Creating 2 speed bubbles, possible FTL?

[Wadders]

In the preview chapters we see a slow bubble being made using the allomantic grenade and then a speed bubble used to selectively speed up what is happening inside in a smaller area.

Would a full mistborn be able to use this to create a shell of slow time with them being unaffected?

Also could the reverse of this be how FTL is created with allomancy? You create a shell of faster time outside the ship so that in the space the ship travels through the speed of light is faster relative to the ship.

Edited November 7, 2022 by Wadders

[Firesong she/her]

Doubt it, as we see that the area in which two opposite bubbles intersect tend to cancel each other out and return to normal time. Also, what are you trying to say in that last paragraph? Sorry, but I just can't really make it out, can you try rewording it?

[Requiem17 she/her]

I'll try rewording it in the silly way it made sense to me. 

So Wayne can make a speed bubble right, and from the outside it looks like he leaps from one side of the bubble to the other simultaneously. 

Problem for him is that he ages while in that bubble. 

Now imagine he had a tiny Allomantic grenade that just encapsulated his body, but was standing on a skateboard that was already moving. 

From the outside he still leaps from one end of the speed bubble to the other, but for him time passes slowly. 

Then you just do this so both speed bubbles are attached to grenades, and the speed bubble is larger than the slow bubble. The skateboard becomes the ship. The ship moves through the speed bubble, and the people on the ship have tiny slow bubbles. 

[Wadders]

13 hours ago, Firesong said:

Doubt it, as we see that the area in which two opposite bubbles intersect tend to cancel each other out and return to normal time.

The key would be shaping the speed bubble to be smaller than the slow bubble so you have a shell of slow time around the user in normal time. Not sure it would be that useful most of the time but I can see it having some niche uses for a mistborn

 

10 hours ago, Requiem17 said:

I'll try rewording it in the silly way it made sense to me. 

So Wayne can make a speed bubble right, and from the outside it looks like he leaps from one side of the bubble to the other simultaneously. 

Problem for him is that he ages while in that bubble. 

Now imagine he had a tiny Allomantic grenade that just encapsulated his body, but was standing on a skateboard that was already moving. 

From the outside he still leaps from one end of the speed bubble to the other, but for him time passes slowly. 

Then you just do this so both speed bubbles are attached to grenades, and the speed bubble is larger than the slow bubble. The skateboard becomes the ship. The ship moves through the speed bubble, and the people on the ship have tiny slow bubbles. 

This is pretty much what I mean except that both bubbles are anchored to the ship (I think there have been WoB's where he has said bubbles get anchored to a large object, which would make sense for them to work at all). So in the centre you have the crew area in a slow bubble with a speed bubble exetended beyond it to encompass whatever propusion method they use and a sliver of space around the ship. Within the slow bubble it cancels out the speed bubble effects so you have normal time in the crew area but the ship itself will be travelling faster due to the shell of faster time.

[notsawerd]

A Time shield would be cool to see and would have a few applications related to defensive and offense.

[Wadders]

Has there been anywhere that the allomatic grenade has been moved after it set up a bubble? I'm guessing it would function like someone creating a bubble normally, in that it doesnt move the bubble and the bubble collapses if the grenade leaves.

[Requiem17 she/her]

This gets into relativity stuff now but the thing/person creating the bubble has to consider themselves stationary relative to the thing around them, i.e. Marasi activating a slow bubble on a train & it moving with the train. 

So imagine an engine block in the ship. That engine block considers itself stationary relative to the ship & it's the thing creating the speed bubble. So the engine considers itself in the center of it's speed bubble constantly, but the ship continues to move through it, because it just happens to be a massive bubble. 

[Wadders]

After reading lost metal I have a slight alteration to my theory in that the both the speed and slow bubles would need to be duralumin enhanced. At the end of the book we see that wayne has a speed bubble so fast that he can no longer see outside which implies to me that within his speed bubble he is now moving faster than light outside the bubble.

So if you have a speed bubble affecting the overall ship and engines at that speed counteracted by a slow bubble in the crew areas you have FTL!

EDIT: Also for a deflector a giant enhanced steel bubble

Edited November 16, 2022 by Wadders