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Questions tagged [canard]

Smaller surfaces placed near the front of an airplane which provide lift and control forces

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6 votes
2 answers
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How do canards reduce the X-59's sonic boom?

X-59 As of 2017, the ground noise was expected to be around 60 dB(A), about 1/1000 as loud as current supersonic aircraft. This was to be achieved by using a long, narrow airframe and canards to keep ...
Abdullah is not an Amalekite's user avatar
0 votes
1 answer
146 views

Aerodynamic center vs center of pressure for guided MLRS

How to define static margin of guided artillery rocket with canard-free rotating tail configuration? In the E. Fleeman book, the aerodynamic center ($X_{ac}$) was used: $ SM = {X_{ac}-X_{cg} \over d} $...
TVH1986 ct's user avatar
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0 answers
194 views

Why might a canard aircraft suddenly pitch down from a level flight?

I have a canard aircraft which has pitch stability issues that I'm trying to troubleshoot. The aircraft has a characteristic tendency to depart level flight in sudden dive/ or generate a massive nose-...
Mridul's user avatar
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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 ...
Travis's user avatar
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2 votes
3 answers
1k views

How are canards designed to stall before the main wing?

I understand that aircraft with canards are designed so that they pitch down when at a high angle of attack. The canard is designed to stall before the main wing, thus the canard produces no lift ...
Matthew Mair's user avatar
1 vote
1 answer
371 views

Why do most canards have swept wings?

So most canards have swept back wings. Now I have been told that it is that way to ensure yaw stability (for example in a crosswind) - not sure though. But then I look at the new Lilium jet, which is ...
Vincent Cerowski's user avatar
5 votes
2 answers
415 views

Why was the deep-stalled prototype Velocity unable to come out of the stall, even with a 20-30deg nose-down attitude?

Test pilot Carl Pascarell got himself into an interesting situation while testing the Velocity prototype. With an aft-CG, he got himself into such a deep stall that flight was unrecoverable. Amazingly,...
Kenn Sebesta's user avatar
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1 vote
1 answer
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how are the properties of canards affected when they are angled compared to normal canards?

So i recently saw an image of the natf-23 a modified(more like completely redesigned) yf-23 and one of the interesting things it had were canards that were angled. What would the benefits and drawback ...
Naj Litarvan's user avatar
1 vote
2 answers
187 views

Why can canard wings not be used in all sonic aircraft despite their high control?

As Canard serves two purposes; it improves aircraft control, also contributes to lift, replacing the horizontal stabilizer and - theoretically - reducing overall drag.
Ananya Singh's user avatar
6 votes
2 answers
2k views

Why are there no high wing Canard airplanes?

Just had a thought about canard airplanes while looking at the Tu-144 that features a canard surface on the top of its fuselage. Are there any high-wing aircraft with a top or bottom mounted canard? ...
Gerry's user avatar
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4 votes
2 answers
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Why were canards added to some variants of the Dassault Mirage III?

Mirage III offshoots like Kfir made by Israel Aircraft Industries: or Cheetah converted by South-African manufacturer Atlas Aviation: both have canards. The original Mirage III designed by French ...
user366312's user avatar
1 vote
0 answers
131 views

How do boxwing and tandem airplanes balance moment

I want to build a hydrofoil like this picture: I discovered that you can pump it with a leg motion and moving the center of mass. Like this: I discovered xflr5 and ...
x3oo's user avatar
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3 votes
2 answers
548 views

Why was building the Saab Viggen such an achievement of canard design?

In https://aviation.stackexchange.com/a/80365/20394, @GuyInchbald says "Nevertheless, getting the darn thing into production after 60 years of failure was a staggering achievement." What was ...
Kenn Sebesta's user avatar
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1 vote
1 answer
228 views

Identify odd aircraft near PWK 7/19/21

My workplace is under the pattern for Chicago Executive (PWK) and we sometimes get interesting/unusual things flying overhead. Yesterday I heard something that sounded very different from a "...
Crash Gordon's user avatar
1 vote
1 answer
359 views

Is there a better solution than the U-shaped tailplane for this Airbus concept?

