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.

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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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