The Yellow Arc

Yellow means caution, and there's a very real reason operations above the airspeed indicator's green arc should be conducted carefully, and only in smooth air.

Look at an airspeed indicator or vertical speed tape, as below, in a piston-powered airplane and you’ll see a yellow range of indicated speeds. This is called the “caution range.” Since typical piston airplanes can’t cruise in this speed range under most circumstances, we often don’t spend a lot of time learning how very different […]
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