Questions tagged [flight-controls]

Use for cockpit controls (trim, yoke, etc). Use [control-surfaces] for the surfaces that actually move.

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12
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1answer
964 views

How are control surface problems in wings having high bending dealt with?

In some aircraft which have large wing deflection due to bending, do ailerons or flaps not get stuck or bent themselves? In the case where hinging axis is also bent how do ailerons operate?
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3answers
3k views

Unclear about how you can have high RPM but no power

I did see this question: Manifold pressure vs power vs rpm But I'm still a bit unclear about the following. I've only flown cherokee pa28s, so I might not have empirical knowledge of the following. I ...
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3answers
153 views

How the AOA, Pitch and FPA are changing during a flight maneuver

For a steady state flight, there is a equation that FPA + AOA = Pitch, but how these three variables are correlated during a flight maneuver like currently I am in a leveling flight and then I want to ...
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2answers
203 views

What are specified rudder pedal forces?

Zeus have previously provided us with links to aviation certifications standards (e.g. FAR 23.155, FAR 23.397). I think Far 23.155 specifies the forces to provide maximum elevator control signal. But ...
2
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1answer
74 views

How does the flight controls performance differ in a compressible and in compressible environment?

I know that in low speed flight compressibility effect is negligible and in high speed there will be an effect but how do they differ in flight controls such as primary and secondary?
2
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1answer
165 views

How can PreciseFlight speedbrakes double the drag while being so small?

Look at this photo of some PreciseFlight© speed brakes: On the website it is claimed that these little red plates can double drag and descent rates. I cannot believe that. Can this be true, and if ...
0
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3answers
144 views

Forward slip dynamics

I am perplexed on the dynamics of the forward slip. I am illustrating here: The intended ground flight path is axis +y, and the plane is forward slipping by banking right + left rudder. In order to ...
9
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1answer
856 views

OV-10 Bronco using airbrakes to fight adverse yaw?

Watching this Bronco display, perhaps this is an incorrect observation, but it looks like the airbrakes are independently used to counteract adverse yaw. What is the domain of use for these airbrakes? ...
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2answers
133 views

Can aileron control maintain track in a single engine failure on a twin?

Let us say I am flying a twin-engine aircraft and I got a engine failure during cruise, without any control on rudder and use the ailerons only, can I still maintain the target track or heading? Will ...
0
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1answer
227 views

How does the Bell V-280 (a tiltrotor) rotate, bank, and fly sideways? [duplicate]

Here is a video of Bell V-280 Valor. Seems like the old definition of airplane's control is no longer hold for this kind of airplane. If you click the link, it will go directly to the part I want to ...
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2answers
651 views

Can the rudder be considered part of the vertical stabilizer, and the elevator part of the horizontal stabilizer?

Or is it strictly correct to say these are separate elements, and you can't call the whole a "stabilizer"?
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3answers
770 views

How do airplane balance tabs (or control tabs) change the force on the pilot's controls?

According to the PHAK ch. 6 and this description regarding Ameristar 9363, one type of tab on an elevator is supposed to "decrease the pressure the pilot needs to exert on the flight controls.&...
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2answers
2k views

What does the "MAX EMR PWR" lever do in a Quest Kodiak?

On a photo of the Quadrant of a Kodiak Quest 100 there was an additional red lever to the left of the throttle (black handle) labeled with "MAX EMR PWR". Can anyone explain what what this ...
2
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1answer
162 views

When the F 16 landing the flaperons are used for rolling due to the functionality as ailerons, but after touching the ground it is the same?

In landing gains the flaperons are down 20 degrees. If you have to do corrections of the bank angle on approach then you move upward only one of the flaperons. But after touching the runaway it is ...
1
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1answer
114 views

How do you quantify rudder effectiveness as a function of bank angle?

I'm currently reviewing just for fun aircraft dynamics based on OEI (one engine inoperative) scenarios. After reading that "lower pedal forces at higher bank angles" are required, it got me ...
5
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4answers
462 views

Can any helicopters use negative collective to descend rapidly?

On a helicopter, the collective is used to adjust the attack angle of all the main-rotor blades in the same direction by the same amount, causing the amount of lift generated to increase or decrease ...
4
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0answers
99 views

Does a B777 have a control priority button?

