Oltux72

We do not see details of spanreed usage often. I have found some relatively good descriptions @Pagerunner may also find this informative Dalinar - Jasnah Shallan - the Davar estate Shallan - Tyn's employer Jasnah - her agents Adrotagia - multiple correspondents Amaram - Restares From those I draw some conclusions spanreeds need Stormlight while activated but not writing, that is with the signal light flashing, you can run around with them. We have multiple scenes of servants carrying them they board they rest on must be levelled to be used the spanreed itself, however, is placed by hand the spanreed is placed on the upper left position marked by a dot by convention to start a conversation The ruby is at leat in some cases on the side of the reed Shallan's family thinks that a spanreed cannot be used on the ocean The spanreed and the board are not paired. Shallan used a random board once Adrotagia once set surrounded by spanreeds on boards.

Yes, exactly. But is that a convention or is there a technical reason? Yes, or worse, breaking the spanreed, which is not exactly cheap. However, that is an assumption. I have found nothing in the text pointing to that conclusion. Have you? I think this deserves a thread of its own.

A few borderline or unknown cases: Deep Ones of Threnody The Evil of Threnody Aviars The Set's Faceless Immortals some Unmade (unless you count them as spren)

Good point. I think, but that is a personal opinion I cannot find textual support for, that it is a social signaling function. "Please write; I am done"

I am afraid that is not the case. You write with them on paper. Both of them are dragged across paper which will cause friction. Presumably that is the reason they take so much care to level them. You'd ram one of them into the wood, respectively the other one would cease writing, as it is floating through the air.

While that is possible it does not solve the full problem. To an outside observer different parts of the vehicle move at different speeds. To the spanreeds that is not the case. They see each other as at rest with respect to the other one.

At that time, if we can believe Nazh, Threndodites intentionally made Cognitive Shadows. Native Cognitive Shadows in the Scadrian system were random flukes if tehy existed at all. Hence it looks likely that the Threnodites knew most about Cognitive Shadows and that the vast majority of CSs were from Threnody. The Ire made a reasonable assumption.

Well, in which way? Speed bubbles have a defined volume and boundaries. The effect of conjoined fabrils lacks both.

The wheel must simply turn without the spanreeds making a difference and the spanreeds must join and you could use them to write a letter.

But in the end result it won't go faster. Second thought experiment. We take a turning disc. We mount one spanreed at the rim, the other one half way between the nave and the rim, where the other one is. We make the disc rotate and then switch them on. Based on that they work on Roshar, this must work, must it not?

Yes, that is the main part of the question. The other part is how orientation is transfered That is the question. Does this apply to arcane questions in the Cosmere? Are they, just for the sake of argument, all relative to Adonalsium's corpse? We cannot a priori rule that out. Shallan's sister-in-law regarded the use of a spanreed in a ship as impossible. I think for spanreeds movement is measured relative to the other spanreed. The paper and its holder seem to be mere paraphernalia without arcane functions. Presumably you cannot move as if you were holding onto the cart.

But they have dark eyes.

Which dahn are Lirin, Hesina and Oroden now? They are not lighteyed. Yet Oroden is theoretically Kaladin's heir. First dahn? EDIT: First nahn

Then why did she stop using it?

Urithiru would be in the middle of an ocean. You can transfer near a Spren City. But that is where the Fused are. If everything goes right. If you need to flee from the Fused into the wilderness, you will be in deep trouble. Whenever you add somebody to carry stuff, he will need to eat and drink. Or are you suggesting they act like early expeditions to Antarctica and feed the unneeded pack animals to the other pack animals? But you cannot eat that stuff. If you could they wouldn't need to trade cans or use ice to condense water out of the air. Yes, It doubles your supply. But no more. A Raidiant's spren cannot get too far from the Knight. They would need to hire a group of porters in advance.

What makes you think that Susebron would ask her? He'd simply give her enough Breaths for Fifth Heightening.

I am afraid I need to point out that we are about to see a shortage of spren. And she is not the protective type. She goes for high risk, high reward. Elsecaller, Dustbringer, but no Windrunner. Do we know who is the active part in this, Laral or Roshone? While you are running a war, you have to keep your production base working. They need to eat and spears do not make themselves. Again. The Roshone household has such a connection. Roshone himself once had the ear of the king. You are attributingm to Laral personally what is not necessarily hers. Did her father have one? That is exactly why you cannot allow that. You'd set a precedent for hundrous of little aristocrats building power bases in Urithiru. Worse you'd have somebody from Sadeas in command of parts of Urithiru. Plus it would look like the best way to get an office in Urithiru would be to have light eyes and to be a childhood buddy of Kaladin's.

