Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 22 — The propeller airplane  /  About year 66
22.08

Flight instruments

airspeed indicator, altimeter and gyroscope horizon: the pilot knows speed, height and which way is up inside a cloud

MakingYear 66Stands on 355 earlier

AWhat it needs

Needs 355 other products in all, 5 of them directly.

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