe you ''can'' grab the now free cable end. But surely the anchor would be more than just dipping the free end in wet concrete. It might (originally).have features like a properly engineered end with width and/or loops, to mechanically tie into the ground-anchor (which might be quite deep). There's friction on it enough for the 'cars' to ride up and/or down, but that's less weight, even full, than the force of tension required to deal with the presence or absence of one or more such cars.
		+	:The GEO would already probably need a still-spooled length of cable ''anyway'', to take-up/let-out a degree of inward (and outwards) ribbon under different gravitational forces (as the Moon is in conjunction/opposition to the elevator system, it would change the idealised 'GEO' height, so maybe there'd be a bimonthly cycle of adjustment to maintain CoG).
		+	:The ultimate fallback might be to (depending upon the sever being detected as close enough to ground, by the system that can at least cue up this automatic reaction for a human overseer to confirm) spool out extra 'down' (and a little extra 'up', depending upon relative masses of cable and 'nodes', letting the cable 'fall' down (still under control of GEO), along with judicious emergency thrusters (again, depending upon what is available/how the mass of the system is distributed), giving time for the ground-station to bring the "vertical towtruck" machinery into play (just out of shot from this comic frame) and have the "just touching the ground" effect as per a failing helium party balloon whose string ''alone'' is just enough to keep it from flying off (but if too much string is on the ground it rises up, until a given length is held up in equibreum).
		+	:...all engineering problems to be very closely looked at. But ''not necessarily'' until solving (conceptually, and but sufficient intermediate practical testing) the issue of the actual Space Elevator. Only then can you have an elevator system that you know enough about to exactly work out the necessary contingencies for various (foreseeable) emergency situations. One can certainly extensively postulate various ways to deal with various dangers, but it's hard to be exactly sure if that sheer-snip is something trivial enough, to solve through quickly tying a brick to the end, or potentially no less disasterous than sending a whole group of waiting astronauts of an impromptu grand tour of the solar system when they'd only signed on to staff a simple space-hub facility!
		+	:(Either way, it shouldn't be so very dangerous to those standing around that ground-station, for that particular failure, leastwise none whose reactions aren't quicker than a moment of considered common sense! Unless the cable whip-frays, but BH likely wouldn't be so casual a out it, if that was the case.) [[Special:Contributions/172.70.90.28\|172.70.90.28]] 20:38, 13 March 2024 (UTC)

← Older revision		Revision as of 17:59, 13 March 2024
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	It’s written in Common Meter (mostly) which means that it fits to quite a number of tunes (especially if one is prepared to force the syllables a bit). The second line is the main one to break a little from this but with a bit of effort it can be sang to O Little Town or Bethlehem or even the Original Pokemon Theme.		It’s written in Common Meter (mostly) which means that it fits to quite a number of tunes (especially if one is prepared to force the syllables a bit). The second line is the main one to break a little from this but with a bit of effort it can be sang to O Little Town or Bethlehem or even the Original Pokemon Theme.
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		+	I can't see how these holes were supposed to ruin the whole project. Apparently, the elevator was still in one piece (although probably couldn't be used). All they had to do is to raise the base a couple of meters (the banner doesn't seem that high) so that the damaged region of the ribbon is not relevant (possibly they could even cut the ribbon right above it). Surely, it will cost a lot, but not quite as much as a new elevator. [[User:Bebidek\|Bebidek]] ([[User talk:Bebidek\|talk]]) 17:59, 13 March 2024 (UTC)

← Older revision		Revision as of 00:21, 29 October 2021
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	In reality, I believe that any space elevator would be nearly perfectly balanced, to the point that it would not even need to necessarily be connected to the ground. That is of course why a space elevator in and of itself is possible and why a material with great tensile strength is needed, as it would be perfectly balanced. {{unsigned ip\|108.162.245.170}}		In reality, I believe that any space elevator would be nearly perfectly balanced, to the point that it would not even need to necessarily be connected to the ground. That is of course why a space elevator in and of itself is possible and why a material with great tensile strength is needed, as it would be perfectly balanced. {{unsigned ip\|108.162.245.170}}
		+	: Attaching to the ground provides stability to some designs. It does not need to be perfectly balanced as the moving cargo will be changing the center of mass anyway. [[User:SDSpivey\|SDSpivey]] ([[User talk:SDSpivey\|talk]]) 00:21, 29 October 2021 (UTC)

