[Fancalc Alert] Toneri's moon slice speed

[u/waitletmepoopfirst]

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.

[u/[deleted] → u/[deleted]]

Hes talking about when toneri expanded the blade at naruto and naruto put all his chakra into his one hand and punched it. That particular reaction he did would be reacting to mach 1460-mach 1752.

[u/[deleted] → u/[deleted]]

You mean the one with an obvious wind up that Naruto had time to see coming before the actual attack was launched?

I actually don't think the attack hit Naruto on the initial expansion anyways. As the beam can be seen up fired up into the air, then a few moments later Naruto's hand makes contact, causing this.

[u/KerdicZ → u/[deleted]]

You are trying too hard.

Naruto sees the attack being charged up and starts running

The beam is launched

Naruto runs several meters

Naruto focuses Kyuubi's chakra on his arm - focusing chakra is not automatic nor simple, Naruto has to think and mold it perfectly (something that it's easy for him by now but still a complex process) - then run a few more meters.

The attack finally hits him.

Even if the attack didn't initially hit him, which is not a very solid claim, Naruto still ran a dozen meters and molded chakra in his arm before a massively hypersonic beam could touch him.

The feat is pretty clear cut, whether you like it or not.