# Questions tagged [pitch]

Pitch is rotation about the lateral axis, which makes the nose point up or down.

77 questions
Filter by
Sorted by
Tagged with
118 views

### The relation between aerodynamic center and lift

On the internet, I found two separate definitions for the aerodynamic center. One was "the point where pitching moment is constant regardless of angle of attack" and the other was "the ...
• 41
86 views

### Does oscillation occur in the pitch axis of a plane?

If you a small GA plane, and apply full rudder to one side and then let go, there will be some oscillation from the momentum of the rotation about the yaw axis. Does this same effect happen with the ...
• 3,413
341 views

### Pitch of a glider with altitude

I'm designing a high-altitude glider. Just to clarify a few points before my question: The glider will weigh close to 200 grams. It will be using the A18 airfoil. The glider is dropped from 80,000 ...
1 vote
320 views

### A220 Direct Law Mode trim control

When A220's PFCCs are all failed, the airplane enters direct law mode. In this mode, from description, pilots should manually control stabilizer trim. When this situation occurs, does pilot need to ...
• 401
208 views

### A transfer function relating jet engine thrust to pitch angle during a phugoid motion

Crossposted on Mathematics SE I am doing a school project that requires me to find a transfer function that relates the thrust of a jet engine (which could change with time in one way or another) and ...
• 603
1 vote
380 views

### What is the maximum pitch achievable in a medium-powered airplane?

One of the answers to this question proposes a maneuver in which the plane is pointed almost vertically. Obviously, an aircraft with a high thrust-to-weight ratio can achieve this simply by climbing, ...
1 vote
201 views

### Pitch control in PX4 autopilot

I am trying to translate controller diagram of fixed wing px4 attitude control into mathematical form. While going through the controller diagram Fixed-Wing Attitude Controller looking into PX4 github ...
84 views

### How does the US space shuttle control pitch when landing without a canard? [duplicate]

Looking at the design of the US space shuttle, I'm curious to understand how it's able to control pitch during landing? By just looking at the design, it appears that it would need some kind of canard ...
• 109
2k views

### If the pitch of a bypass fan blade in a turbofan is fixed how does it manage to provide thrust over such a large speed range?

A fixed pitch propeller is only good for aircraft that do around 100kts because the angle of attack on the propeller decreases as the forward airspeed of the aircraft increases, limiting the thrust ...
• 111
316 views

### Sudden "nose-down" event during a normal flight in normal weather conditions

I had a flight scheduled from WAW to KIV on LOT airlines. The boarding pass told they changed the aircraft to a 737 MAX. When I saw that I've immediately remembered that whole MCAS story from 2018. ...
1 vote
298 views

### Where can a digital reading of the pitch/attitude of a plane be found?

Where can a digital reading of the pitch of plane be found? E.g on Microsoft flight simulator, on the attitude dial, the pitch of the plane (e.g 10 degrees up above horizon) has to be manually read ...
• 11
281 views

### How pitch is changed in harrier jet(vertical landing and take off aircraft)

How pitch is changed in harrier jet and lift is achieved?Is it same principle like conventional fighter jets like f16 etc? What about drones quadcopter etc do they also follow same principle?
• 163
250 views

### Do aircraft pitch down even at very low angles of attack (below 0°) in a strong sideslip?

I was doing an analysis of an aircraft (specifically the PZL Koliber 160 with the NACA 63A416) strong sideslip conditions (beta=30° for example) in OpenVSP at various angles of attack, and observed ...
• 1,404
168 views

### Adverse pitch on unstable aircraft's roll

In airplanes like the F-22, both the main wings and the tailerons provide (at least at subsonic speed) positive lift. My question is this: when performing a roll using all control surfaces ...
• 41
1k views

### What's the optimal zoom climb angle for a fighter jet to reach its highest possible altitude in a parabola?

If a supersonic fighter jet wanted to reach the highest possible apogee it could in a parabola, what's the optimal pitch angle to do so? A too high pitch may result in insufficient thrust and a sooner ...
• 193
440 views

### What do you call a fall that is due to too little engine power, not due to cessation of aerodynamic lift?

If you raise your plane's pitch but the engines can no longer counter the gravity and you begin to fall (because the engines are too weak, not because of too little lift), what do you call that? This ...
• 533
757 views

### What is propeller pitch speed?

I was using Ecalc to calculate some flight parameters and then I came across this term called "propeller pitch speed". Can anyone explain me what this means?
1k views

