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Post by the light works on Apr 30, 2016 7:48:23 GMT
View AttachmentI've clocked average speeds of 30 MPH, in 40 MPH winds. one guy made plastic skis and he could get 75% of wind speed with a third the sail area I preferred to use. OK, so, suggestion, get a large pair of ski's, maybe a sail, and get to speed with that. If you were to go with a different form of propulsion over sand, would a propeller be your first choice?... I didnt think so.  Strapping a prop to your backside, maybe not so good. However.... Strapping the prop from an Air-Boat, or Hovercraft, the ones that do air propulsion, maybe even a micro-light engine and prop...?... Yeah, that may work. But of your propulsion was against the sand, you would choose a wheel over a prop, even if boat owners refer to the prop as the wheel, that dont mean they even think it would work on mud, let alone sand.?... the original question being whether a boat prop would provide propulsion in sand, I think we can safely say no. |
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Post by silverdragon on Apr 30, 2016 8:35:03 GMT
OK, so, suggestion, get a large pair of ski's, maybe a sail, and get to speed with that. If you were to go with a different form of propulsion over sand, would a propeller be your first choice?... I didnt think so. Strapping a prop to your backside, maybe not so good. However.... Strapping the prop from an Air-Boat, or Hovercraft, the ones that do air propulsion, maybe even a micro-light engine and prop...?... Yeah, that may work. But of your propulsion was against the sand, you would choose a wheel over a prop, even if boat owners refer to the prop as the wheel, that dont mean they even think it would work on mud, let alone sand.?... the original question being whether a boat prop would provide propulsion in sand, I think we can safely say no. To be honest, its more of a not very efficiently and not for very long.... In what I experienced as damage, it was exactly like running the prop at high speed against a sanding disk. Which it was exactly. Noting that shaping a prop s often done in this way with a high strength grinding disk after casting, that is the problem. We are thinking along the lines of for instance If you make a propeller shaft out of wood and set it to run resting on a 40grit sanding sheet, how long you expect it would last?... replace the sanding sheet with a bucket of sand?... [course grain] Same again with Aluminium shaft. Same again with Bronze, which many props are made from. |
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Post by ironhold on Aug 6, 2016 21:01:27 GMT
"Pizza Pi Party"Transformers: Rescue Bots episode #94 Original US air date: 6 August 2016 A scientist has developed a new type of "super" yeast that only requires 1/10th the normal amount in order to get the same yield. The yeast is unveiled during a pizza festival, and an accident results in the entire batch being mixed in with a large quantity of dough intended for use by the various pizza makers. The resulting combination is such that the park is quickly overcome with dough, and it is now spreading out towards town. The town has recently purchased a number of dual-surface solar panels. One surface is a normal energy-gathering solar panel, while the other surface is capable of taking the energy and reflecting it back at a targeted point. The plan is for the town's first responders to use a large quantity of salt to slow the rising of the yeast while the town's civil engineers arrange these dual-surface solar panels so that they can be used as a massive solar oven. 1. The reason why the first responders are able to get so much salt so quickly is because the previous winter they bought a massive amount for use in salting the roads. However, some secondary characters identify this "road salt" as being regular NaCl, and in fact the cooked dough is regarded as being edible (even if it is too salty for most). Could NaCl be used as road salt? 2. Is it possible to create solar panels of the type described in the show?
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Post by mrfatso on Aug 6, 2016 23:17:47 GMT
Yes road salt here in the UK is ordinary salt mined mostly in Cheshire near where Silverdragon lives, they put a few additives that are anti caking agents but those are the same ones used in table salt and are food safe. You could eat it if you really wanted, I would not want to though, www.saltassociation.co.uk/de-icing-roads/de-icing-environment/ The solar panels remind me of the idea of a solar furnace power plant where mirror focus the Suns energy to a single point, but there is no point in having ones that act both as that and as ordinary solar panels. You either need to extract the energy in the manner of a normal solar cell, or as a solar furnace trying to,do both would not work as you cannot use the same energy twice. |
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Post by the light works on Aug 7, 2016 2:08:53 GMT
I also have the same opinion that if it is road salt, it is probably chemically the same as table salt, though it may not be iodized. however, I would question whether it is stored in such a way as to be free of dirt.
as for solar panels that are photoelectric cells on one side and reflective on the other, I don't see why it couldn't be done. - I also can't see an immediate benefit.
the one missed was what the maximum expansion of yeast dough is. more yeast will make it rise faster, but there are limits to how big the air bubbles can be before they start rupturing.
