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Material Hardness Hit Points Fire Check Weight (kg)
Paper (.0001 m thick) 0

0

5 0.1
Leather 4 10 7 90
Wood 5 12 7 75
Iron 10 25 20 790
Coal 3 15 5 80
Copper 8 15 20 900
Silver 10 18 20 1000
Gold 5 10 20 1900
Venusian Chitin 5 15 12 50
Martian Dragonhide 12 20

20

500
Obsidian 10 30 25 260
Glass 2 3 18 200
Flesh 0 5 7

100

Stone Masonry 10 25 20 220
Unworked Stone 15 30 20 260

The hardness, hit points, and weight is for 1x1x.1 meters of the specified material.

Lift Gas kg/m3 Fire Check
Hydrogen 1.1 4
Helium .95 20
Aether 2.5 20
Coronium .85 5
Nebulium 2.2 16
Acmium 2.45 18
Hydrium 2.3 12
Solarium 1.5 8
Stellarium 1.6 12

Use this table for finding how large the gasbag should be for airships. For example, a wood box having a volume of one cubic meter with the same density as in Table I would need 147 cubic meters of aether to lift it. A paper box would need about a fourth of a cubic meter to lift it. However, if the box were made of gold, it would need more than 3700 cubic meters of aether to lift it!