r/CharacterRant • u/waitletmepoopfirst • Dec 14 '16

[Fancalc Alert] Toneri's moon slice speed

After it was brought up recently I went back and took a look at the feat to get a clearer picture.

Toneri's sword starts expanding right after this point, at 5:14. We have no idea how to calculate how much it initially expands in the first large frame because we don't get a full image of it, but we do hear the same sound effect used for the expansion continue in the background until Toneri begins swinging his arm down at 5:21, when it changes to a different sound effect to describe the slash.

First of all, even trying to calc the extension time frame in this manner is extremely iffy because we have no idea if the blade was actually done expanding to its full length during any point in that window, or if it continued expanding while he started cutting.

That gave us a 7 second time frame btw.

Another method we could use is Toneri actually cutting the moon, which begins at 5:26 and ends at 5:33.

This is also a 7 second time frame.

The diameter of the moon is 3474 km = 3474000 m. But as seen in KerdicZ's comment the blade was actually probably about a fifth longer than the moon, or 4168800 m.

3474000/7=496286 m/s

496286/340 (the speed of sound in air) = Mach 1460, for the second method of the blade slashing the moon.

Using the first method (blade's expansion) gives us:

4168800/7 = 595543 m/s

595543/340 = Mach 1752

It's important to note that Toneri's arm speed should actually be below that because his arm just acted as a fulcrum for the blade, but that's even more unquantifiable so we'll just go with Mach 1460. At the very least, Naruto would have been reacting and running toward the blade that had Mach 1460-Mach 1752 speed.

Now it's even more important to note that the speed in the movie, which is the closest we can get to a legitimate time frame, may not even be accurate because this is anime and time in film in general is not always 1:1. But with what we can for sure determine, I don't see any problems with this.

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u/waitletmepoopfirst Dec 14 '16 edited Dec 14 '16

Fuck, I was planning on making a rant showing this feat...

Welp, sorry bout that

Do you have a shot of where they both start off? Because if they met in the middle that means Naruto can run at least at the same speed as it expands, which is hella impressive.

Realistically the blade looks about a quarter of the moon's diameter longer than the moon to me, which would boost the blade *expansion speed to Mach 1825, I'll update the OP

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u/KerdicZ Kerd Dec 14 '16

The best we have is the attack being fired from this angle - Naruto proceeds to run those dozen meters before the attack closes the distance shown in this image.

A quarter seems too much (but possible since we don't see the end of the beam on-screen), a fifth seems more reasonable to me.

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u/waitletmepoopfirst Dec 14 '16

Actually to be honest that kinda looks like that film technique where you go back a tiny bit in time to show what the other party was doing. Like, a shot of the beam flying at Naruto, and then a shot of Naruto running at the beam, before a shot of them colliding. I can't really tell where they meet, but at the very least Naruto has comparable running speed to the beam imo

A quarter seems too much (but possible since we don't see the end of the beam on-screen), a fifth seems more reasonable to me.

I can see that, which makes the expansion speed Mach 1752 rather than Mach 1825

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u/KerdicZ Kerd Dec 14 '16

Like, a shot of the beam flying at Naruto, and then a shot of Naruto running at the beam, before a shot of them colliding.

Not quite, the shot of the beam flying to Naruto has Naruto with his full chakra cloak on, while the next shot we see him putting the chakra in his arm.

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u/waitletmepoopfirst Dec 14 '16

Oh yeah I see what you mean.

I'm not sure how we should actually interpret that though. We have a frame of the beam flying toward Naruto but then it cuts to a new frame of just Naruto running forward, from a closer perspective than the shot with the beam in it. In the meantime we don't get an image of how far the beam has gone.

Naruto does get about twice as big between frame cuts though, which would support them meeting in the middle of the distance between those frame cuts. So based on that I think it's plausible Naruto is running at the same speed as the beam.