Mach Cone Qualifications

[Lilybitdun]

Both laser and lightning bolts have info on their pages on what qualifies and disqualifies them being their respective speed, but what about if shockwaves are meant to be sonic booms or not?
I recently made a calc assuming a shockwave was a mach cone and was told I need more proof of it being one, what exactly qualifies and disqualifies a shockwave as being a mach cone?

 

[NIK_FARIS]

You would need narrative statement saying that the attack/technique or the person move at speed of sound or surpass speed of sound. Exp like Piercing Blood Technique from JJK

 

[Lilybitdun]

You would need narrative statement saying that the attack/technique or the person move at speed of sound or surpass speed of sound. Exp like Piercing Blood Technique from JJK

I don't think that's the only thing since the Beast Titan has accepted supersonic throwing speed without a direct statement (from my knowledge)

 

[KLOL506]

Aside from obviously requiring a statement of it being supersonic/exceeding the speed of sound, it'd need to portray other visible properties of a mach cone so as to differentiate it from a shockwave, like crackling, vapour waves forming around the object and so on and so forth.

Mach wave - Wikipedia

en.wikipedia.org

@DontTalkDT @Migue79 @Executor_N0

 

[Kachon123]

What KLOL said pretty much.

I do think it would help to have an official qualification like we do for other things though.

 

[DontTalkDT]

What's the purpose of deciding that?

 

[Lilybitdun]

Aside from obviously requiring a statement of it being supersonic/exceeding the speed of sound, it'd need to portray other visible properties of a mach cone so as to differentiate it from a shockwave, like crackling, vapour waves forming around the object and so on and so forth.

So something like this which has a wave forming around the object (attack titan's fist/arm) and making a booming noise with the sound design doesn't qualify due to not having a direct statement?

 

[Kachon123]

What's the purpose of deciding that?

It's possible to find the speed of an object from the angle of its mach cone, so for anyone using this method, deciding what is and what isn't a genuine mach cone would help.

 

[KLOL506]

So something like this which has a wave forming around the object (attack titan's fist/arm) and making a booming noise with the sound design doesn't qualify due to not having a direct statement?

Prolly not without the crackling effects and formation of water vapour around the speeding object.

 

[Lilybitdun]

Prolly not without the crackling effects and formation of water vapour around the speeding object.

could you elaborate what you mean by formation of water vapor? I thought that's what shockwaves are?

 

[KLOL506]

could you elaborate what you mean by formation of water vapor? I thought that's what shockwaves are?

It'd be akin to something like this, though IDK what the shape around large-sized fists would be

 

[Lilybitdun]

I'm not sure I understand what's the visual difference between these vapor cones and the example I had posted

Like they're both forming in the same shape of the point of origin being the largest part of the object (bottom of jet plane to wing height and eren's fist)
I understand not every shockwave is a mach cone but is a direct statement the only way even if it shows properties of a mach cone?

 

[KLOL506]

I understand not every shockwave is a mach cone but is a direct statement the only way even if it shows properties of a mach cone?

Sadly, yeah.

 

[Lilybitdun]

Sadly, yeah.

Seems a lil odd, when was that rule made or is it an unwritten one?

 

[DontTalkDT]

It's possible to find the speed of an object from the angle of its mach cone, so for anyone using this method, deciding what is and what isn't a genuine mach cone would help.

Ah, yes, using randomly chosen design elements that don't even approximately correlated to the intended speed to determine a stat is my favourite.
I guess we shoudl at least make sure it's actually a Mach cone then.

 

[Lilybitdun]

Seems a lil odd, when was that rule made or is it an unwritten one?

hoping to get an answer to this

 

[Epyriel]

Ah, yes, using randomly chosen design elements that don't even approximately correlated to the intended speed to determine a stat is my favourite.

Fictional series don’t always treat this arbitrarily.

For example the Stille from Frieren (an explicitly supersonic bird) shows its Mach cone narrowing as the bird speeds up as you would expect:

 

[Hypertornado099]

Ah, yes, using randomly chosen design elements that don't even approximately correlated to the intended speed to determine a stat is my favourite

There definitely are series out there with realistic mach cones, though its probably not many

 

[Greatsage13th]

Fictional series don’t always treat this arbitrarily.

For example the Stille from Frieren (an explicitly supersonic bird) shows its Mach cone narrowing as the bird speeds up as you would expect:

That does look like a Mach cone.