Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
73 Cards in this Set
- Front
- Back
|
Elevator : …. about … axis
Aileron : …. about … axis Rudder : …. about … axis |
pitch / lat
roll / long yaw / norm |
|
|
Secondary control surfaces (3)
|
trim tabs
spoilers slats / flaps |
|
|
When a control surface moves ,
…. @ deflected side ... |
dynamic Px / increases
|
|
|
Split flight control
e.g ... prevents ... |
in/out board aileron
undue load / wing twist |
|
|
Elevator reversal
occurs @ … when …. causes a ….. @ ….. |
hi speeds
air load twisting moment deflected surface |
|
|
Aileron reversal
occurs @ … when ….. increase the … @ … causing …. to decrease hence canceling the ... |
hi speeds
air load lift / TE of wing wing incidence lift |
|
|
in Differential aileron the … aileron travels further
|
up
|
|
|
in … Aileron
the LE of … aileron protrudes below casing more drag on … wing |
Frise
Up down going |
|
|
Tabs are used for … (3)
|
trimming
control balance servo operation of control surface |
|
|
Servo Tabs
move in …. FC surface (dir) helps to move a large control surface …..ly |
opposite direction to
aerodynamically |
|
|
Balance Tab helps to move FC surface by ……………. .
|
automatically moving @ opposite direction
|
|
|
Anti Balance Tab moves in …. to FC surface (dir)
helps the pilot to ... |
same direction
have more feel |
|
|
Spring Tab is a modified …
it reduces force required at ... |
servo tab
hi speeds |
|
|
Horn balance is a …….
provides a …….. @ …. to ….. helps to ... |
protruding control surface
balancing lift / opp / main lift reduce hing moment |
|
|
Set Back hinges position : ..
what it dose ... |
back into control surface
reduces moment from CP to hing |
|
|
Control surface
mass balancing in at ... |
front of hing
|
|
|
…. is a mechanical balancing to prevent ….
|
mass balancing
flutter |
|
|
…. aileron are used in STOL
where aileron act as …. |
drooped
flaps |
|
|
Adverse yaw is caused by drag being more on … wing ,
that is …. aileron |
up going
down going |
|
|
Adverse yaw control (3)
|
differential aileron
frise spoilers |
|
|
Yaw induced adverse rolling motion
occurs @ … where …. causes a …. @ ... |
hi speed
redder deflection sideway force / opposite direction |
|
|
Trim position is held in position by a ….
which at failure causes …. |
brake system
runaway elevator / stab |
|
|
Vortex generator prevents …. and ….
|
early separation
span-wise airflow |
|
|
Vortex generators are mounted …. with a height of ...
|
behind LE
2-3 times the Boundary layer |
|
|
Notched or Saw tooth LE
helps to ... |
reduce spanwise flow
|
|
|
…. are like vortex generators
supplied from ….. |
blowers
hi speed air from engine |
|
|
In ….
pilot is NOT connected to the controls |
powered control
|
|
|
in …
pilot IS connected to the controls |
power assisted
(hydraulically) |
|
|
Artificial feel system
is used bcz power control systems are … so pilot can … to prevent ... |
irreversible
recognize input requirements over-stressing |
|
|
Spring Box
is the simplest form of …. fitted at …. |
Artificial feel system
control run |
|
|
Spring Box
gives …. and …. disadv: …. |
feel / self centering
constant force |
|
|
Q feel
based on …. provides …. to …. and ... |
dynamic Px
progressive feel varying deflection / speeds |
|
|
Q feel
principle is to …. pilot ... |
oppose
inputs |
|
|
Q feel
inputs are (2) |
static and dynamic pressure
control surface angle of deflection |
|
|
Dutch Roll
is due to …. insufficient for …. |
fin area
natural oscillatory stability |
|
|
Yaw damper has a …. which senses yaw chx to apply ...
|
yaw rate gyro
opposite force |
|
|
Roll damper job (3)
|
help YD
roll damp @ turb spiral stability |
|
|
Parallel YD
Rudder control <> Pilot control? so the pilot …. |
on the same control run
can feel it (pedals move) |
|
|
Series YD
Rudder control <> Pilot control? so the pilot ... |
independent of rudder
can not feel |
|
|
Parallel / Series YD
usage @ T.O. and landing ? |
Parallel → no
Series → OK :) |
|
|
Direct lift controls
is to maintain ….. @ …. consist of … / … / ... |
constant body att angle / approach
spoiler / elevator / stab |
|
|
A stuck stabilator causes … and … to decrease
|
long stability
elevator pitch capability |
|
|
At stuck stabilator
reduce speed (late/ soon) use red/inc flap for landing |
late
reduced |
|
|
best CG position @ jammed elev/stab is ...
|
aft
|
|
|
Dutch Roll
is due to …. insufficient for …. |
fin area
natural oscillatory stability |
|
|
Yaw damper has a …. which senses yaw chx to apply ...
|
yaw rate gyro
opposite force |
|
|
Roll damper job (3)
|
help YD
roll damp @ turb spiral stability |
|
|
Parallel YD
Rudder control <> Pilot control? so the pilot …. |
on the same control run
can feel it (pedals move) |
|
|
Series YD
Rudder control <> Pilot control? so the pilot ... |
independent of rudder
can not feel |
|
|
Parallel / Series YD
usage @ T.O. and landing ? |
Parallel → no
Series → OK :) |
|
|
Direct lift controls
is to maintain ….. @ …. consist of … / … / ... |
constant body att angle / approach
spoiler / elevator / stab |
|
|
A stuck stabilator causes … and … to decrease
|
long stability
elevator pitch capability |
|
|
At stuck stabilator
reduce speed (late/ soon) use red/inc flap for landing |
late
reduced |
|
|
best CG position @ jammed elev/stab is ...
|
aft
|
|
|
Best CG position
for a failed elevator feel system |
FWD
|
|
|
Mach trimmer is receptive to ...
|
Mach No.
|
|
|
Spoilers are use for (3)
|
roll control (imbalance lift)
lift dumping (brake eff inc) air brake |
|
|
Spoilers can help reduce
aileron ….. / …. …. @ hi mach numbers |
reversal / bending
adverse yaw |
|
|
Non Differential spoilers
summary ! |
extend one side
not retract the other |
|
|
Differential spoilers
summary ! |
extend one side
DO retract the other |
|
|
Non Differential spoilers
already fully extended how to roll? |
both remain extended
roll by aileron only !! |
|
|
Spoiler advantage over Aileron
limited aileron …. and …. |
size / effectiveness
|
|
|
Spoiler advantage over Aileron
too large aileron @ swept causes ... |
reversal @ hi speed
|
|
|
Spoiler advantage over Aileron
spoiler is immune to …. that reduces aileron effectiveness . |
spanwise flow
|
|
|
Phenomenon @ which spoilers retract to / near position
|
blow back
|
|
|
LE slat effect on
camber area …. MAC … CL Max ... |
increase
increase increase |
|
|
TE flaps increases
wing …… / … / … (shape) |
geometric chord line
camber area |
|
|
Effect of flap @ pitch moment
due to lift increase : ... |
pitch up
(CP fwd of CG) |
|
|
Effect of flap @ pitch moment
CP moment effect:... |
if moves back → ND
|
|
|
Effect of flap @ pitch moment
Downwash effect : … (3) |
downwash ↑
T.plane AOA ↓ ⇒ NU |
|
|
Effect of flap @ pitch moment
drag effect ... |
depends on flap being abv/blw
the lateral axis NU / ND |
|
|
Flap raising without compensation results in ...
|
loss of lift
|
|
|
Stich shaker activates @ ...
|
1.13 Vs
|