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Post by mrfatso on Aug 7, 2016 10:16:41 GMT
I also have the same opinion that if it is road salt, it is probably chemically the same as table salt, though it may not be iodized. however, I would question whether it is stored in such a way as to be free of dirt. as for solar panels that are photoelectric cells on one side and reflective on the other, I don't see why it couldn't be done. - I also can't see an immediate benefit. the one missed was what the maximum expansion of yeast dough is. more yeast will make it rise faster, but there are limits to how big the air bubbles can be before they start rupturing. I agree with you there on all points I think. The salt would not be iodised but then again most table salt in the UK is not either, due to our geology and other factors it is considered that in most areas people will get enough iodine from their diet. Some areas of the UK do recommend iodised salt due to the local conditions. The way that it is stored not being dirt free would be one of the reasons Imwould not want to eat it. There is not technical reason you could not build solar panels that way, I just do not see any reason for it. |
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Post by silverdragon on Aug 8, 2016 7:31:58 GMT
The difference between Road salt and Table salt?... Sand.
Otherwise, its NaCl. Sodium Chlorine.
Of course table salt is "processed" to remove other lumps of rock.
Its washed... the rocks drop, the salt floats, dissolved into brine.
But road salt has sand thrown in, the same pulverized ground up rocks that have been washed out of the table salt.
To get to table salt, the rocks are ground up, washed, and "evaporated", either by being put in salt pans and air-sunlight evaporation, or by heat.
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Post by ironhold on Oct 10, 2016 21:03:50 GMT
Hoo boy. "To Infinity... And Back"Transformers: Rescue BotsOriginal US Air Date: October 8, 2016 The focus of the episode is a test run for a solar sail space craft. The science in this one is so bad that Dr. David Van Dommelin, a physics prof who is also a prominent member of the Transformers fandom, needed aspirin after watching it. Various other items in here are so bad that people have noted that lawsuits for negligence would be pending if this was real. Among other things: *The ship is equipped with lasers that are supposed to substitute for solar energy when the ship is in the shadow of a planet. *What is described as "space debris from a dead satellite is enough to seriously damage the ship, such that the controls are affected and the sails are destroyed. *Somehow, going for a space walk in order to fix some of the damage will cost the pilot much of her oxygen supply. No airlock? |
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Post by the light works on Oct 11, 2016 0:06:58 GMT
Hoo boy. "To Infinity... And Back"Transformers: Rescue BotsOriginal US Air Date: October 8, 2016 The focus of the episode is a test run for a solar sail space craft. The science in this one is so bad that Dr. David Van Dommelin, a physics prof who is also a prominent member of the Transformers fandom, needed aspirin after watching it. Various other items in here are so bad that people have noted that lawsuits for negligence would be pending if this was real. Among other things: *The ship is equipped with lasers that are supposed to substitute for solar energy when the ship is in the shadow of a planet. *What is described as "space debris from a dead satellite is enough to seriously damage the ship, such that the controls are affected and the sails are destroyed. *Somehow, going for a space walk in order to fix some of the damage will cost the pilot much of her oxygen supply. No airlock? the lasers would seem to fall under the "blowing your own sail" category, which has ultimately been deemed possible, but hardly efficient. the current biggest CONFIRMED threat in space travel is hitting debris. and without seeing the ship, I can not eliminate the possibility it was not built with an effective airlock. |
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Post by ironhold on Sept 6, 2017 23:53:29 GMT
Linking to the first half of the video so that it can be seen:
edit - it starts about the 3:30 mark if you want to skip right to it
This is from the 5th episode of the 2001 "Robots In Disguise" series, "The Hunt For The Black Pyramid" (original US air date varies widely due to 9/11).
One of the central elements of the episode is a new type of underwater exploration vessel. How it works is that when the mother ship gets to a specific spot, it somehow manages to rotate 90 degrees, setting its bow down into the surface of the ocean floor. The bridge likewise rotates 90 degrees, and begins to lower a secondary command module that serves as an underwater observation platform.
How would something like this even work?
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Post by the light works on Sept 7, 2017 2:20:47 GMT
Linking to the first half of the video so that it can be seen: edit - it starts about the 3:30 mark if you want to skip right to it This is from the 5th episode of the 2001 "Robots In Disguise" series, "The Hunt For The Black Pyramid" (original US air date varies widely due to 9/11). One of the central elements of the episode is a new type of underwater exploration vessel. How it works is that when the mother ship gets to a specific spot, it somehow manages to rotate 90 degrees, setting its bow down into the surface of the ocean floor. The bridge likewise rotates 90 degrees, and begins to lower a secondary command module that serves as an underwater observation platform. How would something like this even work? I assume that means the bridge remains above the surface obviously that would limit the depth it could operate in - but within those limits, a person could probably engineer something of that nature. whether it was useful is up for debate. build a boat with ballast tanks in the bow. the bridge structure would have to be on a huge pivot system, but the submersible observation platform could be a part of the whole assembly. you could theoretically also make the entire ship submersible, but that would take more engineering. |
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Post by silverdragon on Sept 10, 2017 14:07:00 GMT
Flooding the bow section would allow it to happen...
