Linked Questions

6 votes
3 answers
7k views

What is the function of the tail section on a fixed-wing aircraft? [duplicate]

In a generic fixed-wing aircraft like a Cessna, what is the function of the tail section, i.e. the rudder and elevators?
aeroaks's user avatar
  • 61
0 votes
0 answers
339 views

How does a horizontal tailplane stabilize a cambered airfoil aircraft? [duplicate]

The picture below shows the location and movement of centre of pressure when angle of attack is increased. Consider the aircraft is trimmed at the second airfoil in the picture. Thus the horizontal ...
Sherlock_Dumbledore's user avatar
21 votes
8 answers
8k views

Why do airplanes usually pitch nose-down in a stall?

Why do airplanes usually pitch nose-down in a fully-developed stall? I've seen this seemingly-simple question discussed on other aviation forums, but there doesn't seem to be a single agreed-upon ...
Ethan B's user avatar
  • 659
31 votes
4 answers
38k views

How do conventional and T-tails differ?

What design considerations go into the decision between conventional tails and T-tails? Functionally the horizontal stabilizer/stabilator are the same in both cases, providing negative lift, the ...
casey's user avatar
  • 35.2k
17 votes
3 answers
36k views

Are there advantages when operating with CG near forward or aft limits?

If the center of gravity of an airplane is too far aft, it will become more unstable Iif the CG is too far forward, then drag will increase due to increased angle of attack. But what are the ...
maimou's user avatar
  • 1,184
10 votes
4 answers
3k views

Do all aircraft need to have horizontal and vertical stabilizers?

Are (or were) there any operational aircraft that don't have horizontal and vertical stabilizers or canards? If so, what's the effect on how they fly?
anonymous's user avatar
  • 3,564
8 votes
5 answers
3k views

Can a plane with 2 sets of shorter wings fly?

I am proposing a plane that has 2 short wings of the same size on either side of the fuselage (two in the front and two in the back). Rather than using the horizontal stabilizer to destroy lift, the ...
Ewen W.'s user avatar
  • 661
10 votes
2 answers
2k views

How exactly do the Beechcraft 1900's stabilons work?

The Beechcraft 1900, in addition to the usual wings and vertical and horizontal stabilizers, and the extra vertical tail surfaces added for improved directional stability, has a pair of horizontal ...
Vikki's user avatar
  • 28.3k
6 votes
3 answers
16k views

Should the pitching moment be up or down?

I had a question regarding the direction of the pitching moment. To make sure we are on the same page, here is what I know so far (please correct me if I am wrong). Lift acts through center of ...
T-REX's user avatar
  • 63
6 votes
7 answers
1k views

Why do most commercial aircraft have the Center of Gravity before the Aerodynamic Center?

I've looked at the other questions concerning this topic, such as: How does an aircraft tailplane work? Does static longitudinal stability require download on the tail? But I'm still confused about ...
ROIMaison's user avatar
  • 7,157
5 votes
1 answer
16k views

Where is the best center of gravity?

I'm designing a plane, and I have a question. What is the best place for the center of gravity, relative to the center of lift? I've heard that it's best put just behind the center of lift, but I ...
Nicholas's user avatar
  • 668
6 votes
3 answers
2k views

Why aren’t there any lifting-canard airliners?

A lifting-canard aircraft, such as the Long-EZ, is an aircraft with the main wing at the back end of the fuselage and a pair of small, highly-loaded canards attached to the forward fuselage; the ...
Vikki's user avatar
  • 28.3k
6 votes
4 answers
1k views

How does a tailplane provide downforce if it has the same AoA as the main wing?

If an airplane is traveling through a uniform environment and its main wing is parallel to its horizontal stabilizer, how does its tailplane generate downforce? Only explanation I can think of is ...
Kozakov's user avatar
  • 467
9 votes
1 answer
2k views

Are there any fly-by-wire airliners with negative or near-neutral pitch stability?

Are any modern commercial airliners with fly-by-wire flight control systems designed with negative or near-neutral pitch stability so that they can take advantage of the capability of such systems to ...
Charles Bretana's user avatar
7 votes
2 answers
2k views

Why does aircraft stability increase when it transitions from subsonic to supersonic flight?

I am puzzled why would the aircraft be more stable at high speed flight at high altitudes. Given that the Centre or Pressure moves gradually towards the 50% MAC region, once past Mcrit. Has this got ...
shogunnyan's user avatar

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