# Viewing blog entries in category: Mortal Engines & Larklight

• ### Mortal Engines - Panama gets destroyed

After the 60 Minute War, multiple Slow Bombs hit the Earth, one of which destroys Panama, seperating North and South America. A quick search reveals that Panama has a surface area of 75,517 km^2, or 75517000000m^2. It also has an average elevation of 360m.

V = Ah
= 75517000000 X 360
= 2.718612e13m^3

For a low end we'll go with violent fragmentation (69000000 joules/m^3) and for a high end pulverization (200000000 joules/m^3).

(Low end)

E = 2.718612e13 X 69000000
= 1.8758422800000001e+21 joules
= 448.33706500956026275 gigatons

(High end)
E = 2.718612e13 X 200000000
= 5.437224e21 joules
= 1.2995277246653920145 teratons

Final Results
Slow Bomb destroys Panama (low end) = 448.337 gigatons
Slow Bomb destroys Panama (high end) = 1.29 teratons
• ### Mothstorm - Thunderhead attacks moths

The storms themselves reach into space and drag the moths and Snilth ships down, including Thunderhead. Below is the text from the book, which also shows illustrations of the distance from Jupiter and the clouds doing this.
Spoiler:

Jupiter in the Larklight universe is 3218688000m in diameter and weighs 2.31529493e31kg according to my previous calculations. That means it has a gravity acceleration of 149.15055558962194m/s^2 according to this calculator. We can scale from the illustrations.
Spoiler:

R = (h/2) + c^2/(8h)
= (44/2) + 690^2/(8 X 44)
= 1374.55682

D = 1374.55682 X 2
= 2749.11364

2749.11364 pixels = 3218688000m
1 pixel = 3218688000m/2749.11364 = 1170809.37m

The top part of each as an ellipsoid, the rest as cylinders

1356297.25m X 196 = 265834261m
265834261m/2 = 132917130m
1356297.25m X 98 = 132917130m
132917130m/2 = 66458565m
1356297.25m X 270 = 366200258m
1356297.25m X 200 = 271259450m
366200258m + 271259450m = 637459708m
1356297.25m X 45 = 61033376.2m
61033376.2m/2 = 30516688.1m
366200258m + 271259450m + 265834261m = 903293969m

V = 4/3πabc
= 4/3 X π X 132917130 X 66458565 X 66458565
= 2.45907335e24m^3

On the atmosphere of Jupiter;
https://en.wikipedia.org/wiki/Atmosphere_of_Jupiter
Hydrogen weighs 0.0899kg per m^3.

M = 2.45907335e24 X 0.0899
= 2.21070694e23kg

V = πr^2h
= π X 61033376.2^2 X 637459708
= 7.4599755e24m^3

M = 7.4599755e24 X 0.0899
= 6.70651797e23kg

M = 2.21070694e23kg + 6.70651797e23kg
= 8.91722491e23kg

E = 8.91722491e23 X 149.15055558962194 X 903293969
= 1.20138915e35 joules
= 28.7138898184 yottatons

Now onto the other storms.
1356297.25m X 238 = 322798746m
322798746m/2 = 161399373m
1356297.25m X 141 = 191237912m
191237912m/2 = 95618956m
1356297.25m X 229 = 310592070m
1356297.25m X 124 = 168180859m
310592070m + 111216374m = 421808444m
1356297.25m X 82 = 111216374m
111216374m/2 = 55608187m
322798746m + 310592070m + 111216374m = 744607190m

V = 4/3πabc
= 4/3 X π X 161399373 X 95618956 X 95618956
= 6.18128044e24m^3

M = 6.18128044e24 X 0.0899
= 5.55697112e23kg

V = πr^2h
= π X 55608187^2 X 421808444
= 4.09772316e24m^3

M = 4.09772316e24 X 0.0899
= 3.68385312e23kg

M = 5.55697112e23kg + 3.68385312e23kg
= 9.24082424e23kg

E = 9.24082424e23 X 149.15055558962194 X 744607190
= 1.02627278e35 joules
= 24.5285081262 yottatons