However.. "Titanic" moment here, the spine of the ship, if not heavily strengthened, would cause the whole ship to snap in half.
Also, flooding the forwards compartments, the extreme pressure of doing that would blow out the walls of the compartments.
Then you have the question of the engine.
Of course you could just design an engine compartment that sits right on the moment of rotation... but that would mean you need to know the depth of the water you intend to sing the ship in?.
With all the extra weight of the heavy engineering, how you get the thing to float?.
Also, that "Control deck" that rotates...
The rest of the ship, including the bridge?.. I didnt see any of that rotating?..
What you going to walk down the walls now?.
Can it be done?..
Yes.
Just "Not yet", I dont think we have the knowledge to make a ship that rotates like that, without things falling about inside.
Like all the cargo.
The engineering needed to keep everything right side up, including catering department for everyone crewing the ship, is probably hellishly prohibitive.
I dont see why the cant just cut a hole in the centre of the ship and lower an expendable [..sod that auto-correst?./. expendable?//] Extendible.. lift shaft "downwards" to the bottom of the ocean... or just crane off the submersible part on a long cable, like they do with modern exploration ships we have now?..
Its not that we couldnt, I expect its more KISS, Keep It Simple.
Why rotate a whole ship 90degree when its only the small control box that needs to go down?.
Submersibles have a long way to go before we can take humans to the bottom of the oceans in safety on a regular basis yet..
But we are getting there.
And I am watching...
Because watching all the new stuff is less boring than watching all the endless repeats of friends and jacka$$ on TV?..
"We know more about the surface of the moon...." you know that sound-bite?..well, Can I say I am happy to report that we are catching up fast.... VERY fast...
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Post by the light works on Sept 10, 2017 14:24:24 GMT
Flooding the bow section would allow it to happen... However.. "Titanic" moment here, the spine of the ship, if not heavily strengthened, would cause the whole ship to snap in half. Also, flooding the forwards compartments, the extreme pressure of doing that would blow out the walls of the compartments. Then you have the question of the engine. Of course you could just design an engine compartment that sits right on the moment of rotation... but that would mean you need to know the depth of the water you intend to sing the ship in?. With all the extra weight of the heavy engineering, how you get the thing to float?. Also, that "Control deck" that rotates... The rest of the ship, including the bridge?.. I didnt see any of that rotating?.. What you going to walk down the walls now?. Can it be done?.. Yes. Just "Not yet", I dont think we have the knowledge to make a ship that rotates like that, without things falling about inside. Like all the cargo. The engineering needed to keep everything right side up, including catering department for everyone crewing the ship, is probably hellishly prohibitive. I dont see why the cant just cut a hole in the centre of the ship and lower an expendable [..sod that auto-correst?./. expendable?//] Extendible.. lift shaft "downwards" to the bottom of the ocean... or just crane off the submersible part on a long cable, like they do with modern exploration ships we have now?.. Its not that we couldnt, I expect its more KISS, Keep It Simple. Why rotate a whole ship 90degree when its only the small control box that needs to go down?. Submersibles have a long way to go before we can take humans to the bottom of the oceans in safety on a regular basis yet.. But we are getting there. And I am watching... Because watching all the new stuff is less boring than watching all the endless repeats of friends and jacka$$ on TV?.. "We know more about the surface of the moon...." you know that sound-bite?..well, Can I say I am happy to report that we are catching up fast.... VERY fast... for some reason my brain is telling me, this morning, that somebody built a boat that tips bow down for some reason. but I don't know if it is just pranking me, or what it would have been used for. |
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Post by silverdragon on Sept 10, 2017 14:56:24 GMT
Flooding the bow section would allow it to happen... However.. "Titanic" moment here, the spine of the ship, if not heavily strengthened, would cause the whole ship to snap in half. Also, flooding the forwards compartments, the extreme pressure of doing that would blow out the walls of the compartments. Then you have the question of the engine. Of course you could just design an engine compartment that sits right on the moment of rotation... but that would mean you need to know the depth of the water you intend to sing the ship in?. With all the extra weight of the heavy engineering, how you get the thing to float?. Also, that "Control deck" that rotates... The rest of the ship, including the bridge?.. I didnt see any of that rotating?.. What you going to walk down the walls now?. Can it be done?.. Yes. Just "Not yet", I dont think we have the knowledge to make a ship that rotates like that, without things falling about inside. Like all the cargo. The engineering needed to keep everything right side up, including catering department for everyone crewing the ship, is probably hellishly prohibitive. I dont see why the cant just cut a hole in the centre of the ship and lower an expendable [..sod that auto-correst?./. expendable?