# Questions tagged [flight-controls]

The methods or mechanisms used to control an aircraft's movements in roll, pitch, and yaw.

17 questions with no upvoted or accepted answers
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### Does the MU-2 have a crossover airspeed?

Airplanes generally have a crossover airspeed (a minimum airspeed below which directional control of the airplane cannot be maintained in the event of a rudder hardover). This is because, as airspeed ...
485 views

### How to fly a parabolic arc?

The title says it all, how do you fly a parabolic arc? Me and my friend Ben, are starting a research lab. We want to learn how to fly a parabolic arc.
42 views

### Is there a general standard for servo actuators?

It is said in the standard AS94900 that the standard ARP490 should be considered for the actuators of the control surfaces in the aircraft. However, this standard is on servo valves and not servo ...
79 views

### How did the Caproni Ca.60 electrical communication system work?

On the wikipedia page for the Ca.60 it says: The two nacelles also housed a cockpit for one flight engineer each, who controlled the power output of the engines in response to the orders given by ...
69 views

### What failure modes did Airbus seek to eliminate or mitigate when they changed the design of the A310/A300-600's rudder travel limiter?

In the NTSB report on the crash of American Airlines Flight 587, it is mentioned (in the context of the changes between the A300-B2/B4's rudder system, on the one hand, and the A310/A300-600's rudder ...
369 views

### How do the actuator loads (e.g. for the ailerons) vary between different flight phases?

Assume the hinge moment is given as $HM = 0.5\rho v^2*C_{h\delta} \delta*S*c$ $\rho$ = air density $v$ = air speed $C_{h\delta}$ = Hinge moment coefficient $S$ = Control surface area $c$ = ...
125 views

### Ailerons deflection of the F16 in take off and landing gain?

Let's say you are at a safe altitude and landing gear is down and the aircraft is in To/L gains and you want to do aileron roll and apply full left (or right ) stick to do the rolling maneuver.The ...
78 views

### what are the no load rates of f-16 control surfaces?

What are the no-load rates for the control surfaces of f-16 like flaperon,leading edge flap and horizontal and vertical stabs?
42 views

### Does the SAS (stability augmentation system) actuators of f-14 use jet-pipe or flapper-nozzle technology?

F-14 uses electrohydraulic servo actuators for its SAS. What type of hydraulic amplification is used in F-14? jet-pipe, flapper-nozzle or something else?
55 views

### What factors should be considered to select jet-pipe or flapper-nozzle technology for a primary control surface?

How is the servovalve mechanism chosen between these two mechanisms? what are their advantages and drawbacks?
271 views

### Why does the KC-46 use an MCAS?

The KC-46 tanker aircraft (the U.S. military's designation for the 767s it uses as tankers, and which every other country calls the KC-767) uses an early version of an MCAS.1 This was ostensibly ...
79 views

### What is the selection algorithm in f-16 stick LVDT?

In a reference: https://www.nasa.gov/centers/dryden/pdf/88102main_H-1344.pdf page 67 (71 of pdf file) in Table 12, it is said that the signal selection algorithm from the redundant LVDT of stick in f-...
92 views

### Would throttle steering of a forward-swept-winged aircraft be possible?

Fortunately (or perhaps unfortunately, given the number of crashes that had to occur for us to figure it out), the use of throttle manipulation to control an airliner with disabled primary flight ...
40 views

### Effect of Rudder on Velocity Vector

Suppose we have an aircraft flying in steady, level flight at zero angle of attack. In this configuration, the velocity vector $\vec{V}$ is perfectly aligned with the $x$ axis. At some time $t=t_0$, ...
53 views

### What is the difference between the Flight Control Systems of different F16 models?

it is mentioned that the F16 A/B variants had an analog FCS, while the C/D version introduced a digital FCS starting from block 40. Can somebody elaborate on the differences between them and point me ...