Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 22 — The propeller airplane  /  About year 69
22.14

Radial aero engine ⚠

cylinders set like the spokes of a wheel round one crank and cooled by the air: great power for little weight

MakingYear 69Stands on 308 earlier

AWhat it needs

Needs 308 other products in all, 3 of them directly.

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