Aeroplane: the whole path
19 inventions to master first, in an order where each one only needs those before it.
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- 8Materials & ChemistryIII
Iron Smelting
Wider adoption around 1200 BCE; ore, charcoal and a bloomery
c. 1,200 BCEneeds 4, 7
- 9
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- 11
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- 13
- 14
- 15
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- 17
- 18Energy & Prime MoversV
Internal Combustion Engine
Small explosions, steady power
1876needs 8, 9, 13, 14
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