Flight, Climb, Descending, Turning Flashcards

(70 cards)

1
Q

In level flight what does lift =

A

Weight + tailplane downforce

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2
Q

How do under slung engines affect the downforce required from the tailplane

A

They reduce the force required

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3
Q

What is climb angle related to

A

Air mass

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4
Q

What is flight path related to

A

Ground related

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5
Q

What is the flight path angle

A

Angle between the aircrafts path and local horizon

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6
Q

What are the 2 components of pitch angle

A

AOA

Flight path angle

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7
Q

What is the component of lift that acts downwards in climb

A

Wcosgamma

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8
Q

What is the component of weight along the flight path

A

Wsingamma

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9
Q

What is the equation for excess thrust

A

Singamma = (T-D)/ w

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10
Q

What is the component of weight a acting perpendicular to the flight path

(Also can be lift)

A

L= wcosgamma

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11
Q

Where does Vx occur for a jet aircraft

A

Vmd
4° AOA
Cl/Cd max

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12
Q

Where is Vx for a propeller aircraft

A

Vmp (0.76Vmd)

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13
Q

What is a formula for climb gradient %

A

(Height change x 100) / horizontal distance

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14
Q

What is another equation to calculate % climb gradient

A

Sin gamma = (T-D)/w

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15
Q

What does the “second segment” mean

A

Loss of one of the critical engines

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16
Q

Vmd can be found at tangent to which curves?

A

Drag polar

Power required (different to trust required)

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17
Q

What is the min climb gradient for a twin engine jet in the second segment

A

2.4%

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18
Q

What is the min climb gradient for a 3 engine jet in the second segment

A

2.7%

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19
Q

What is the min climb gradient for a 4 engine jet in the second segment

A

3%

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20
Q

What does descent angle =?

A

Pitch angle + AOA

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21
Q

Is pitch angle positive or negative

A

Negative

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22
Q

Is descent angle positive or negative

A

Positive

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23
Q

What is the equation for angle of descent in still air

A

sin gamma = (D-T) / W

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24
Q

What speed is used in emergency decent and how is this achieved

A

Vmo (velocity max operating)
Mmo (Mach max operating)

Idle power
Spoilers

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25
What is the equation for glide descent
Sin *gamma* = D/W
26
What is the equation for glide range
Height x l/d ratio
27
When is the greatest glide distance achieved
When l/d ratio is greatest
28
What speed do you glide at for max range
Vmd
29
What speed is the best glide endurance
Vmp (0.76Vmd)
30
When will the endurance change with mass
More mass less endurance
31
I’m still air how does mass affect glide range
Same range as Light aircraft
32
In a headwind how does mass affect glide range
Heavy mass = glide further
33
In a tail wind how does mass affect glide range
Light aircraft = further glide
34
What is the formula for centripetal force
= mv^2/r Where v is in m/s
35
What does load factor =
1/cos*angle*
36
What is the equation for angle of bank
Tan *angle* = v^2/ rg Where v is in m/s
37
What effect does mass have on the turn radius
No effect
38
what is a rate 1 turn
3°/ second 1 min / 180° 2 min / 360°
39
What is s rate 2 turn
6°/ second
40
What is a rate 3 turn
9°/ second
41
What is the equation for rate of turn
(TAS / radius) x 60
42
What happens to rate of turn if you double the speed
Double speed = 1/2 rate of turn
43
What is the approx angle of bank in a rate 1 turn
(TAS / 10)+ 7 Where TAS is in knots
44
What effect will w climbing turn have on bank
Tendency to overbank “Climb over things”
45
What effect does a descending turn have on angle of bank
Tendency to under bank “Descend under things”
46
How can side slip be caused
Turned too much
47
How can skid be caused
Not turning enough
48
Do turn coordinators show angle of bank?
NO
49
What happens to controllability when stability increases
Decreases
50
What is positive static stability
Object initially wants to return to equilibrium
51
What happens in neutral static stability
Object wants to initially stay where it is
52
What happens in negative static stability
Object initially moves away from equilibrium
53
What are the 2 ways to maintain equilibrium
Pilot input Trim input
54
What is negative static Negative dynamic Aperiodic stability
Initially moves away from equilibrium and keeps going
55
What is neutral static Neutral dynamic Aperiodic stability
Initially doesn’t move away or closer to equilibrium And remains at a constant distance away from equilibrium
56
What is positive static Negative dynamic Periodic stability
Initially moves towards equilibrium Oscillates Oscillations get bigger and eventually run away and become so big they don’t return to equilibrium
57
What is positive static Neutral dynamic Periodic stability
Initially moves towards equilibrium Oscillations remain at a constant amplitude
58
What is positive static Positive dynamic Aperiodic stability
Initially moves towards equilibrium No oscillations
59
What is positive static Positive dynamic Periodic stability
Initially moves towards equilibrium Oscillates Oscillations decreases in size
60
An aircraft in trim is in equilibrium, but an aircraft in equilibrium is ...
Not necessarily in trim
61
What is the aerodynamic centre
The point around which the pitching moments are constant
62
How to calculate the moments around the pitching centre (aerodynamic centre)
Lxd = m ``` M= monentd D = distance between aerodynamic centre and cp L = lift ```
63
Where is the aerodynamic centre of s symmetrical aerofoil
25% chord
64
Where is the aerodynamic centre for a cambered aerofoil
23-27% chord
65
Where is the aerodynamic centre in supersonic flight
50% chord
66
What is the absolute AOA
The angle between the raf and the aerofoil zero lift line
67
What is the component of lift in the climb
Wcos*angle*
68
What is the component of excess drag in w descent
Wsin*angle*
69
Formula for rate of turn
TAS/ radius x60 Where tas is m/s
70
What is the radius of s turn
V^2/gtan*angle*