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Questions tagged [delta-wing]

A wing layout with triangular shape

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2 answers
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What wing design provided the best energy retention for a fighter jet

As far as I know, tailless delta wings have the worse energy retention during a turn, is that true? If yes then why is that the case? Also jets like F16 with root extended shallow delta wings (40% ...
Samrat Dutta's user avatar
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0 answers
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Why arrow wings are more efficient than delta wings?

From page 29 of this slide (https://archive.aoe.vt.edu/mason/Mason_f/SupersonicPres.pdf), an arrow wing has higher lift slope and lower induced drag slope than a delta wing with a straight trailing ...
SOAR1123's user avatar
2 votes
1 answer
386 views

Why cut off the tips of a delta wing to form a cropped delta?

According to wikipedia, the reason to cut off the tips of a standard delta wing is maintain lift outboard and reduce wingtip flow separation (stalling) at high angles of attack This type of delta ...
Frank's user avatar
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2 answers
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Why does the leading edge vortex accelerate the flow downward?

I know leading edge vortices over delta wings make more lift. I understood that the core of the vortex sheet is low, so there is suction flow that makes lift. But, I can't understand how a leading ...
Kim's user avatar
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1 vote
2 answers
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Is flow attached in the center of delta wing?

Is flow attached in center of delta wing or only on the edge where two vortices operate? Any video of delta wing vs AoA with smoke?
22flower's user avatar
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2 votes
2 answers
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How do I calculate where a wing is most likely to break?

I want to make a delta wing out of carbon fiber, but I do not know how many carbon fiber layers would be needed to prevent the wing from breaking due to shear stress. What would be the calculations ...
Moocow22's user avatar
11 votes
1 answer
1k views

Why are vortices produced at wingtips a source of drag, while vortices from the leading edge (harnessed by delta wings) good?

From my understanding, wingtip vortices produce a downward force on the aircraft, effectively increasing drag. Meanwhile, when considering leading-edge vortices on delta wings, we only consider the ...
Rory McDonald's user avatar
2 votes
2 answers
199 views

Why do semitailless swept-winged aircraft, but not delta-winged aircraft, suffer from (primarily) pitch oscillations at high mach?

Semitailless1 swept-wing aircraft without active stability enhancement2 generally3 have extremely poor handling characteristics, most notably a tendency towards violent pitch oscillations at high ...
Vikki's user avatar
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1 vote
2 answers
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Why are there so few carrier capable delta wing aircraft?

When looking through various carrier aircraft, I noticed that there seemed to be very few with delta wings. While initially chalking this up to higher stall speeds necessitating higher approach speeds ...
G01's user avatar
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7 votes
3 answers
1k views

What are the disadvantages of fitting underwing flaps to a Mirage III/5 fighter jets to lower landing speeds?

The Mirage III / 5 series of fighter aircraft are versatile aircraft, but has a high approach speed of 180 knots and a high landing speed, requiring long runways. Underwing flaps, like those of the ...
stackex555's user avatar
-2 votes
1 answer
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How does the wing planform shape help to operate the aircraft from subsonic to supersonic speeds?

Consider a compound delta wing aircraft with design cruise Mach number of 2: Explain how the wing planform shape helps to operate the aircraft from subsonic to supersonic speeds
Mahen's user avatar
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6 votes
1 answer
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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 ...
Manu H's user avatar
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6 votes
1 answer
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Why do UCAV/UAV designs mostly use lambda wings instead of pure delta wings?

Why do recent UCAV/UAV designs mostly use lambda wings (such as Taranis and Dassault nEUROn) instead of pure delta/diamond wings (such as X-47A Pegasus and Lockheed D-21)? As for stealth ...
user45344's user avatar
3 votes
5 answers
914 views

Can thrust vectoring be used to enable the use of flaps on tailless delta-winged aircraft?

I'm considering flying wings as well as airplanes with only vertical stabilizer for their compact size, efficiency and high speed. As I can't find a working example of such scheme, theoretical ...
Anbu Agarwal's user avatar
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2 answers
376 views

What will be the performance penalties of increasing the wing area of a delta winged aircraft to obtain a lower approach speed?

Delta winged aircraft such as the Dassault Mirage III have an approach speed of 170 knots as specified by the manufacturer. The Mirage F1 was designed to have a lower take off and landing speed than ...
stackex555's user avatar
17 votes
3 answers
6k views

Why does the F-15 have a swept-back trailing edge at its wing tips?

The F-15's wing has an curious feature: a swept-back trailing edge near the wingtips, along with an unswept inboard portion of the wing. (Modified from https://en.wikipedia.org/wiki/...
built1n's user avatar
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3 votes
2 answers
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For slow-flying ultralights, how would a delta wing compare to a biplane layout of equal wing area?

Context: By "slow-flying" I refer to ultralights that can be classed as "motorfloaters" - similar wing loading to a hang-glider, stall speed below 40km/h, cruise speed not much above. I'm interested ...
Thomas Bullock's user avatar
3 votes
1 answer
512 views

What would be the power requirements and performance of a Scroggs-type delta-wing aircraft with a 250 cm span?

