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.
1
u/robcap Dec 14 '16
There is so much wrong with this...
The time is never 1:1. These guys have incomprehensible super speed and reflexes, and they're fighting. Nothing will be shown at true speed otherwise everything would happen in seconds. And then you have things shown a couple of times over from different camera angles to give greater emphasis.
That's a minor point though. The entire point of coming up with a speed for the attack relies on your assumption that his attack travels a distance like the diameter of the moon in a few seconds, and that is relevant to the combat speed of the people involved? No. Toneri makes a ridiculously enormous blade and he swings his arm through almost 180* while floating above the moon. The end of the blade will be moving incredibly fast because of how long the thing is, but what does the fact that Toneri swung his arm through an arc, in what was displayed as 7 seconds, matter to anything?