1 vote
1k views

### How attitude, speed, and altitude vary when increasing pitch?

I have been struggling with the following question for a while, would greatly appreciate some help and explanation why. Scenario: I'm cruising in my Cessna- cruise attitude 2300 RPM trimmed for 95. ...
• 853
4k views

### Why does pitching moment coefficient decrease with an increase in the angle of attack?

Slope of Cm vs alpha graph is negative, why it is so? The attached graph is from https://en.m.wikipedia.org/wiki/Pitching_moment , this graph is for cambered airfoil, as pitching moment is zero for ...
• 217
365 views

### What exactly is "plunge?"

I'm doing a project in which i'm attempting to model the motion of a wing using a system of second order differential equations. This is a 2-degree-of-freedom model based on the quantities pitch, a(t),...
1 vote
2k views

### Helicopter Flight: What is the reason for decrease in Induced drag with increase in speed?

As per the figure the induced drag will decrease only if the AoA of the blade is decreased — But in the forward flight, cyclic input increases and decreases the AoA throughout the blade rotation cycle....
• 268
1k views

### In helicopter's forward motion, how is the forward pitching moment taken care off?

When the rotor disk is in the position shown by the dashed lines, the net Lift is at an angle. It should produce a forward pitching moment about CG (Center of gravity). That can cause the helicopter ...
• 268
4k views

### How can I calculate the relationship between propeller pitch and thrust?

I am trying to design a WWI propeller so I started calculating. The propeller comes with a specified pitch of 1.75m. The engine is supposed to run at around 1900 rpm and 147kW. These are most likely ...
• 75
2k views

### How much torque can a Boeing 747 apply when pitching?

I know this is a weird way of thinking about / quantifying this, but I'm trying to figure out how much torque a 747 can apply to itself when it pitches upwards (turning about an axis from wing to wing,...
530 views

### What is the average pitch of a plane?

I'm looking for the average pitch of big planes like an Airbus A300. For horizontal travel, is the plane horizontal or does it have a pitch like 1 or 2° (or more)? If the plane does not accelerate ...
• 31
1k views

### What is the relation between velocity and rate of pitch?

I saw the answer to airspeed and rate of turn but this I think isn't what I want. I've seen it many times that aircraft will pitch up much slower when at higher speeds particularly fighter aircraft. ...
• 55
528 views

### How does a delta wing deal with supersonic boundary separation?

The question Why most of the supersonic or fighter aircraft use all-moving control surfaces? emphasis the importance of all moving stabilator for supersonic aircraft. Many supersonic aircrafts ...
• 16.5k
1 vote
2k views

### What 's the difference between Angle of Attack and Pitch? [duplicate]

I am interested in knowing the theoretical and practical differences between the Angle of Attack (AoA) and Pitch: Graphical definitions How are they related? In what circumstances these angles are ...
• 707
783 views

### Why does the use of reverse thrust on the DC-8 generate a pitch-up moment rather than a pitch-down moment?

Unlike most aircraft, the DC-8 is certified to use reverse thrust in flight (albeit only on its inboard engines). This serves as a very effective airbrake, although it also produces considerable ...
• 28.5k
6k views

### Why does the Eurofighter Typhoon pitch up on brake release?

In the video here of an airshow take-off, it's noticeable that when the brakes are released there's a brief but pronounced fluctuation in pitch as the aircraft accelerates. This is something you see ...
• 14.2k
1k views

### How does the load factor vary when the aircraft pitches up/down?

I know that when an aircraft starts rolling, it's load factor increases. But can anybody explain how does load factor vary when the aircraft pitches up/down? Does it increase/decrease?
• 1,753
347 views

### What is difference between pitch & lift? [closed]

What is the difference between pitch and lift of an aircraft?Please kindly try to include graphics with your answers
• 163
1 vote
198 views

### Partial panel power on stall under the hood

What do you use for control and performance instruments while demonstrating power on stall under the hood with attitude and heading indicator covered (No vacuum instruments in 6 packs ) ?
1k views

### Why does spoiler extension cause straight-wing Learjets to pitch down, rather than up, and why did it take so long to discover this?

Straight-wing Learjets (the 23, 24, 25, 35, and 36), the first generation of the popular business-jet series, are (especially when not equipped with any of the many first- and third-party wing ...
• 28.5k
1k views

### Do the speed brakes on an F-16 change its pitch?

In level flight at 400 knots, what happens when the speed brakes are extended?
• 2,109