AVSC 3530 Advanced Aerodynamics
What is the approximate parasite drag coefficient of the Piper Warrior?
0.034
When was the first manned flight of a heavier-than air craft?
1853
When was the first sustained, controlled, and powered flight?
1903
Refer the the image below. The aircraft represented in this chart is in trim condition at what degree of angle of attack? (Enter the numeric value (e.g., one would be entered 1, two would be entered 2, etc.) (The graph is a negative sloped line intercepting x-axis at 2.)
2
Which airfoil below has its maximum camber furthers from the leading edge?
3610
Which airfoil below exhibits the greatest maximum thickness?
4120
Which series of airfoils were first used in the wing of the P-51 Mustang for their low-drag qualities?
6-series
At what speed does a turbofan have its peak efficiency?
700 mph
What is the study of the behavior of moving air and the forces that it produces?
Aerodynamics
Which of the following will lift in a static air mass?
Aerostatic vehicles
What are the primary turning controls of an airplane?
Ailerons
Which of the following is illustrated by the equation: (static pressure + dynamic pressure)?
Bernoulli's equation
Archimedes discovered which of the following?
Buoyancy principle
Burt Rutan, with his VariEze, were leading proponents in the design of what?
Canards
The fuselage configuration that resulted from the area rule was commonly referred to as which of the following?
Coke-bottle fuselage
Dr. Bernard H. Carson said that operating at what speed is "the least wasteful way of wasting fuel"?
Cruise-optimum airspeed
Which of the following are parts considered in landing distance?
Distance to clear Actual landing roll distance
What is the method of calculating drag for various components and summing them for total airplane parasite drag?
Drag breakdown
Which of the following is represented by how rapidly oscillations dampen out?
Dynamic stability
Refer to the image below. Lines A through E each represent a different aircraft. Which of the following statements are true regarding these aircraft? Select all that apply.
E is the most stable A & B are unstable
What is the device that should block the flow of air around the tip?
Endplates
What is the time that an airplane can remain aloft on a certain amount of fuel?
Endurance
What is the difference between maximum power available and power required?
Excess power
A desirable situation is one in which the airplane is always stable.
False
On a twin-engine aircraft, the additional engine is meant to be a spare.
False
On power curves for higher altitude, the power curves come closer together, resulting in more excess horsepower.
False
Rolling, in itself, produces a restoring moment.
False
The larger the bypass ratio, the less efficient the powerplant becomes.
False
Whitcomb's findings supported the theory that the drag depended more on the shape rather than the amount of cross-sectional area.
False
What is the moveable portion of the airfoil that is deflected through some angle from the original chord position to yield a higher camber?
Flap
Whether a boundary layer is laminar or turbulent depends on which of the following?
Fluid velocity Distance downstream Kinematic viscosity
Thrust is what component of lift?
Forward motion
Which of the following represents how much of the weight becomes a retarding force (at landing)?
Friction coefficient
What has been the driving parameter in new aircraft designs?
Fuel efficiency
What aspect of gliding performance is usually of most concern to pilots?
Glide ratio
Which of the following is true of high camber?
High camber produces high drag High camber creates greater lift
Which of the following are effects of reduced weight on the power required curve?
Higher rate of climb Lower power required Greater excess power
What type of drag results directly from the production of lift?
Induced drag
What special type of parasite drag arises due to the juncture of two different bodies?
Interference drag
An airfoil is classified as 0015 using the NACA four digit series and has a 75-inch chord. What can you tell about the airfoil given this information? Select all that apply.
It is symmetrical The maximum thickness is 11.25 inces
Which of the following scientists developed much of the classical theory of flight?
Joukowsky Lanchester Prandtl
Which of the following are ways that fluids can flow?
Laminar Turbulent
What is the transition from flight to ground operation?
Landing
Which type of stability has the primary concern in stabilizing motion about the roll axis?
Lateral stability
Which of the following are environmental factors that favorably affect takeoff distance?
Level or downhill slope High headwind Low temperature
What term refers to a force that is equal to or greater than the weight of an object and acts in the opposite direction of gravity?
Lift
Which of the following are true of airplane stability?
Lightplanes are most stable than fighters Different airplanes vary in their degrees of stability Transport aircraft are more stable than most general purpose lightplanes
Which of the following are disadvantages of the canard arrangement?
Limited center of gravity travel Destabilizing Deepened stalls
What is the maneuver force in a particular direction divided by the weight of the aircraft?
