Vertical Speed Indicator Flashcards
The _____ is an instrument that indicates the rate of change of altitude
Uses STATIC pressure and indicated both climb and descent (fpm or ft/min)
senses pressure from static port
VSI vertical Speed indicator
The ______ inside of the VSI expands or contracts during changes in static pressure.
Diaphragm
A _____ linkage TRANSLATES the expansion and contraction of the diaphragm into needle movement.
Mechanical
The _______ compares the incoming static pressure to another older version still present within the system.
special air metering unit (SAMU)
The _______ functions as a CALIBRATED LEAK ASSEMBLY designed to RESTRICT (slow down) the flow of air pressure INTO or OUT of the instrument case.
(SAMU) special air metering unit
________ receives INCREASED pressure during a descent.
Case still holds the older and lesser pressure.
Capsule
Capsule receives INCREASED pressure during a descent.
______ still holds the older and lesser pressure.
Case
Capsule receives decrease pressure during ______.
Climb
Case still holds the older and higher pressure during ______.
Climb
The VSI relies solely on _______ changes to indicate vertical speed of the aircraft
This can result in lags between the start of the actual climb/descent of the aircraft and the indication shown on the VSI
static pressure
What is developed to reduce the lag?
Instantaneous Vertical Speed Indicator (IVSI)
IVSI has and additional unit called ________ which is designed to CREATE a more RAPID DIFFERENTIAL PRESSURE effect at the initiation of a climb or descent
accelerometer unit
Accelerometer response decays after a few seconds, By this time the change in actual static pressure becomes _______.
Effective
If diaphragm expands, you are _______.
descending
If diaphragm shrinks, you are _______.
climbing