Image source: airbus.com This U-Shaped tail is from a concept aircraft from Airbus, I was wondering if there is an alternative but just as good solution to the U-shaped tail. Using a canard in the ...
Sherlock Homies's user avatar
0 votes
0 answers
90 views

What characteristic my canard needs to have when the canard also carries a pair of engine?

I am in 3rd year Aerospace Engineering and trying to do a preliminary design of an airplane. My design has a front wing that also has an engine at its root on both side of the fuselage. There is ...
user39178's user avatar
  • 313
2 votes
2 answers
770 views

What makes wing strakes desirable?

Some planes have this large protruding part at the wing root. If my understanding is correct, it's a wing strake and it improves lift at high aoa via vortex induced lift on the rest of the wing. I ...
GZoltan's user avatar
  • 87
4 votes
3 answers
964 views

Why aren't 3-surface aircraft more popular in general aviation?

From everything I can gather, canards offer significant gains in performance characteristics, and most the drawbacks apply only if you remove the tail. Why not mix them together? What does Piaggio ...
Jason Summer's user avatar
8 votes
1 answer
4k views

Why does the Eurofighter Typhoon have a long arm canard versus the close coupled canard of the Dassault's Rafale or the JAS-39 Gripen?

The Rafale and the Gripen are quite similar but the Eurofighter Typhoon has the canards far forward. I've been told that this was due to the shape of the air intake. Apparently the Typhoon's air ...
O'Terror's user avatar
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2 votes
2 answers
470 views

What can be approach of balancing canard glider model?

There are a lot of instructions out there about balancing classic wing configuration glider models. The center of gravity should be approximately 25% to 30% from the front edge of the wing, which is ...
Alexander Ziubin's user avatar
4 votes
3 answers
3k views

What are the disadvantages of a Tail providing lift? (tandem-wings included)

Most aircraft feature the tailplane configuration, which requires the main wing to provide higher lift than the weight of the plane itself, what seems counterproductive. Few aircraft have featured ...
zaumo's user avatar
  • 55
3 votes
0 answers
876 views

First Boeing 757-200 N757A 'Catfish' was modified with a Canard foreplane. How did it behave?

The aircraft had these changes made around 2006 to act as an F-22 Avionics test bed. One would expect that the fore plane changed many performances of machine, including take off and landing attitude ...
Urquiola's user avatar
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4 votes
2 answers
810 views

Why is a canard configuration more Structurally efficient for Rutan's Voyager?

Firstly, I’d like to kindly request not to mark this question as a duplicate of previous SE question without first reading this, because the approach is different and the previously given answers are ...
user avatar
16 votes
4 answers
5k views

Why there so many pitch control surfaces on the Piaggio P180 Avanti?

Picture source. I have seen that there is kind of sonic aircraft like B-1B Lancer that used elevator and canard or fins at the same time for pitch control. That quite understandable because it is ...
AirCraft Lover's user avatar
12 votes
1 answer
3k views

Does the B-1B Lancer have controllable canards?

These three pictures shows the B-1B Lancer's canards and its elevators. I am not sure to call that feature a canard as the jet also has elevators. In my limited understanding, canard and elevator are ...
AirCraft Lover's user avatar
11 votes
1 answer
997 views

Why do some canard aircraft have dihedral on their canards?

For instance, Rutan's Solitaire and Steve Wright's Stagger-EZ. What are the benefits of having a dihedral on the canard? It seems like the canard dihedral increases yaw instability, and requires a ...
user avatar
5 votes
1 answer
648 views

What is the suggested position for a canard?

In a canard aircraft, what is the suggested position of the canard, with respect to the wing positioning? Considering the effect of down wash of the canard on the wing, what is the suggested position ...
Gaurav's user avatar
  • 103
4 votes
2 answers
5k views

Identify canard, low-wing, single pusher-prop plane over Upstate NY

Yesterday, August 11, at around 3:30 pm, I saw an unusual-looking plane flying over Ithaca, NY. It seemed fairly small -- approximately business jet sized. Unfortunately, I didn't have time to get a ...
pbfy0's user avatar
  • 143
2 votes
1 answer
2k views

Why didn’t the Concorde have flap-canards like the Tu-144?

One of only two ways of which I am aware in which the Tu-144 was “ahead” of the Concorde1 was in its use of retractable flap-canards, which increased the lift on the front of the aircraft at low ...
Vikki's user avatar
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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
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1 vote
0 answers
50 views

Is some sweep beneficial with taper?

