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Originally Posted by Wombat
Fantastic shot.
Why does the red tail light miss about 5 flashes at the top of the steep bit?
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The beacon is the light that means the plane has an engine running. As it climbs you see the beacon on top and as it levels off you begin to see the beacon on the bottom. Planes have at least two of everything. Some systems, like navigation have six or seven layers of redundancy.