There have been accidents where one pilot gets confused, panics, inappropriately pulls or pushes the control column, and the other pilot does not manage to get control from them and the aircraft ...
-1
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1answer
439 views

Why doesn't the A-4 Skyhawk require rudder in coordinated turns like on other Century Series aircraft?

The Douglas A-4 Skyhawk is a subsonic jet aircraft design from the early fifties. Usually, in order to make a coordinate turn without skidding or slipping , the pilots of the other types of aircrafts ...
14
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3answers
4k views

Best way to correct for plane's natural tendency to turn left?

I am a new private pilot in training. I've only had about two hours of flight lessons so far, so I'm still quite new to this. In a single engine, PA-28-181 Archer, I found that the plane has a natural ...
5
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3answers
338 views

What is the purpose of attaching a flat plate to the rudder trailing edge?

These are photos of Tecnam P2006T rudder trailing edge. Why it has such flat plate mounted at the end of the rudder?
3
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1answer
251 views

On a Gulfstream jet checklist, do you do the walkaround before or after disengaging the gust locks?

On a Gulfstream jet checklist, do you do the walkaround before or after disengaging the gust locks? With small planes we generally remove the gust locks as we do the walk around, but with a larger jet ...
5
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3answers
876 views

What is the meaning and origin of the phrase “dead band” in relation to flight controls?

A quote from the Boeing 737 NG FCTM: With both hydraulic systems A and B inoperative, the ailerons and elevator are controlled manually. A noticeable dead band will be observed in both of these ...
4
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1answer
218 views

Why do helicopters not flip when using cyclic pitch control to move?

Let's say a helicopter wants to move forward. To do so, cyclic pitch is applied to the blades 90 degrees off which applies a torque on the blades to tilt the craft forward. Once the helicopter is ...
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1answer
227 views

Does any USAF fighter jet use surfaces near the front for pitch control?

Some European fighters like Eurofighter use frontal surfaces for pitch control. Does any US fighter use this configuration? And what are these surfaces called?
5
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2answers
622 views

What control inputs are required to perform a "turning-while-in-flight" maneuver in a helicopter?

My question is relatively simple and has to do with the required control inputs to perform a simple turning maneuver over a large area. Suppose a helicopter is traveling in forward flight, straight ...
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5answers
307 views

In theory, can jetliners remain controllable after losing the entire tail section?

The scenario here is a detachment of the tail,one with the whole empennage. Could a variant of an existing model of swept winged jet airliner be made to remain controllable, using ailerons, ...
16
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3answers
5k views

How and why can multiple people control the Boeing B-29?

I am making a down-to-the-1/128th-inch (literally, to the 1/128th inch) model of the Boeing B-29 Superfortress in SketchUp. Starting from zero, I had to make the entire plane up, and to be honest it ...
7
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3answers
348 views

Why do X-wing configurations missile/guide bombs use symmetric airfoils?

From all the missiles/guide bombs I have come across, I've always observed that a symmetric airfoil is used for both the wing and tail. Why not have a cambered airfoil for the wing and a symmetric ...
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0answers
36 views

Choosing $\phi/\beta$ in Lateral-directional control design

In designing the Lateral-directional controller for aircraft, there is a parameter called $\phi/\beta$ that is defined as the ratio of the magnitude of the bank angle to the sideslip envelopes in the ...
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3answers
409 views

Why would an artificial horizon's roll axis be different on ground and in flight?

Sorry, if I'm a bit verbose here, but since I don't understand the problem, I have difficulties to describe it. I created an artificial horizon using an Adafruit precision 9 DoF sensors and their AHRS ...
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2answers
99 views

Light aircraft elevator/aileron/direction not working [closed]

What is the correct procedure if a light aircraft (under1000kg) elevator/aileron/direction stop working? Is it alright to use the ballistic parachute(if the aircraft is equipped with one)? If not, ...
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1answer
116 views

What does gravity compensation do in flight control?

In flight control designs for lateral directional movement, there is a block named "gravity compensation". This block changes yaw rate measurement from "$r$" to "$r-g/Vcos(\...
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2answers
182 views

Where do flight sims get their data on aircraft flight characteristics?