The center of the planet would see it that way. The objects do not. And this is no theoretical diffrence either. You could send a radio signal from a gem on the ground to a gem in a vehicle and you would observe doppler shifting. You would not see that if you sent a signal to a gem further north or south. Furthermore the users of spanreeds surely are not subject to Coriolis force. Let me propose a thought experiment. You attach two spanreeds to a rope. One halfway down and one at the end. You start twirling the rope around you. What happens?

So what exactly will happen, if you do join them at movement? The Ars Arcanum just says that force is conserved. But she says nothing about momentum. Is the spanreed in the moving vehicle yanked backwards and the other half hurled into the direction the vehicle is moving?

@Pagerunner 's thoughts about conjoined fabrials made me look at fabrials. Looking at Navani's platform, one thing struck my mind. What determines when they can join? With a spanreed, you can demand that both sides can be at rest with respect to each other. But with a reverser fabrial that can obviously be the case only with fabrials at rest. Yet Navani's platforms actually stay connected while they are lifted and lowered. So is that necessary for a spanreed? We have this from Words of Radiance: This is not as good as it seems, as it may be impossible because a vehicle would be shaking. So what are the exact criteria for using a spanreed?

There no longer is a Hearthstone to lead. That they will leave small groups to be led by some random aristocrat in Urithiru looks rather unlikely.

Well, no. Not everybody would agree to that. Navani is poetic here, as she should. Soaring has two components, going up and staying up. They may be divided and it is unclear what she is refering to. Let me quote it: She is alternating between "controls of movement". Now what does that mean? Granted the text is obviously not a technical treatise, but controlling at least horizontal movement means changing it, that is actively moving the ship. So to take controlling vertical movement meaning to keep the ship at constant height looks like the less likely reading. Nothing in that quote says that the lattices cannot be connected at the same time. They merely are moved at the same time. Please elaborate. I understood your explanation just using "isolate plane of motion" as a precursor to the the phrase and even change the vectors of force, which rests on the condition that conjoined fabrials work on cardinal directions. This may be the core of the matter, so please explain again. I fully agree in theory. Yet I feel I must say that you are doing this by assuming spanreeds by working in cardinal directions, while the texts describe meticulous levelling with devices made for them but no effort to orient them north/south. The starting point for the reed is even the top left corner, not a geographical designation.. I would say that the Sorry, the aluminium allows for something the old scheme cannot do, or will do much worse. It looks to me like we disagree on what that impossible feat is. Now, Under Navani's old scheme the chull lattice would need to do an empty run to the other edge (assuming cardinal directions apply) both lattices could be active only at a dead rest Fourth Bridge could never drift do we agree on what is impossible? Sorry. I will try to do better. Well, the full quote is: "then be turned around—the gemstones temporarily disjoined—to march back the other direction, as all the while the airship continued in a straight line." (emphasis mine) I am afraid our disagreement is on how literally we take "all the while" If I understand your proposal correctly I think they must operate as follows straight line - stop - ------------------------------------------------------------------ - straight line (Fourth Bridge) forward leg - stop - switchover and turn under aluminium and switchover - backward leg (Chull Base) While I propose straight line - coast - straight line forward leg - conventional disjoint - backward leg Right, my apologies. I just think that if we propse a terminology, it better be as precise and comprehensive as possible They are using carpenter's levels and recheck - it need not be horizontal to the plain eye The spanreed will not work on a ship No compass mentioned ever Well, no, let me quote again I am taking that literally. The ship is moving all the time, including during the turns. Yes, but the conclusion that you need aluminium to do that rests on spanreeds needing cardinal directions, doesn't it? How? What holds the ship up when you do that? No. You just let your chulls accelerate and at some point in time they will sync. Yes, that depends on nothing happening at all when you try to sync at the wrong speed. That calculation is correct but depends on an inability to do a "running sync" I was assuming a system of a freely swinging counter weight. You can attach it to a cliff wall, if you have Windrunners. My mistake. You are correct. Well, no for we have no idea how often they are changing teams. Not easily. You are correct. It is not inconsistent. Should I have implied so, sorry. But it is harder to achieve. Right. Too many unknowns. If I may add, what is marching speed on a low gravity, high oxygen world? Most likely.

That is the problem. It will not work. Both parts of the fabrial need to proceed at the same speed.you may use gears between the engine and the fabrial for speed, but increasing force without speed is useless.

His wife is captain. He is not going to leave heralone. Aluminium is not all that great as a weapon. It is actually much better suited to armor.

What could be more secure than having your engines and lift cells in a deep, well defended bunker? This is Autonomy speaking, not safety or security.