//] Extendible.. lift shaft "downwards" to the bottom of the ocean... or just crane off the submersible part on a long cable, like they do with modern exploration ships we have now?.. Its not that we couldnt, I expect its more KISS, Keep It Simple. Why rotate a whole ship 90degree when its only the small control box that needs to go down?. Submersibles have a long way to go before we can take humans to the bottom of the oceans in safety on a regular basis yet.. But we are getting there. And I am watching... Because watching all the new stuff is less boring than watching all the endless repeats of friends and jacka$$ on TV?.. "We know more about the surface of the moon...." you know that sound-bite?..well, Can I say I am happy to report that we are catching up fast.... VERY fast... for some reason my brain is telling me, this morning, that somebody built a boat that tips bow down for some reason. but I don't know if it is just pranking me, or what it would have been used for. Sort of... One such use, Oil rigs, built and towed out on their side, for ease of transportation, then flood the legs, that sink, and leave the deck above water?. Thats just the superstructure, no unnecessary parts at that time. Onec tilted, all the gear is transported on from accompanying ship. |
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Post by the light works on Sept 10, 2017 15:03:09 GMT
for some reason my brain is telling me, this morning, that somebody built a boat that tips bow down for some reason. but I don't know if it is just pranking me, or what it would have been used for. Sort of... One such use, Oil rigs, built and towed out on their side, for ease of transportation, then flood the legs, that sink, and leave the deck above water?. Thats just the superstructure, no unnecessary parts at that time. Onec tilted, all the gear is transported on from accompanying ship. It may well have been a core drilling platform. stsnd it up on end to make it less wobbly. I know I've also seen derrick ships that just have a hole through the middle, though. |
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Post by ironhold on Sept 14, 2017 4:45:28 GMT
tfwiki.net/wiki/Volcano_(episode)The bad guys have decided to tap an active volcano for geothermal energy. Thing is, the three least competent soldiers in the crew have been sent to actually explore the cave system underneath it, and a few careless laser blasts later they've triggered seismic activity that has set in motion an eruption. Optimus, as a stop-gap, uses his "Blizzard Blaster" to freeze the lava at the top of the caldera, the idea being that it'll buy the good guys some time to dig a trench that'll hopefully lead the bulk of it away from a nearby resort hotel. One would think, however, that anything cold enough to outright freeze lava would be super-heated straight into steam during the first few moments at least, and there's the whole bit about the top layer freezing into ice instead of simply cooling into stone.
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Post by mrfatso on Sept 14, 2017 6:03:53 GMT
That would not work, lava as you say would cool to stone not ice and would make the eruption worse as the gases underneath build up increasing the pressure.
Volcanoes like Mona Loa in Hawaii have a stead eruption of lava in a relatively safe state, Mount St Helens had a solid plug that meant the pressure build up until the flank blew out.
Ice would simply flash straight away into steam, this could generate Lahars that would also threaten people living near by. In 1986 the volcano Nevado Del Ruis erupted and the glacier at its summit melted generating lahars, volcanic mudslides that killed 25000 people .
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Post by the light works on Sept 14, 2017 13:52:01 GMT
on the other hand, Iceland has successfully used water to redirect lava floes.
and we have to know the mechanics of how the blozzard blaster works to know what would happen.
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Post by mrfatso on Sept 14, 2017 14:47:42 GMT
Yes it did redirect lava flows not the magma, once the magma in a volcano has erupted at the surface the gases in it out gas so lava flows don't have the same amount of gases in them.
Magma in a volcano still has all those gases in it and if they cannot reach the surface and release into the atmosphere then that is what causes an explosive eruption .
Basically you have a system where the pressure is constantly building up and we all,know what happens when a water heater has too much pressure.
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Post by the light works on Sept 14, 2017 15:34:21 GMT
Yes it did redirect lava flows not the magma, once the magma in a volcano has erupted at the surface the gases in it out gas so lava flows don't have the same amount of gases in them. Magma in a volcano still has all those gases in it and if they cannot reach the surface and release into the atmosphere then that is what causes an explosive eruption . Basically you have a system where the pressure is constantly building up and we all,know what happens when a water heater has too much pressure. don't forget I live close enough that I heard the May 18th eruption. |
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