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In aviation, 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 rate of descent or climb. [1]
In aeronautics, the rate of climb (RoC) is an aircraft's vertical speed, that is the positive or negative rate of altitude change with respect to time. [1] In most ICAO member countries, even in otherwise metric countries, this is usually expressed in feet per minute (ft/min); elsewhere, it is commonly expressed in metres per second (m/s).
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The cockpit of a Slingsby T-67 Firefly two-seat light airplane.The flight instruments are visible on the left of the instrument panel. Flight instruments are the instruments in the cockpit of an aircraft that provide the pilot with data about the flight situation of that aircraft, such as altitude, airspeed, vertical speed, heading and much more other crucial information in flight.
The machmeter is used to show the ratio of true airspeed in relation to the speed of sound. Most supersonic aircraft are limited as to the maximum Mach number they can fly, which is known as the "Mach limit". The Mach number is displayed on a machmeter as a decimal fraction. [4] A vertical speed indicator
In aviation, vertical navigation (VNAV, usually pronounced vee-nav) is glidepath information provided during an instrument approach, independently of ground-based navigation aids in the context of an approach and a form of vertical guidance in the context of climb/descent. An onboard navigation system displays a constant rate descent path to ...
vertical speed indicator: VSM Vertical separation limit VSO Stall speed in landing configuration VSV variable stator vane In a turbine engine VSWR Voltage–standing wave ratio VTA VFR terminal area chart [1] VTOL vertical take-off and landing [1] V/TRK Vertical track VVI vertical velocity indicator: Same as VSI VX Speed for best angle of climb VY
1. - nozzle position indicator [2] 2. Ookazahtel' Povorota – turn indicator [1] UPS Ookazahtel Polozheniya Stabilizahtora – tailplane incidence indicator [8] US 1. - radio receiver [5] 2. Ookazahtel' skorosti - combined airspeed indicator [2] UUAP Ukazatel Uglov Ataki i Peregruzki – combined AOA and g indicator [3] indicator [4] UUT