Roy Scroggs, a tailor, patented in 1917, US1250033, and in 1932 US1848578, a Delta Wing plan form machine 'Flying Dart', flight tested with an OX-5 engine, they say ...
Urquiola's user avatar
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1 answer
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Why is the delta wing naturally stable in pitch?

Any thoughts on why the delta wings are naturally more stable in pitch, so they don't require any tail surface? What's the physics behind this?
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3 votes
2 answers
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What is a "slender delta" wing?

I am curious about delta wings. I read some articles and found the term "slender delta". Please help me to understand this term.
Mahendra_Gehlot's user avatar
2 votes
2 answers
1k views

Would the Concorde have been better off using a tailed delta wing?

In one of the answers to this question about the Concorde's lack of high-lift devices on its wings, it was pointed out that the Concorde, using a tailless delta wing, wouldn't have been able to use ...
Vikki's user avatar
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-1 votes
1 answer
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What is the flap adjustment angle for delta wing Aircraft for take off?

What is the flap adjustment angle for delta wing aircraft for take off for the Concorde and the SR-71 Blackbird, given that it has no horizontal stabilisers and that it used elevons?
securitydude5's user avatar
4 votes
2 answers
424 views

Does wing sweep affect the direction of lift?

Given both a straight and swept wing (identical otherwise), exposed to the same airflow, would the direction of lift be the same? Please see below a crudely drawn example of my thinking. Additionally,...
TheFlyingFisherman's user avatar
11 votes
2 answers
2k views

Why do delta wings generate less lift at a particular angle of attack compared to straight wings?

I simulated a delta wing and a straight wing in xflr5 with the same profile, wing area and airspeed (very low airspeed. around 10 m/s. it's for a model aircraft). The straight wing was operating at ...
Sherlock_Dumbledore's user avatar
6 votes
3 answers
2k views

How is the centre of lift and centre of gravity misalignment problem solved in Delta wing aircraft?

Since Delta winged aircraft don't have horizontal stabilizers to produce down force, how is that problem solved ?
Arth Patel's user avatar
1 vote
0 answers
93 views

Where are elevators located in aircraft with delta wings? [duplicate]

Where were elevators located in aircraft with delta wings, notably the Concorde and the Blackbird SR-71? If they didn't exist, how did these aircraft perform the nose up maneuver mid-air and at take ...
securitydude5's user avatar
1 vote
0 answers
51 views

What are the effects of angle of attack on turbines in composed delta wings with jets in upper side?

: a layperson doubt. What would happen during take-off and landing of a machine as Boeing X-48, because of the high angle of attack, the steep attitude of the airplane: would this difficult air supply ...
Urquiola's user avatar
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1 vote
2 answers
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Why has the rest of the world gone after delta wings while not the USA?

JAS Gripen, Eurofighter, HAL Tejas, Mirages, all are delta winged fighter jets. We don't see any delta-winged fighter jets in the US inventory. Why is that difference?
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17 votes
4 answers
6k views

Why did the Avro Vulcan use a delta wing?

Why did the Avro Vulcan use a delta wing? The B52, from the same era, used a swept wing, and had a higher maximum speed. In the answer to What are the advantages and disadvantages of a delta wing ...
Crosbie's user avatar
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9 votes
2 answers
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Why did the Beechcraft Starship use a delta wing?

From what i've seen delta wings are more appropriate to supersonic designs, and have poor lift/drag ratios at subsonic speeds. The Starship had a cruise speed of 300 kn, so what was the reasoning ...
Southbob's user avatar
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19 votes
2 answers
17k views

Why do all new European fighter jets have delta wings?

Why do all new European fighter jets - Typhoon, Gripen, Rafale have delta wings? As I know, they were all designed separately. And they are not new either. Is there any particular advantage that ...
user3624251's user avatar
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5 votes
1 answer
2k views

Does skin friction drag decrease with velocity?

The wings of subsonic planes have usually a very low surface area and aspect ratio as big as possible. However, in supersonic aircraft, wings with more wetted area (e.g delta wings) are used. Is this ...
user15037's user avatar
5 votes
3 answers
2k views

Does tailless means no tail at all?

When I was reading about the HAL Tejas I observed that it was described as a "tailless" plane. However I could see a tail in the picture. After careful reading I am assuming that being tailless means ...
Narayanan's user avatar
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13 votes
2 answers
74k views

What are the advantages and disadvantages of a delta wing compared to a swept wing?

What advantage does a delta wing have over a swept wing with high AR for supersonic flight? And what disadvantage does a delta wing have over a swept wing with high AR for transonic flight? The ...
tzy's user avatar
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8 votes
1 answer
7k views

Why does the F-22's wing give it such great maneuverability?

An F-22's wing is much different than a wing like the one on the F-16. This an F-16 wing design: (Source: www.aviastar.org). This is an F-22 wing: (Source: s3.zetaboards.com) There is a ...
Ethan's user avatar
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