Aircraft Systems Flashcards
What should a pilot do if he suspects carburetor icing?
A pilot suspecting carburetor icing should apply carburetor heat. This will initially degrade the engine operation as it melts the
ice. However, the engine operation will gradually return to smooth operation, although at a slightly lower RPM than normal.
What are the effects of pressure change on aircraft altitude?
The effects of pressure changes on an aircraft’s altitude.
- Flying from a high pressure area to a low pressure area without adjusting the altimeter while maintaining a constant
indicated altitude would result in a loss of true altitude - Flying from a low pressure area to a high pressure area without adjusting the altimeter while maintaining a constant
indicated altitude would result in a gain of true altitude
What would you do if you are flying in a(n) Cessna 172N and you encounter icing conditions?
If you encounter icing, first, see if your aircraft has a checklist for inadvertent into icing conditions. If it does, follow that.
Otherwise, here are some generic steps that can be taken:
Turn on the Pitot heat and (if applicable) carb heat.
Make a 180 turn. Go back to where there wasn’t any icing.
Try to descend below it if you can get below and still be at a safe altitude. If that’s not possible, go above the icing if possible
(though this will often not be).
Try to get to a warmer air area.
* If none of these are working, land at the nearest airport, with increased airspeed to counter the drag effects of the ice.
Always talk to controllers-they may have suggestions regarding the icing conditions and altitudes.
What is an ammeter?
An ammeter is an instrument that measures the electrical current flowing in a wire. In an airplane, an ammeter is normally placed in the
circuit connection between the battery and the alternator/generator.
What is VA (Maximum,Gross Weight) for the Cessna 172N?
97
Of the five types of altitude that a pilot needs to be concerned with, which altitude is the most important for the computation and
prediction of aircraft performance?
Density altitude is pressure altitude corrected for non-standard temperature. In effect, this is the altitude that the airplane thinks it is at.
What are the three principal components (“foundational elements”) of the GPS system?
Space: The space element consists of over 30 Navstar satellites. This group of satellites is called a constellation. The space element consists of 24
Navigation System using Timing and Ranging (NAVSTAR) satellites in 6 orbital planes.
Control: The control element consists of a network of ground-based CPS monitoring and control stations that ensure the accuracy of satellite
positions and their clocks. In its present form, it has five monitoring stations, three ground antennas, and a master control station.
User: The user element consists of antennas and receiver/processors on board the aircraft that provide positioning, velocity, and precise timing to
the user.
What is the best glide speed (VGLIDE) for the Cessna 172N?
69 MPH
What is VNO (Maximum Structural Cruising Speed) for the Cessna 172N?
147 MPH
If you have to ditch the airplane (in water), generally speaking, in what direction should you land?
Land into the wind
What environmental conditions make carburetor icing probable?
Air temperatures between 20 and 70 degrees F and high humidity make carburetor icing probable.
What is the minimum oil capacity for the Cessna 172N?
6 Quarts
What is VFE for the Cessna 172N?
98 MPH
Describe the stall warning system on the Cessna 172N.
The pneumatic stall warning system works by detecting low pressure on the wing as a plane nears a stall. This low pressure pulls air through a horn located near the windshield, creating a sound warning the pilot about 5-10 knots before a stall happens. The system’s key parts are an inlet on the wing, the horn, and the connecting plumbing.
Why should the Avionics Master / Power Switch be OFF during engine start?
To prevent damage to the avionics from a voltage surge during engine start.
What is Vx for the Cessna 172N?
74 MPH
What is VNE for the Cessna 172N?
184 MPH
When an aircraft is flying where it is colder than standard temperature, will the altimeter indicate
higher or lower than true altitude?
If the temperature it COLDER than standard, the altimeter will indicate higher than true altitude
(the aircraft will be LOWER than the reading on the altimeter indicates). Remember the phrase:
“Hot to cold, look out below!”
What is VY for the Cessna 172N?
90 MPH
What are the most dangerous aspects of structural icing?
Ice can alter the shape of an airfoil, which can cause control problems, change the angle of
attack at which the aircraft stalls, and cause the aircraft to stall at a significantly higher
airs eed. Ice can reduce the amount of lift an airfoil will roduce and reatl increase drag
What is VSO for the Cessna 172N?
(Stall speed in the landing configuration)
47 MPH
