Flashcards in PPL - General Knowledge Deck (58):
For a conventional aircraft, where must the centre of pressure be relative to the centre of gravity to be considered stable?
The centre of pressure must be behind the centre of gravity
What happens to the centre of pressure before and after a stall?
It will move forward, then rapidly backward when it actually stalls
Name the four forces acting on an airplane in flight?
Lift, Thrust, Weight, Drag
What happens to airspeed by increasing angle of attack, while maintaining the same RPM?
The airspeed decreases
What is the line that runs from the leading edge, to the trailing edge?
The chord line
What is the angle between the chord line, and the relative wind?
The angle of attack
Relative wind is opposite and equal to the motion of the airplane… true or false?
The wing bends air up or down?
There is a _______ pressure above the wing, and a _____ pressure below.
How smooth is the air over the wings during a stall?
Turbulent and bubbly
What attitude or airspeed is required to stann any airplane?
any attitude or airspeed
What are the five stall warning signs?
If the airplane is experiencing 2G’s, and normally weighs 1,200lb’s, how heavy is it?
The two most common types of drag are?
Parasite and induced
_____ Drag decreases with an increase in airspeed, and _____ drag increases
What is ground effect?
A decrease in drag by unbending air when close to the ground
During a right turn, the ball is to the left in the turn coordinator. Is the plan slipping or skidding?
What are the three biggest left turning tendencies?
What is the engine that lies horizontally, and is the most used engine type in general aviation?
Horizontally opposed engine
What are the four cycles in a four stroke engine, in order?
1. intake stroke
2. compression stroke
3. power stroke
4. exhaust stroke
What will happen to the engine if your alternator fails and the battery is dead?
Nothing, the engine runs off of magnetos
What does the impulse coupling help with?
Supplies the extra push to get the starter going and spinning the propeller
What could happen during a walk around if one had a broken P-lead?
The engine could start, if the propeller was spun or bumped
Why is the mixture pulled out at the end of a flight instead of the ignition?
Leaves the cyclinders without fuel in them, so that an accidental startup can be avoided
Where does the carburetor use heat from?
The exhaust system
The carburetor controls how much fuel mixture is let into the cylinders with the ___ valve
The jet allows a small leak of fuel into the cylinders when the throttle is closed, the airplane is currently?
When a sudden and quick burst of throttle is applied, the ____ pump plunges fuel into the carburetor to avoid the engine from choking on air
What is the best ratio of fuel to air?
Carburetor ice can occur between _____ C to _____ C?
-5C to 15C
What is the type of icing that occurs with visible moisture, and the OAT is at or below freezing?
After applying carburetor heat, what should one expect ot happen to the RPM?
The RPM will fall, and if carb ice is present it will slowly increase
Does the mixture get richer or leaner with the application of carburetor heat?
Is it better to be too rich, or too lean?
What problem can happen with using lower grade of octane then recommended?
detonation can occur
What is a problem that can happen with higher than recommended octane grade usage?
Fouling of the spark plugs
Is it better to use higher or lower octane fuel in emergency situation?
It is better to use a higher grade
What happens to oil temperature as oil pressure decreases?
Quickly entering a descent with throttle idled could lead to what kind of cooling?
The airspeed indicator uses ______ and _____ to measure airspeed
Static port, pitot tube
Airspeed is the difference between ____ air pressure, and ____ air pressure
Impact and static
What two instruments rely solely on the static port?
The vertical speed indicator, and the altimeter
IF the pitot tube is blocked, what will the airspeed indicator do?
It iwll act like an altimeter
What is the Vne speed?
The never exceed speed
The beginning of the white arc is the V___. Which stands for _____?
Vso which stands for power off stalling speed with gear and full flaps extended (full dirty)
What is the velocity of air going over the wings called?
True airspeed (TAS)
What happens to your true airspeed in relative to the indicated airspeed as the aircraft climbs?
It goes up
What is height above ground called?
If you fly from a high to low pressure without changing the altimer setting, will it read too high or too low?
If you are flying at 6500 ft and your altimeter is set to 29.92. What would be your true altitude if the correct setting was 30.92?
Will colder air make your indicated altitude too high or too low in relative to warm air?
How do you find your pressure altitude?
set the altimeter setting at standard pressure (29.92Hg)
What will the altimeter do if the static source is plugged?
Stay at its last altitude
Does the attitude indicator run on static, or impact pressure?
Neither, its gyroscopic
What are the three main gyroscopic instruments?
The attitude indicator, turn coordinator, and the heading indicator
What allows the gyro to remain fixed in space?
Rigidity in space
If you are flying on a heading of south, and make a turn to the east, does the compass lag, or lead?