Now for the final storm on the left.
1356297.25m X 149 = 202088290m
202088290m/2 = 101044145m
1356297.25m X 114 = 154617886m
154617886m/2 = 77308943m
1356297.25m X 96 = 130204536m
130204536m/2 = 65102268m
1356297.25m X 205 = 278040936m
1356297.25m X 131 = 177674940m
278040936m + 177674940m = 455715876m
1356297.25m X 133 = 180387534m
278040936m + 177674940m + 180387534m = 636103410m

V = 4/3πabc
= 4/3 X π X 101044145 X 77308943 X 77308943
= 2.52964299e24m^3

M = 2.52964299e24 X 0.0899
= 2.27414905e23kg

V = πr^2h
= π X 65102268^2 X 455715876
= 6.06787001e24m^3

M = 6.06787001e24 X 0.0899
= 5.45501514e23kg

M = 2.27414905e23kg + 5.45501514e23kg
= 7.72916419e23kg

E = 7.72916419e23 X 149.15055558962194 X 636103410
= 7.33305821e34 joules
= 17.5264297562 yottatons

So each storm (or arm of Thunderhead) is large planet level+. Damn! How much energy is all of that together?

E = 28.7138898184 yottatons + 24.5285081262 yottatons + 17.5264297562 yottatons
= 70.7688277 yottatons

Final Results
Storms attack Snilth fleet = >70.769 yottatons

And that's not even taking kinetic energy into account! Also for reference, this is part of the Larklight trilogy.
• ### Scrivener's Moon - The hardest calc I've ever made

50 megatons. Absolutely painstaking. Final Results
The Scrivener Institute's durability = 50 megatons
• ### A Web of Air - Mayda's craters creation

The crater that Mayda sits in was formed by a super weapon from the 60 Minute War. A further description of the crater and it's size.
The first edition covers have a visual representation of how big the crater is.

Do we have scaling from the books to help say how tall? Thankfully, yes.
Several hundred feat above the harbour. That can be a bit vague though. Thankfully, we have more information.
The resteraunt is 100 yards away, or 91.44m. This building is located halfway up the crater.
So scaling half the height of the crater, we can just half it then times that by 2 for our height.

124/2 = 62 pixels
62 pixels = 91.44m
1 pixel = 91.44m/62 = 1.47483871m
1.47483871m X 124 = 182.88m
1.47483871m X 233 = 343.637419m
343.637419m/2 = 171.81871m
1.47483871m X 55 = 81.116129m
81.116129m/2 = 40.5580645m

The first quote says conical, while the next says bowl-like. I'll calc it as a conical frustrum.

V = (1/3)π(r^2+rR+R^2)h
= (1/3) X π X (40.5580645^2 + 40.5580645 X 171.81871 + 171.81871^2) X 182.88
= 7303340.4m^3

The craters hollow, so it would have needed to eject all the stone from inside it. So violent fragmentation it is.

E = 7303340.4 X 69000000
= 5.03930488e14 joules
= 120.442277247 kilotons

And that's not taking into account the underwater parts, so ultimately it would be even higher.

Final Results

Mayda's crater formation = >120.442 kilotons
• ### Mortal Engines - There's always be an England...

Mortal Engines is a world where cities wander around and eat each other for reference. First up is an easy one; Salthooks speed.
80m/h is equal to 128.7km/h, or 35.75m/s. And London is even faster than this. Now onto it's energy.
The speed is 80 miles an hour (35.7632m/s), and has a height of 2000 feet (609.6m). Now onto Londons engine power and the kinetic energy generated.
London has a height of 2000 feet (609.6m), and keep in mind that traction citites are generally wider than they are tall. The longest ship in the world to date is the Seawise Giant, which is 458.46m long (so London is taller and wider than the biggest ship in the world, and likely weighs a lot more too). It's a good place to start though. The Seawise Giant weighs 657,019 tons, or 657,019,000kg. Putting that through the kinetic energy calculator gets a result of 420165777349.3452 joules, or 100.42203091523546732 tons of TNT. For reference, put into a bomb that's enough energy to level multiple city blocks. Or a lot. And as said above, I feel the final result would ultimately be even higher than this. And then there are the tracks it created in the ground, which confirm this level of power.
Final Results
Salthook flees London = 35.75m/s
London's kinetic energy = 100.422 tons of TNT
• ### Starcross - End of the great starfish era

