Gleim: Airplane Instruments, Engines and Systems Flashcards
When can magnetic compasses be considered accurate during flight?
Only during straight and level flight at constant speed.
What is Deviation?
Deviation is the difference between direction indicated by a magnetic compass not installed in an airplane and one installed in an airplane.
What is ANDS?
Accelerate North Decelerate South. In the Northern Hemisphere acceleration/deceleration error occurs when on an east or west heading.
a. A magnetic compass will indicate a turn towards the north during acceleration when on an east or west heading.
b. A magnetic compass will indicate a turn towards south during deceleration when on an east or west heading.
c. Acceleration /Deceleration error does not occur when on a north or south heading.
When do compass turning errors occur?
In the Northern hemisphere compass turning errors occur when turning from a north or south heading.
a.
A magnetic compass will lag when?
A magnetic compass will lag and at the start of a turn indicate a turn in the opposite direction when turning from a north heading.
1. If turning to the east (right)the compass will initially indicate a turn to the west and then lag behind the actual heading until your airplane is headed east at which point there is no error.
2. If turning to the west (left) the compass will initially indicate a turn to the east and then lag behind the actual heading until your airplane is headed west at which point there is no error.
When will a magnetic compass lead?
A magnetic compass lead or precede the turn when turning from a south heading
Do turning errors occur from an east or west heading ?
NO, compass turning errors do not occur from an east or west heading . These errors diminish as the acceleration/deceleration or turns are completed.
Deviation unlike variation changes with heading rather than with geographic location
Deviation unlike variation changes with heading rather than with geographic location
Deviation unlike variation changes with heading rather than with geographic location
Deviation unlike variation changes with heading rather than with geographic location
Pitot Static System in a source of pressure for :
Altimeter
Vertical Speed indicator
Airspeed Indicator
Pitot tube provides impact (or ram) pressure for?
Airspeed indicator only
What are some reasons engine oil and cyclinder head temperatures can exceed their normal operating range?
a. Operating with too much power
b. Climbing too steeply (i.e. @ low airspeed) in hot weather
c. Using fuel that has a lower-than-specified octane rating
d. Operating with too lean a mixture
e. The oil level being too low
Excessively high engine temperatures by reversing any of the above.
What are the advantages of a constant speed propeller?
the advantages of a constant speed propeller (aka controllable-pitch) is that it permits the pilot to select the blade angle for the most efficient performance.
What type of controls do constant speed propellers have?
Constant speed propellers have both Throttle and Propeller controls.
- Throttle controls power output, which is registered on the manifold pressure gauge.
- Propeller control regulates engine revolutions per minute(RPM) which are registered on the tachometer.
To avoid overstressing cylinders, excessively high manifold pressure should not be used with low RPM setting.
What is the purpose of the dual ignition system?
One purpose of the dual ignition system is to provide for improved engine performance and the other is safety.
