ATC Basics Block 2
"The internal pressure of a fluid decreases at point where the speed of the fluid
increases" is part of what principle
A. Bernoulli's Principle
B. Newton's law of motion
C. Hindenburg’s Theory - answer A. Bernoulli's Principle
What is the primary source of lift? - answer Bernoulli’s Principle
What is the secondary source of lift? - answer Newton’s third law
Describe Newton's third law. - answer Upward force generated by air striking the
underside of an airfoil and being deflected downward.
What is relative wind? - answer Direction of airflow produced by object moving through
the air
What direction does relative wind flow? - answer Parallel with and opposite to direction
of flight
Three main airfoils. - answerWing, horizontal stabilizer, prop
What is the chord line? - answerimaginary line from the leading edge to trailing edge of
the wing.
What are the parts of an airfoil? - answerLeading edge, Trailing edge, and Chord line
What is angle of attack? - answerangle between the chord line and relative wind.
Describe camber - answerCurvature of an airfoil, from leading edge to the trailing edge.
What is the shape or form of a wing viewed form above? - answerWing Planform
Four forces affecting flight - answerLift, Weight, Trust, Drag
Three properties that affect air density and A/C performance - answerTemp, Altitude of
elevation, humidity
What is the average surface temp in the U.S. - answer59 degrees.
What is the average lapse rate? - answer3.5 degrees Fahrenheit (2 degrees C) every
1,000 feet.
, What air is denser. Warm or cold? - answerCold
Lower pressure is associated with what kind of air? - answerThin, or less dense air
Does High or Low density altitude indicate thinner air? - answerHigh
List some ways that performance is reduce by Higher density altitude, High temp, and
High elevation - answerLonger takeoff roll, Longer landing roll, Slower climb rate,
Landing speed increased.
Three propeller types - answerAdjustable, (adjust on ground). Fixed pitch. Controllable,
(auto varied in flight.
Longitudinal axis rotates ______ - answerRoll
Lateral axis rotates ________ - answerPitch
Vertical axis rotates ________ - answerYaw
Longitudinal axis controls what? - answerAngle of bank. Heading.
Lateral axis controls what? - answerAngle of attack. Altitude.
Vertical axis controls what? - answerLeft to right. Streamlined motion.
Primary control surfaces - answerAilerons, Elevator, Rudder
Ailerons controls _____ - answerRoll
Elevator controls _______ - answerPitch
Rudder controls ________ - answerYaw
Ailerons are where on the A/C - answerOutboard trailing edge of the wing. Rotates on
longitudinal axis.
What is adverse yaw? - answerTendency of nose of A/C to yaw in opposite direction of
turn. caused by drag of down aileron
Elevator is where on the A/C and what does it control. - answerRear of horizontal
stabilizer. Rotates on lateral axis. controls angle of attack.
What is the rudder located on the A/C and what does it control. - answerAft of vertical
stabilizer. Rotates on vertical axis. Controls yaw.
"The internal pressure of a fluid decreases at point where the speed of the fluid
increases" is part of what principle
A. Bernoulli's Principle
B. Newton's law of motion
C. Hindenburg’s Theory - answer A. Bernoulli's Principle
What is the primary source of lift? - answer Bernoulli’s Principle
What is the secondary source of lift? - answer Newton’s third law
Describe Newton's third law. - answer Upward force generated by air striking the
underside of an airfoil and being deflected downward.
What is relative wind? - answer Direction of airflow produced by object moving through
the air
What direction does relative wind flow? - answer Parallel with and opposite to direction
of flight
Three main airfoils. - answerWing, horizontal stabilizer, prop
What is the chord line? - answerimaginary line from the leading edge to trailing edge of
the wing.
What are the parts of an airfoil? - answerLeading edge, Trailing edge, and Chord line
What is angle of attack? - answerangle between the chord line and relative wind.
Describe camber - answerCurvature of an airfoil, from leading edge to the trailing edge.
What is the shape or form of a wing viewed form above? - answerWing Planform
Four forces affecting flight - answerLift, Weight, Trust, Drag
Three properties that affect air density and A/C performance - answerTemp, Altitude of
elevation, humidity
What is the average surface temp in the U.S. - answer59 degrees.
What is the average lapse rate? - answer3.5 degrees Fahrenheit (2 degrees C) every
1,000 feet.
, What air is denser. Warm or cold? - answerCold
Lower pressure is associated with what kind of air? - answerThin, or less dense air
Does High or Low density altitude indicate thinner air? - answerHigh
List some ways that performance is reduce by Higher density altitude, High temp, and
High elevation - answerLonger takeoff roll, Longer landing roll, Slower climb rate,
Landing speed increased.
Three propeller types - answerAdjustable, (adjust on ground). Fixed pitch. Controllable,
(auto varied in flight.
Longitudinal axis rotates ______ - answerRoll
Lateral axis rotates ________ - answerPitch
Vertical axis rotates ________ - answerYaw
Longitudinal axis controls what? - answerAngle of bank. Heading.
Lateral axis controls what? - answerAngle of attack. Altitude.
Vertical axis controls what? - answerLeft to right. Streamlined motion.
Primary control surfaces - answerAilerons, Elevator, Rudder
Ailerons controls _____ - answerRoll
Elevator controls _______ - answerPitch
Rudder controls ________ - answerYaw
Ailerons are where on the A/C - answerOutboard trailing edge of the wing. Rotates on
longitudinal axis.
What is adverse yaw? - answerTendency of nose of A/C to yaw in opposite direction of
turn. caused by drag of down aileron
Elevator is where on the A/C and what does it control. - answerRear of horizontal
stabilizer. Rotates on lateral axis. controls angle of attack.
What is the rudder located on the A/C and what does it control. - answerAft of vertical
stabilizer. Rotates on vertical axis. Controls yaw.
