VYSE


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vis, vice, vise

A spiral staircase generally of stone, whose steps wind around a central shaft or newel; a screw stair.

VYSE

The speed for the best engine-out rate of climb. It should be marked on the ASI (air-speed indicator) as a blue radial line; it is often referred to as the blue-line speed. Also known as YYSL. See blue-line speed.
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