← Older revision		Revision as of 10:51, 3 May 2021
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	I find it cool there is a melody "Cerebral Plumbing" by Rom di Prisco, which fits the pattern of the poem. [[Special:Contributions/141.101.104.201\|141.101.104.201]] 07:21, 28 July 2019 (UTC)		I find it cool there is a melody "Cerebral Plumbing" by Rom di Prisco, which fits the pattern of the poem. [[Special:Contributions/141.101.104.201\|141.101.104.201]] 07:21, 28 July 2019 (UTC)

−	It’s written in Common Meter (mostly) which means that it fits to quite a number of tunes (especially if one is prepared to force the ~~syllabus~~ a bit). The second line is the main one to break a little from this but with a bit of effort it can be sang to O Little Town or Bethlehem or even the Original Pokemon Theme.	+	It’s written in Common Meter (mostly) which means that it fits to quite a number of tunes (especially if one is prepared to force the syllables a bit). The second line is the main one to break a little from this but with a bit of effort it can be sang to O Little Town or Bethlehem or even the Original Pokemon Theme.

← Older revision		Revision as of 10:50, 3 May 2021
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	I find it cool there is a melody "Cerebral Plumbing" by Rom di Prisco, which fits the pattern of the poem. [[Special:Contributions/141.101.104.201\|141.101.104.201]] 07:21, 28 July 2019 (UTC)		I find it cool there is a melody "Cerebral Plumbing" by Rom di Prisco, which fits the pattern of the poem. [[Special:Contributions/141.101.104.201\|141.101.104.201]] 07:21, 28 July 2019 (UTC)
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		+	It’s written in Common Meter (mostly) which means that it fits to quite a number of tunes (especially if one is prepared to force the syllabus a bit). The second line is the main one to break a little from this but with a bit of effort it can be sang to O Little Town or Bethlehem or even the Original Pokemon Theme.

← Older revision		Revision as of 07:21, 28 July 2019
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	The Burma Shave connection is weak. The signs used only three or four syllables per line and just one rhyme (e.g., "Ben met Anna / Made a hit / Neglected beard / Ben Anna split"), and the "Burma Shave" was on a fifth, separate sign, not part of the rhyme. [[User:Gmcgath\|Gmcgath]] ([[User talk:Gmcgath\|talk]]) 20:23, 25 October 2016 (UTC)		The Burma Shave connection is weak. The signs used only three or four syllables per line and just one rhyme (e.g., "Ben met Anna / Made a hit / Neglected beard / Ben Anna split"), and the "Burma Shave" was on a fifth, separate sign, not part of the rhyme. [[User:Gmcgath\|Gmcgath]] ([[User talk:Gmcgath\|talk]]) 20:23, 25 October 2016 (UTC)
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		+	I find it cool there is a melody "Cerebral Plumbing" by Rom di Prisco, which fits the pattern of the poem. [[Special:Contributions/141.101.104.201\|141.101.104.201]] 07:21, 28 July 2019 (UTC)

← Older revision		Revision as of 20:23, 25 October 2016
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	I'm pretty sure you guys missed the reference to Burma Shave. The setup of the text is identical to the "burma shave" campaign (4 rhyming lines + "Burma Shave"). In this case Pruning Shears is used instead of Burma Shave which sounds quite similar (this is why he choose that over "scissors" or similar). See comic 491 for another reference. [[Special:Contributions/188.114.102.169\|188.114.102.169]] 15:11, 24 August 2016 (UTC) msx80		I'm pretty sure you guys missed the reference to Burma Shave. The setup of the text is identical to the "burma shave" campaign (4 rhyming lines + "Burma Shave"). In this case Pruning Shears is used instead of Burma Shave which sounds quite similar (this is why he choose that over "scissors" or similar). See comic 491 for another reference. [[Special:Contributions/188.114.102.169\|188.114.102.169]] 15:11, 24 August 2016 (UTC) msx80
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		+	The Burma Shave connection is weak. The signs used only three or four syllables per line and just one rhyme (e.g., "Ben met Anna / Made a hit / Neglected beard / Ben Anna split"), and the "Burma Shave" was on a fifth, separate sign, not part of the rhyme. [[User:Gmcgath\|Gmcgath]] ([[User talk:Gmcgath\|talk]]) 20:23, 25 October 2016 (UTC)