aero Flashcards

0
Q

which wing is more ideal aerodynamically

A

elliptical

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1
Q

which wing is somewhat more superior aerodynamically

A

high wing

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2
Q

what wing is least expensive to manufacture

A

rectangular

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3
Q

most expensive wing

A

elliptical

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4
Q

what’s the best compromise between all types of wings

A

tapered rectangular

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5
Q

what is the most important factor in determining the power plant of an airplane

A

power/weight ratio

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6
Q

what is the part that most enhances the visual appeal of an airplane

A

tail

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7
Q

of all wings out there what wings provide the best lateral stability

A

high wing

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8
Q

what category airplane is cat is far 23

A

utility

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9
Q

what aerodynamic benefits are there with a swept tail

A

NONE

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10
Q

of all aircraft manufacturers before 1970 which one was most successful with drag cleanup

A

mooney

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11
Q

what are the main advantages of canard airplane

A

nose up lifting force

high lift/drag ratio

reduction of drag

harder to stall recovery is easy

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12
Q

high aspect ratio increase or decrease aircraft performance

A

increase

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13
Q

what’s a disadvantage of canard airplane

A

less cg range

longer ground roll

very careful balancing between canard and wing

canard lifts nose up all the time could be destabilizing

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14
Q

on flying wing that short arm from leading edge to the center of wing means that you have a lower cl max on a wing what does that do for ground roll

A

increase significantly

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15
Q

how do you get tail down force on a flying wing

A

back of wing is curled up

reflexive tail

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16
Q

sweet back wings allow planes to Travel faster how?

A

decreases critical Mach number

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17
Q

increasing effective aspect ratio of wing

A

reducing induced drag

increases climb performance and range

decreasing ground roll distances

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18
Q

what is stability

A

tendency of an airplane to returned to a trimmed position after a disturbance

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19
Q

what opposes load factor

A

resultant component of lift

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20
Q

dynamic stability

A

stability over time

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21
Q

for a plane to be dynamically stable what must it have first

A

static stability

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22
Q

what is the definition in speed of supersonic

A

Mach 1.2 -5

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23
Q

when am airfoils upper surface has reached Mach 1 what have you hit

A

critical Mach number

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24
what happens to drag at critical Mach
significantly increases
25
proppellers take a _________amount of air and create ________ amount of velocity
large , small
26
what's the definition of Endurance
most time aloft on a given amount of fuel
27
how do you determine aspect ratio of a wing
span of wing divided by average chord
28
air molecules moving over the upper surface of the wing travel faster or slower than the bottom of the wing
faster
29
what do vortex generators do
Imparts energy into the airfoil to keep air laminar
30
most expensive engine
turbojet engine engine
31
what is least expensive engine
reciprocating engine
32
best fuel conservation
reciprocating engine
33
when bank angle increases what also increases
stall speed / load factor
34
as airspeed increases what also increases
induced drag decreases with airspeed
35
what is specific fuel consumption
pg 226
36
aspect ratio
span divided by mean chord
37
what happens to a plane in ground effect
induced drag is reduced because the wingtip vortices aren't fully formed under wing
38
why is LD max important
maximum glide speed and max glide angle
39
newton third law
for every action there is an equal and opposite reaction
40
Newton's first law motion
an object at rest sill stay at rest
41
newtons 2nd law of motion
an object at rest will stay at rest unless something affects it
42
what is the line from leading edge from camber to trailing edge
mean camber line
43
when airflow over the wing adheres to the surface what kind of airflow is it
laminar
44
what can upset laminar airflow
exceeding the critical layer of attack ice rivets spoilers
45
what is the one factor that increases induced drag more than another factor
slow flight high angle of attack
46
what is the best thing you can do. together. the minimum amount of induced drag
clean configuration cruise flight
47
definition of range
max distance for given amount of fuel
48
5-27
load limit va
49
three axis of flight center of gravity
an
50
what kind of stability does aileron deflection affect
lateral
51
what kind of stability Is determined by CG
longitudinal
52
what stability does Dihedral affect
lateral
53
elevator Affects what stability
longitudinal
54
fuselage effect affects what stability
longitudinal
55
tail down force affects what stability
longitudinal
56
vertical stabilizer
directional
57
weathervaning effects what stability
directional
58
wing taper affects what stability
lateral
59
horizontal stabilizer affects what type of stability
longitudinal
60
what do vortex generators on top of the wing do?
impart energy to the wing to aid the laminar flow of air
61
under 12500 lbs
FAR 23
62
largest develop,ent in aviation in the last 100 years
the jet engine
63
write the coefficient of lift formula and choose the two areas that pilots have control over
Cl= lift/ 1/2 dynamic pressure x V^2 x SA
64
calculate the rate of climb for excess engine power
RC= (changeP) x 33,000