chapter 3 Flashcards
Name the (3) gyroscopic flight instruments.
- The attitude indicator (AI)
- The heading indicator (HI)
- The turn coordinator (or turn-and-slip indicator).
Name the (3) pitot-static flight instruments.
- The airspeed indicator (ASI)
- The altimeter
- The Vertical speed indicator (VSI)
What test should be made on electrical gyro instruments prior to starting an engine?
You should turn on the electrical power and listen for any unusual or irregular mechanical noise.
What does the pretakeoff check of the attitude indicator include?
Checking that the horizon bar erects and becomes stable within 5 minutes
Acceleration and deceleration forces induce what sort of small errors in the attitude indicator?
Pitch errors
Does the attitude indicator provide a direct or an indirect picture of pitch attitude and bank angle?
A direct picture
When an airplane accelerates or decelerates quickly, some altitude indicators will precess. What will be incorrectly indicated?
During accelerations, especially take off, there is a false climb indication; and during decelerations, a false decent indication.
If the position of the miniature airplane requires adjustment during flight, when is this best done?
When flying straight and level at a steady speed.
The greatest errors in an attitude indicator occur following a turn of how many degrees?
The greatest errors in an AI occur following a 180 degree turn.
How would a failure of the power supply to an electrically driven AI be indicated?
It would probably be immediately indicated by red warning flag.
What instrument should you check if the indications of a vacuum- driven AI seem erratic and not consistent with the indications of other flight instruments?
The suction (vacuum) gauge.
Why are the FMAs (Flight mode annunciators) so important?
They indicate what mode the flight director and/ or the autopilot is in, and therefore what guidance is being provided to both units.
What power indicators will an airplane fitted with constant speed propellers have?
A tachometer and a manifold pressure gauge for each engine.
How will the ASI be affected if the pitot tube ices over?
There are 2 different pitot blockages that affect airspeed indications: (1) if only the pitot is blocked the airspeed indication will go to zero; (2) if the pitot inlet and the drain holes are both blocked, the airspeed indication will increase in a climb, and decrease in a decent and have no change in level flight.
How will the ASI be affected if the static line becomes blocked?
A blocked static port causes the airspeed indications to be opposite that of the totally blocked pitot tube. With blocked static ports, airspeed decreases in climb and increases in a descent, and has no change in level flight.
In what specific atmospheric condition will the indicated airspeed on the ASI be numerically equal to the true airspeed?
under standard MSL conditions
How does air density change with altitude?
Air density decreases with altitude
Which is more dense: warm or cold air?
cold air is more dense than hot air
What is the effect on TAS if an airplane flies into a parcel of warmer air?
TAS increases when flying into warmer air
What is the purpose of the amber arc on the ASI?
The amber arc is there as a caution to pilots that in this airspeed range turbulent air could overstress the aircraft. It begins with Vno, Maximum structural cruising speed.
What speed does the red radial line on an ASI indicate?
never exceed speed
What is the indicated airspeed corrected for position error called?
calibrated speed
What does the heading indicator need to be aligned with to read accurately?
the magnetic compass
If an airplane turns to the right, will its heading increase or decrease?
Its heading will increase