Avit 323- Block 9 (Dilse) UPDATED Exam
Questions and CORRECT Answers
What are the two axis labeled on a stall diagram sheet - CORRECT ANSWER -
Coefficient of lift
Angle of attack
Planform - CORRECT ANSWER - the shape of the wing viewed from above
Chord line - CORRECT ANSWER - An imaginary straight line from the leading edge to
the trailing edge of an airfoil.
Camber - CORRECT ANSWER - A measure of the curvature of the airfoil.
Adverse pressure gradient - CORRECT ANSWER - A pressure gradient of increasing
static pressure in the direction of airflow.
Aspect ratio - CORRECT ANSWER - The relationship of width to height
-High aspect ratio: longer wing (glider)
-Low aspect ratio: shorter wing (fighter)
Bernoullis principle - CORRECT ANSWER - as the velocity of a fluid increases, the
pressure exerted by the fluid decreases
Magnus Effect - CORRECT ANSWER - Deviation in the trajectory of a spinning object
toward the direction of spin
Newtons 1 law - CORRECT ANSWER - An object at rest stays at rest and an object in
motion stays in motion with the same speed and in the same direction unless acted upon by an
unbalanced force.
, Newtons 2 law - CORRECT ANSWER - Force=MA
Newtons 3 law - CORRECT ANSWER - For every action there is an equal and opposite
reaction
Conservation of mass - CORRECT ANSWER - the principle stating that matter is not
created or destroyed during a chemical reaction
Conservation of energy - CORRECT ANSWER - Energy cannot be created or destroyed
Laminar flow - CORRECT ANSWER - Flows in parallel lines in a smooth progression
-Higher stall speed
-Separates earlier
-More pressure drag
-Less viscus drag
Turbulent flow - CORRECT ANSWER - Irregular flow with random variations in
pressure.
-Lower stall speed
-Separates later
-Less pressure drag
-More viscus drag
Describe a stall - CORRECT ANSWER - when the airplane exceeds the critical angle of
attack and is unable to produce lift
Favorable stall progression/ways to ensure favorable stall progressions - CORRECT
ANSWER - Hershey bar: rectangle wing, stalls at root first
Questions and CORRECT Answers
What are the two axis labeled on a stall diagram sheet - CORRECT ANSWER -
Coefficient of lift
Angle of attack
Planform - CORRECT ANSWER - the shape of the wing viewed from above
Chord line - CORRECT ANSWER - An imaginary straight line from the leading edge to
the trailing edge of an airfoil.
Camber - CORRECT ANSWER - A measure of the curvature of the airfoil.
Adverse pressure gradient - CORRECT ANSWER - A pressure gradient of increasing
static pressure in the direction of airflow.
Aspect ratio - CORRECT ANSWER - The relationship of width to height
-High aspect ratio: longer wing (glider)
-Low aspect ratio: shorter wing (fighter)
Bernoullis principle - CORRECT ANSWER - as the velocity of a fluid increases, the
pressure exerted by the fluid decreases
Magnus Effect - CORRECT ANSWER - Deviation in the trajectory of a spinning object
toward the direction of spin
Newtons 1 law - CORRECT ANSWER - An object at rest stays at rest and an object in
motion stays in motion with the same speed and in the same direction unless acted upon by an
unbalanced force.
, Newtons 2 law - CORRECT ANSWER - Force=MA
Newtons 3 law - CORRECT ANSWER - For every action there is an equal and opposite
reaction
Conservation of mass - CORRECT ANSWER - the principle stating that matter is not
created or destroyed during a chemical reaction
Conservation of energy - CORRECT ANSWER - Energy cannot be created or destroyed
Laminar flow - CORRECT ANSWER - Flows in parallel lines in a smooth progression
-Higher stall speed
-Separates earlier
-More pressure drag
-Less viscus drag
Turbulent flow - CORRECT ANSWER - Irregular flow with random variations in
pressure.
-Lower stall speed
-Separates later
-Less pressure drag
-More viscus drag
Describe a stall - CORRECT ANSWER - when the airplane exceeds the critical angle of
attack and is unable to produce lift
Favorable stall progression/ways to ensure favorable stall progressions - CORRECT
ANSWER - Hershey bar: rectangle wing, stalls at root first