I'm developing a canard glider which requires some taper for the canard to stall first. I understand that sweep is typically only for aircraft in a compressible airflow (M >= 0.3), but is there any ...
jbrinx's user avatar
  • 11
4 votes
1 answer
386 views

Are canards useful for ultra low flying aircraft?

In this question about canards, they are described as being useful mostly/only for supersonic configurations which are unstable at regular? speeds. But for a low power, ground hugging aircraft, ...
Patrick Zissou's user avatar
2 votes
1 answer
1k views

Does it make sense to use a canard in combination with a conventional aft elevator control surface?

I am designing a UAV and have settled on a canard design. However, I’m curious whether it would be helpful to have a typical horizontal stabilizer behind the wing as well as a canard wing in front of ...
Tristan Semmelhack's user avatar
0 votes
2 answers
499 views

Why does the Rutan Voyager use canards? [closed]

Can anyone point me to why Burt Rutan's Voyager is a canard? In other words, what reasoning could be behind it. What problems Burt Rutan might have tried to solve by using Canard configuration in ...
Jujubs's user avatar
  • 11
1 vote
1 answer
2k views

Why are "canard" not used on commercial aircraft? [duplicate]

As of today and as far as I know, there is no commercial aircraft with canard, while they are used on several military aircrafts (like Rafale, Typhoon). Plus, during take off the empennage pushing ...
le_daim's user avatar
  • 400
-2 votes
1 answer
336 views

Why do we use the length of the canard as 1/3 of the wing?

Twisted canard is our project, so we are designing and analysing the model. We compare the twisted canard with an untwisted canard to find the best among them. The problem is we designed a canard of ...
Mahendra's user avatar
17 votes
2 answers
4k views

Why aren't the canards used as airbrakes on the Tupolev Tu-144?

The Tupolev TU-144 uses retractable canards to stabilize the aircraft while starting and landing. On this picture you can see them very well: Source: AirlineFan.com Copyright: VOLPATI It doesn't ...
Spypsyduck's user avatar
8 votes
3 answers
2k views

Is the Suntoucher CG too far aft?

I acknowledge my very limited understanding of flight mechanics, but at first sight something tells me that the CG of the Suntoucher solar aircraft concept lies too far before the main wing and the ...
menjaraz's user avatar
  • 2,435
8 votes
1 answer
2k views

How do canard flaps work?

Before examining this XB-70 picture Wikipedia XB-70 photo I thought that all canard were one single flight control surface (as seen on many fighters such as the Eurofighter Typhoon), and that there ...
Manu H's user avatar
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5 votes
1 answer
1k views

Who invented the canard wing?

Who invented the canard wing? I know that early planes like those built by Santos Dumont and the Voisin brothers used canard wings but who invented the canard wing? Update The plane built by Hiram ...
Robert Werner's user avatar
0 votes
0 answers
204 views

How can the canard configuration increase the aircraft's maneuverability? [duplicate]

I know that in many of the fighter jets, there are canard configurations like in F16, SAAB Gripen etc and heard they increase the aircraft's maneuverability. Can anyone explains how a canard helps in ...
NitinG's user avatar
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10 votes
2 answers
3k views

why are there no production canard GA aircraft?

You see a lot of experimental canard GA aircraft, and their performance characteristics seem great. Why don't we see any production canard designs? EDIT For clarification. I'm asking about small ...
Arel's user avatar
  • 1,290
16 votes
4 answers
12k views

What is a canard?

While browsing this Stack Exchange, I regularly come across mentions of canards. I am not familiar with this term, and Google only gives information about ducks when I search for "canard". So, what is ...
Nzall's user avatar
  • 892
20 votes
3 answers
11k views

Why is the Tu-144 the only commercial airplane with canard configuration?

I understand the delta wing was chosen because of the supersonic cruise (like the Concorde), and canards were added to reduce the approach/landing speed. But canards may be used without delta wing (e....
Manu H's user avatar
  • 16.5k
23 votes
3 answers
7k views

Why is the use of tail-down force so common?

Why is the use of tail-down force so prevalent in aircraft design? Why not use canards to avoid induced drag?
sioux86's user avatar
  • 333