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VS Battles Wiki
VS Battles Wiki

Introduction[]

In My Hero Academia, Fat Gum uses his ability "Spear" to launch Rappa and Tengai into a wall, leaving a large crater. I'll be calculating the energy needed to perform this feat.

Calculation[]

Scan 1

First we need to measure the width of Rappa's arm.

Twice's Head = 177/8 = 22.125 cm

Rappa's Arm = 40.30 cm

Now we have to find the width, depth, and radius of the crater.

Scan 2

Rappa's Arm = 40.30 cm

Crater Width = 31.98 m

Axis 1 = 31.98/2 = 15.99 m

Crater Depth (Axis 2) = 2.45 m

Crater Radius (Axis 3) = 27.14 m

We put these values on this Ellipsoid Calculator and then halve the result to get the volume of a semi-ellipsoid.

Volume = 4453.62/2 = 2226.81 m^3 or 2226810000 cm^3

Violent fragmentation of concrete is 20 j/cm^3.

Energy = 2226810000 x 20 = 44536200000 Joules

Final Tally[]

Fat Gum's Spear Creates a Crater = 10.64 Tons of TNT (Large Building level+)

The attack was previously weakened by Tengai's Barrier, and the crater was created by launching Rappa into the wall instead of the direct hit, so it's likely a City Block level attack. Rappa was able to survive and stand up after this, so his durability should scale as well.