Variometer

（重定向自Vertical Speed Indicator）

The vertical speed indicator from a Robinson R22. This is the most common type used in aircraft, showing speed in feet per minute

A variometer for paragliders, hang gliders, and ballooneers, showing vertical speed with both a ribbon indicator and a numeric readout

Schematic drawing of the internals of a classic aircraft vertical speed indicator

A variometer (also known as a rate of climb and descent Indicator (RCDI), rate-of-climb indicator, vertical speed indicator (VSI), or vertical velocity indicator (VVI)) is one of the flight instruments in an aircraft used to inform the pilot of the near instantaneous (rather than averaged) rate of descent or climb. It can be calibrated in feet per minute, knots (1 kn ≈ 100 ft/min) or metres per second (1 m/s ≈ 200 ft/min), depending on country and type of aircraft.

单词	Vertical Speed Indicator
释义	Vertical Speed Indicator 原声例句传说之境 Unfortunately for everybody on board, neither of the pilots had access to a vertical speed indicator, which indicates the rate at which the aircraft is descending. 然而不幸的是，两名飞行员都没有垂直速度指示器，这可以用来显示飞机下降的速度。英语百科 Variometer （重定向自Vertical Speed Indicator） A variometer (also known as a rate of climb and descent Indicator (RCDI), rate-of-climb indicator, vertical speed indicator (VSI), or vertical velocity indicator (VVI)) is one of the flight instruments in an aircraft used to inform the pilot of the near instantaneous (rather than averaged) rate of descent or climb. It can be calibrated in feet per minute, knots (1 kn ≈ 100 ft/min) or metres per second (1 m/s ≈ 200 ft/min), depending on country and type of aircraft.
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