RK Bali, Air Navigation
Vertical Speed Indicator: DGCA Air Navigation questions
A vertical speed indicator measures how fast static pressure changes, not height. Static goes straight into a capsule and into the case through a metered choke, so in a climb or descent the case lags and the difference drives the needle.
Its 20 questions are mostly about faults: a blocked static vent, a partly blocked choke, a leaking case and lag, plus what the instantaneous VSI adds. Exam sessions have tested 4 of these.
Blocked static makes the VSI read zero and stay there, which looks like level flight. The instantaneous VSI's accelerometer pistons cut lag, not blockage errors. On a 3 degree path, descent rate in feet per minute is about five times groundspeed in knots.
0 answered·5 free questions·0 right
Question 1 of 5
IVSI is more useful over normal VSI as its indications are:
Question 2 of 5
During turns the piston is pulled out because of centrifugal force and the capsule contracts. A/C fitted with IVSI will have
Question 3 of 5
Compared to the VSI, what errors are eliminated by the IVSI?
Question 4 of 5
The response time of a vertical speed detector may be increased by adding a:
Question 5 of 5
The vertical speed indicator of an aircraft flying at a true airspeed of 100kt, in a descent with a slope of 3 degrees, indicates:
15 more questions in this chapter
They are free with an account, and so are the worked solutions.
Sign up for free