Load factor
Which of the following are factors that tend to increase induced drag?
Low wingspan Low velocity High weight
Hypersonic effects take place at about what Mach number?
Mach 5
Which of the following is expressed in the formula: (True airspeed / Speed of sound)?
Mach number
There is not enough aerodynamic force on the rudder to create sufficient correcting torque when going slower than what speed?
Minimum control speed
Who designed and constructed the first hot air balloon?
Montgolfier brothers
Which of the following causes lift?
Net force in the upward direction Imbalance of pressure forces between the top and bottom of the airfoil
On the high-speed side of the power curve, most of the drag is due to which type of drag?
Parasite drag
What refers to how fast it will go, how fast it will climb, how quickly it will take off and land, and how far it will go?
Performance
What special type of parasite drag is simply the wing's parasite drag?
Profile drag
Which of the following is called an "airscrew" by the British?
Propeller
In which of the following does all of the air flow through the combustion section and get accelerated to high velocity?
Pure turbojet
Which aircraft, designed by a former Piper engineer incorporates a scaled-down copy of the Malibu wing and tail, and can achieve more than 240 knots at cruise, with climb of more than 2,000 fpm?
Questair Venture
What is the simplest form of jet engine?
Ramjet
What is the amount of fuel on board multiplied by the specific range?
Range
Which of the following is expressed in the formula: (Excess power / Weight)?
Rate of climb
Equivalent flat plate area is expressed by which of the following?
Ratio of parasite drag to dynamic pressure
What was the first engine to successfully power an airplane?
Reciprocating engine
What is an internal combustion engine without pistons?
Rotary engine
What was the first engine to solve the problem of the weight from a liquid-cooled system?
Rotary engine
The airplane is controlled in yaw by use of what?
Rudder
Which of the following contribute to a stall?
Sharp leading edge Unfavorable pressure gradient Surface friction
Who succeeded in briefly lifting into the air a huge machine propelled by a powerful steam engine in 1894?
Sir Hiram Maxim
Which of the following are disadvantages of flying wings?
Size Longitudinal stability and control
A cambered airfoil that would develop zero lift would have what angle of attack?
Slightly negative
What is probably the foremost advantage of air travel?
Speed
Which of the following is/are a means of pitch control?
Stabilator Elevator
What term refers to the airplane's tendency to return to the trimmed condition after a disturbance?
Stability
What was the first totally composite constructed aircraft to be certified?
Starship
Which of the following has the primary purpose of reducing the local Mach number of the flow over the wing?
Swept wing
An airfoil is classified under the NACA four digit series as 2615. Using this information, which of the following is true regarding this airfoil?
The airfoil has a thickness of 15% of the chord
An airfoil is classified under the NACA four digit series as 3110. Using this information, which of the following is true regarding this airfoil?
The maximum camber is located .1 chords from the leading edge
Lift comes from which of the following?
The net pressure of the top and bottom surfaces
For a container filled with fluid to rise within surrounding fluid, which of the following must be true?
The total weight of the container and the fluid inside it must be less than the weight of the amount of fluid it displaces
The rate of turn is equal to which of the following?
The velocity of the airplane divided by the radius
Which force(s) is(are) positive accelerating forces in takeoff?
Thrust
Which of the following is made up of the sum of the parasite drag and the induced drag?
Total drag
A decrease in forward velocity will increase angle of attack.
True
A winglet on the propeller tip has the very same effect as on the wingtip.
True
Air is compressible and has no specific amount of weight associated with a certain volume.
True
If a wing is swept aft, only a component of the velocity of the air will flow over it chordwise.
True
The highest possible altitude for a given power setting is the most economical.
True
There is a definite angle of attack associated with stall for each airfoil section.
True
Which of the following terms mean that the airplane neither speeds up nor slows down?
Unaccelerated
Aerodynamic stability in yaw is called what?
directional stability
The tendency of a disturbed aircraft over time to return to its original condition is known as
dynamic stability
The tendency of a disturbed aircraft to continue away from the trimmed condition is known as
instability
Aerodynamic stability in roll is called what?
lateral stability
Aerodynamic stability in pitch is called what?
longitudinal stability
Consider a graph when pitching moment is plotted against degrees of angle of attack. The slope of the line of unstable aircraft plotted on this graph will be
positive
Refer to the image below. This aircraft has what type of stability? (negative sloped line intercepting at 2)
positive
The tendency of a disturbed aircraft to return to the trimmed condition is known as
stability
