Linked Questions

2 votes
1 answer
1k views

Relationship between wing aspect ratio and speed [duplicate]

For some reason, I cannot find a relatively straightforward source online which discusses the relationship of wing aspect ratio and how it affects speeds of an aircraft. Specifically, is there a ...
sethkim's user avatar
  • 21
2 votes
1 answer
863 views

What is the aspect ratio of a wing? [duplicate]

I've been trying to get my head around wing design and have been following a few YouTube videos. When people talk about aspect ratio (AR) on a wing and give a value (Piper PA28 having an AR of 5.7) ...
user14660's user avatar
1 vote
1 answer
318 views

Is there a rule of thumb for aircraft design? [duplicate]

I'm wondering how to best scratch build an rc aircraft and what rough proportions the aircraft should be in. I'm aware of the fineness ratio that determines the width to length ratio of a cross ...
Krish's user avatar
  • 111
2 votes
0 answers
107 views

Relation between drag and aspect ratio [duplicate]

How does increasing the aspect ratio decrease the drag over the wings? Wouldn't the various types of drag affect over the wings in proportion to the increasing aspect ratio?
Kaustubh 's user avatar
0 votes
0 answers
49 views

Wing Shape: Long/Wide Span Wings vs Deep Wings [duplicate]

Planes use wings to generate lift. The wider the span of the wing (looking at the plane from the front) the more lift it generates, however, this is at the expense of more drag. Some planes like the ...
TheCatWhisperer's user avatar
24 votes
3 answers
6k views

Could airliners' wings be thinner if no fuel were stored in them?

I ask this question because wings are pretty thin overall, but I am curious if you could make them more thin.
Ethan's user avatar
  • 9,349
13 votes
2 answers
32k views

How does the raked wingtip of the Boeing 787 work?

The wing tips are very different on these airplanes. The wingtip on a Boeing 787 is a sharp triangle, while the wingtip on a Boeing 737-300 is flat. British Airways Boeing 787-8 G-ZBJC wingtip | by ...
Ethan's user avatar
  • 9,349
18 votes
2 answers
29k views

How does chord length affect wing design?

In comments on the answer to a question about transonic speeds and control surfaces I came across this comment and I'm having a hard time understanding it. If you increase the chord, lift goes up ...
Jae Carr's user avatar
  • 24.2k
10 votes
2 answers
3k views

How have engineers managed to increase commercial airliner wing aspect ratios over time?

Over time, the wing aspect ratios of commercial airliners have increased. For evidence ,see the following data: 1980s: Boeing 747-400: 7.91, Boeing 757-200: 8.0 Boeing 767-300: 8.0 Airbus A310: 8.8 ...
interested22's user avatar
11 votes
7 answers
3k views

Explained intuitively, why does aspect ratio affect induced drag?

Over the last few hours, I've been trying to intuitively understand induced drag, and how aspect ratio affects it. I already know the equations, but while they explain the relationship, they do not ...
Xelphonential's user avatar
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
  • 283
10 votes
4 answers
3k views

Why do we use dimensionless expressions in flight mechanics and aerodynamics?

Why do we use non-dimensional expressions in flight mechanics and aerodynamics? We could as well directly calculate forces and moments; would that not be more relevant to the specific problem?
SAMER BABIKIR's user avatar
12 votes
2 answers
4k views

What is the aerodynamic benefit of trailing edge sweep?

Sweep will allow flight at higher speed because the perpendicular air flow speed (over wing) is less. But why is there trailing edge sweep? We can have a swept leading edge and unswept trailing edge ...
Selva's user avatar
  • 741
4 votes
7 answers
1k views

Wouldn't a triplane be much more efficient than a monoplane of same wing area and span?

Note: not a duplicate of Can biplane or triplane designs be revived with modern materials? This question compares a high performance triplane with high aspect ratios and high gap, to a monoplane. It ...
Fred's user avatar
  • 1,507
6 votes
2 answers
4k views

Why is induced drag less on a high span wing?

I have a basic question and sorry if it is a well known fact. I understand that the induced drag is due to the tip vortices changing the effective angle of attack (downwash). I searched some ...
Selva's user avatar
  • 741

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