Flight sims offer very realistic simulations of how a particular aircraft feels, claimed by pilot interviews on youtube. But how do sims get their data? First, does all this data even exist, i mean ...
2
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1answer
948 views

Are aircraft certified for inflight thrust reversal required to demonstrate controllability in an asymmetric-reverse-thrust scenario?

For most jetliners, the inflight use of reverse thrust is prohibited (and often physically impossible), due to the potential for loss of control in the event of an inflight reverser deployment (a ...
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2answers
3k views

Why do the ailerons of this flying wing work oppositely compared to those of an airplane?

I made this simple wing glider and put some ailerons on it. I thought that the ailerons in this glider would work the same way it works on airplanes, wherein the roll will be in the direction of the ...
5
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1answer
777 views

How do tailless aircraft yaw? [duplicate]

I was doing research on control surfaces present on an aircraft and I noticed that some aircraft like the B2 Spirit does not have a vertical tail stabilizer and therefore no rudder either. How do ...
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0answers
168 views

Why aren't rudders automatic? [duplicate]

Why aren't rudder pedals automatic or connected with ailerons to keep the nose of the aircraft coordinated with the turn its entering? Wouldn't this make for an easier and smoother to operate aircraft?...
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0answers
122 views

Does the routine flown by the Thunderbirds in the F-16 feature true sustained knife-edge flight?

Does any aerobatic routine flown by the USAF Thunderbirds in the F-16 feature true sustained knife-edge flight? By "true sustained knife edge flight" we mean that the aircraft is maintaining ...
3
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1answer
252 views

Why is there a difference in the max spoilers extension between the A320 and A321 in a roll?

I was recently reading the Flight Controls chapter in the FCOM and I read that spoilers 2-5 extend a maximum of 35 degrees on the A320 however on the A321 spoilers 2,4 & 5 extend a max of 35 ...
2
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1answer
100 views

E-2/C-2 left thumb control?

For some reason I ended up binge watching E-2s and C-2s doing shots and traps on YT. One thing caught my eye; especially during the approach, the pilot’s left thumb is in constant motion pressing a ...
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1answer
142 views

Does a RC glider always loop when launched?

In the below video, the guy sets "launch mode" for hand launch where he adds a little bit of elevator. Will a glider always loop up when launched horizontally, even if the tail is set to ...
3
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3answers
822 views

Can aileron differential eliminate adverse yaw?

Can aileron differential completely eliminate adverse yaw?
5
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1answer
598 views

How are the 737’s elevator and aileron cables attached to their control tabs without impeding the control surfaces’ motion under hydraulic power?

The 737 (all versions thereof) is one of the few jetliners still in production to have any manual-reversion capability for its flight controls in the event of the loss of all hydraulic systems. If ...
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2answers
241 views

Can Savannah be stalled with agressive yoke pull?

My friend fly ultra light Savannah, 2 seats plane,wings dont have slats ,it has vortex generators at leading edge. He says that he cant stall plane with agressive yoke pull (I talk about speeds above ...
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0answers
88 views

How do the A320 flight controls reconfiguration laws work?

Can someone explain in simple terms the reconfiguration laws? I have hard time understanding ELAC, SEC, FAC Priorities in FCTL Architecture Diagram.
0
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1answer
167 views

Do pilots typically mix roll/yaw when piloting various planes? [duplicate]

When flying on GeoFS, a popular flight simulator online, one of the default settings is to mix roll and yaw. Of course, it isn't real life, so I think it might differ from flying in the real world. Do ...
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1answer
218 views

Why does the pilot do this when taking off?

In the past (before the pandemic, of course), when riding commercial jets, I noticed that sometimes, the pilots would bank to port, then to starboard, and repeat that multiple times, while climbing ...
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2answers
235 views

What are the primary and secondary flight controls for the SEPECAT Jaguar?

What lift augmentation devices are used in the SEPECAT Jaguar? I couldn't find any information.
2
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1answer
170 views

Why don't airliners use light strips on physical controls (yoke/stick, throttle and trim) to indicate who has control - pilot or flight computer?

I've watched a lot of Air Disasters episodes about crashes where pilots thought auto-pilot, auto-throttle, auto-trim were "in control" but they weren't (or vice-versa) due to some innocuous ...

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