Larklight's gravity engine explosion creates a crater 1000 miles (1609.344km) wide and at least as deep as Starcross is. We don't have many references to how big Starcross is that I can recall, but it's well over 100 yards (91.44m) wide.
Volume of the crater as a spherical cap.

V = (π X 91.44^2/3) X (3 X 1609344 - 91.44)
= 4.227299e10m^3

The average weight of Mars per m^3 is 3933kg
.

M = 4.227299e10 X 3933
= 1.6625967e14kg

Escape velocity of Mars is 5.03km/s, or 5030m/s.

E = (0.5) X 1.6625967e14 X 5030^2
= 2.10325964e21 joules
= 502.691118547 gigatons

Final Results
Larklight's gravity engines explode = >502.691 gigatons

Starcross is alot bigger than that, so this is very much a low end.
• ### Starcross - Train travels to Starcross

It only takes a few hours for the trains to travel 10,000 miles (16093.44km). Low end of 10 hours, mid end of 6 hours and high end of 3 hours.

(Low end)
T = 16093.44km/10h
= 447.04/340.29
= Mach 1.31370302

(Mid end)
T = 16093.44km/6h
= 745.066667/340.29
= Mach 2.18950503

(High end)
T = 16093.44km/3h
= 1490.13333/340.29
= Mach 4.37901005

Final Results

Train travels to Starcross (low end) = Mach 1.314
Train travels to Starcross (mid end) = Mach 2.19
Train travels to Starcross (high end) = Mach 4.379
• ### Larklight - The Ancient Storm

We've had a lot of Jupiter calcs recently, haven't we?
Thunderhead is the Great Red Spot on Jupiter.
https://www.sciencedaily.com/terms/great_red_spot.htm

The Great Red Spot is between 24,000km to 40,000km wide and between 12,000 to 14,000km high. On average, that's 32000km wide and 13000km high. How deep is it?
https://www.space.com/39066-jupiter-great-red-spot-depth-juno-spacecraft.html
200 miles is really 321.8688km, so we'll go with that. With all our values, we can get the volume of the Great Red Spot as an ellipsoid.

V = 4/3πabc
= 4/3 X π X 16000 X 6500 X 160.9344
= 7.01085256e10km^3
= 7.01085256e+19m^3

Density of a cloud is 1.003kg/m^3.However, on Jupiter everything weighs 2.4 times more.

M = 7.01085256e+19 X 1.003
= 7.03188512e19 X 2.4
= 1.68765243e20kg

The energy to condense clouds is 2,500,000 joules per kg.

E = 1.68765243e20 X 2,500,000
= 4.21913107e26 joules

That's not all; we can also find the energy of the storms rotations.
https://www.nasa.gov/centers/goddard/news/topstory/2008/jupiter_lrs.html
That's equivalent to 171.66336m/s.

E = (0.5) X 1.68765243e20 X 171.66336^2
= 2.48661318e24 joules

Now our total energy!

E = 4.21913107e26 + 2.48661318e24
= 101.433967495 petatons

Final Results
Thunderheads general power = 101.439 petatons

I feel this isn't quite right, so help on this would be appreciated.
• ### Larklight - The Uncrushable flies to Jupiter

The Uncrushable flies from Io to Jupiter in a few hours. The distance from Io to Jupiter is 628,300,000km. We'll go with a high end of 3 hours, a low end of 10 hours and a mid end of 6 hours..

