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Can Toothless Fly?
Topic Started: 31 May 2014, 15:23 (1686 Views)
Zer0x
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[b]Banhammerdragon
[/b]

More than one year ago TheCube42 posted on Tumbr a mathematically and physically proven article about the aerodynamics of Toothless while gliding. I discovered the post few days ago and found some discrepancies in his calculations.

I created this topic to talk about the the physics of Toothless and try to continue his work.

Here is the link to the original post:

http://thecube42.tumblr.com/post/557263 ... rodynamics

And here our little discussion:
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UNAMUSED

No, I'm serious....stop it..
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Hope_and_Heir
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[color=#B40431]Winner of Shnuckle's Oneshot Fanfiction Contest 2014
[/color]

My. Head. It's. Spinning. Your intellect is too much for my brain to handle.
'There Were Dragons When I Was A Boy…'



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HideousZippleback
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[color=blue]I'm just here for Snotlout.
[/color]

GAH... I don't understand any of it... My bran ain't made for this...
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BerserkDragon
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antisocial british nerd with a youtube channel

I understand the gist of it, seen as I'm designing a glider, but I wouldn't of been able to do this myself :D
Me? An otaku? Pfff.

Yes I do like dragons if you're wondering. Doesn't seem like it from my profile pic n signature, I know, but I do.

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chimuelo
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Blacksmith Apprentice

Note to self: revisit this topic after I've taken fluid dynamics. :D

I just finished a basic dynamics class so I could understand most the set-up, but there's no way I could have pointed out all of Zer0x's criticism by myself!
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Zer0x
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[b]Banhammerdragon
[/b]

In the next days I will make a detailed sketch with all affecting forces.


I mentioned before that we have to know how fast Toothless can go. For that I use the maximum speed he could reach after a dive.

Here is the formula for the max. speed:

v=sqrt((2xmxg)/(pxAxc))


And here is the formula for the speed at any time while falling:



Don't ask me where it comes from. It needs more than 3 sheets of paper, 3 substitutions, separation of variables and a heavy integral.


m - mass (I used 130kg for it, if his is higher he will be faster)
g - acceleration (9.81 m/s^2)
p - density of the medium (air at level 0: 1.2041 kg/m^3)
A - area of the falling axis (according from the size of a 3D model it is around 0.8 m^2)
c - drag coefficient (without his wings he have a nearly ideal streamline shape (0.02), I used 0.06, that's a bit lower than an airplane)
v0 - speed at the start (mostly 0)
t - time
UNAMUSED

No, I'm serious....stop it..
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Toothless123
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Night Fury

Zer0x
01 Jun 2014, 18:58
In the next days I will make a detailed sketch with all affecting forces.


I mentioned before that we have to know how fast Toothless can go. For that I use the maximum speed he could reach after a dive.

Here is the formula for the max. speed:

v=sqrt((2xmxg)/(pxAxc))


And here is the formula for the speed at any time while falling:



Don't ask me where it come from. It needs more than 3 sheets of paper, 3 substitutions, separation of variables and a heavy integral.


m - mass (I used 130kg for it, if his is higher he will be faster)
g - acceleration (9.81 m/s^2)
p - density of the medium (air at level 0: 1.2041 kg/m^3)
A - area of the falling axis (according from the size of a 3D model it is around 0.8 m^2)
c - drag coefficient (without his wings he have a nearly ideal streamline shape (0.02), I used 0.06, that's a bit lower than an airplane)
v0 - speed at the start (mostly 0)
t - time
:huh: :huh: :huh: :huh: :huh: :P
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WasBornCrazy
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i dont think my avatar is working but ehh

o.O

Intellect.

O.o
i'm not very active anymore!! it's sad, but i'll come back sometimes to feel nostalgic ahaha
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Lageos
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Gronckle

You said that the dragon's bones are hollow, I would beg to differ, the amount of abuse that dragons are able to take, is underrepresented, it most likely would be sold, seeing how much abuse toothless took in the first movie, plunging from the sky, twice, hitting sea-stacks, not to mention, they need to support their own weight! anyways, they are extremely durable creatures, so my guess is that they have solid bones.
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Dan_Oceans
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What do I put here again?

okay so solid bones=more weight. That makes thing more difficult for dragons in terms of flying right?The force needed to propel Toothless increases and makes it hard for Toothless to stay in the air. But how much do the bones weigh? Is there a limit to the weight Toothless can have before he can fly?
"can you hear the birds sing? saying go the f*** to sleep (to the sound of les mis)"
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