(Low end)
T = 628,300,000km/10h
= 29087963/340.29
= Mach 51287.9538

(Mid end)
T = 628,300,000km/6h
= 29087963/340.29
= Mach 85479.923

(High end)
T = 628,300,000km/3h
= 58175925.9/340.29
= Mach 170959.846

Final Results
The Uncrushable flies to Jupiter (low end) = Mach 51287.954
The Uncrushable flies to Jupiter (mid end) = Mach 85479.923
The Uncrushable flies to Jupiter (high end) = Mach 170959.846
• ### Larklight - Thunderhead a-go!

Jupiter is mostly hydrogen, so they'd likely weigh as much as hydrogen. Radius of the Moon is 1737km.

V = 4/3πr^3
= 4/3 X π X 1737^3
= 2.19527062e10km^3
= 2.19527062e+19m^3

Hydrogen weighs 0.0899^2kg per m^3.

M = 2.19527062e+19 X 0.0899^2
= 1.77421991e17kg

The heat of combustion of hydrogen is 144000 kilojoules/kg.

E = 1.77421991e17 X 144000
= 2.55487667e22 kilojoules
= 6.10630179254 petatons

Final Results

Thunderhead creates moon-sized fires = 6.106 petatons
• ### Larklight - Larklight flies to Earth

Larklight flies 30,000 miles (48280.32km) in the span of a few seconds. We'll have a low end of 10 seconds, and a high end of 3 seconds.

(Low end)
T = 48280.32km/10s
= 4828032/340.29
= Mach 14187.9926

(High end)
T = 48280.32km/3s
= 16093440/340.29
= Mach 47293.3086

Final Results
Larklight flies to Earth (low end) = Mach 14187.993
Larklight flies to Earth (high end) = Mach 47293.309

And the power of it's gravity engines risked tearing the Moon apart just by flying by.
• ### Larklight - Lantern of Creations Dawn

Larklight (or the Lantern of Creations Dawn, as it was originally known), shaped all the planets of solar system into what they are. An easy way to do this would be to add up the gravitational binding energy of all the planets of the solar system, which would get large planet level+. But the thing is, this is a fantasy version of the solar system, and Jupiter is stated to be even bigger.
Jupiter is a million miles in radius (1609344km, or 1609344000m), which would make it 3218688000m (or 3218688km) in diameter. Jupiter weighs 1.898 × 10^27kg and is 139,822km (139822000m) in diameter. We'll use square law to determine it's new mass.

M2 = (H2/H1)^3*M1
= (3218688000/139822000)^3 X 1.89800e27
= 2.31529493e31kg

This is the formula for finding the GBE of a planet;

U = GBE
G = gravitational constant
M = mass

The gravitational constant is 6.67408e-11m^3/kg per s.

U = (3) X (6.67408e-11) X (2.31529493e31^2)/(5 X 1,609,344,000)
= 1.33384822e43 joules
= 3.18797375717 tenakilotons

Final Results
Lantern of Creations Dawn shapes the solar system = >3.188 tenakilotons
• ### Mortal Engines movie confirmed!

The hype is so damn real right now!
http://www.philip-reeve.com/the-mortal-engines-movie/
• ### Mortal Engines - Shrike is hit by a town

No not that Shrike, the one from Mortal Engines. During a chase early in the series, Shrike is ran over by a small traction town.

A few moments later a second, bigger town runs over him again.

So how fast do Traction Towns move?

And as the town is fleeing from being eaten by a nasty prate suburb, it can be assumed that they are going as fast as they can.

Here's a picture of Turnbridge Wheels from the Traction Codex.

At an estimate, the town that ran over Mr Shrike is about the size of a super yacht, Turnbridge Wheels itself would be even bigger going by that above image.

http://yachtpals.com/largest-yachts-9067
http://www.1728.org/energy.htm

Low end

Weight = 13,000 tons

Speed = 80 miles

Energy = 1.987 tons of TNT

Mid end...

Weight = 15,850 tons

Speed = 80 miles

Energy = 2.4226 tons of TNT

High end...

Weight = 20,000 tons

Speed = 80 miles

Energy = 3.0569 tons of TNT

He then gets up like none of that shit even happeneed and keeps going about his business. 