Linked Questions

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0answers
68 views

Do winglets really improve efficiency and reduce drag? [duplicate]

Below are some pictures of various fixed wing aircraft with winglets. It is widely accepted that these winglets will improve an airplane's performance by reducing drag and therefore improving fuel ...
0
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0answers
34 views

Wings and winglets [duplicate]

Wouldn't a wider wing center section be a better solution than adding winglets? Say adding 5% to the span by increasing the size of the wing box and center section. Like they did when they built that ...
12
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2answers
5k views

Why does the Antonov AN-225 not have any winglets?

Winglets provide a lift boost that would be useful to a plane of this size. But the An-255 does not have any winglets. Why is it so?
29
votes
6answers
4k views

Would an 8% reduction in drag outweigh the weight addition from this custom CFD-tested winglet?

I'm writing an essay at school about why there is so much variation in winglet design. I am analysing all the primary types of winglets used today in the aviation industry. I'm constructing them in ...
22
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3answers
10k views

Why has the 777x been designed with folding wingtips?

I recently visited the Boeing factory outside Seattle, WA and noted in the distance a new 777x being built with, what looked like very large winglets. However, on closer inspection they're not - the ...
0
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0answers
539 views

Why don't more airplanes incorporate spiroid winglets? [duplicate]

In typical airplanes, lift induced drag can account for the majority of the overall drag. Why don't more aircraft employ methods to reduce this and specifically why not spiroid winglets? From every ...
3
votes
3answers
1k views

Aerodynamics of double winglets

I've read here on Aviation SE that the aerodynamics of winglets on an aircraft are easily described as "extending the airfoil". Thus, as I understand it, a winglet is like stretching the airfoil a ...
0
votes
0answers
349 views

Is the Embraer E190-E2 equipped with raked wingtips?

It looks like the Embraer E190-E2 has a raked wingtip, but isn't a raked wingtip only efficient for long-haul aircraft like the Boeing 77W?
5
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3answers
2k views

How is drag created from wingtip vortices?

What is the reason for the drag due to wingtip vortices? This question is about (general) performance, but doesn't answer the drag aspect.
15
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4answers
7k views

How high does the ground effect last?

Up to which height is the ground effect still significant enough to be taken into account? Would this height be sufficient to actually fly above the ground, overcoming at least trivial obstacles like ...
10
votes
2answers
684 views

What are the effects of adding winglets to an aircraft not designed with winglets originally?

Are there any positive advantages or catastrophic effects on adding winglets to an aircraft not designed with winglets originally?
1
vote
1answer
231 views

Would it be a benefit to install winglets on a Hawker 400XP?

Would it be a benefit to install winglets on a Hawker 400XP? If so how much would the performance be increased?
6
votes
2answers
1k views

Why does wake turbulence sink?

There has been a remarkable story this week of a Challenger 604 business jet being rolled after encountering the wake turbulence of an A380. A Challenger 604 at FL340 operating from Male-Abu Dhabi ...
2
votes
1answer
631 views

How can I calculate the effect of winglets on aircraft performance?

For a project at university I am having to produce a SIMULINK model of a Nimrod MR2 aircraft. The next step is to increase the endurance of aircraft and a possible route for this is adding winglets to ...
8
votes
1answer
895 views

Is induced drag not caused by tip vortices?

According to most online resources, including NASA, induced drag is caused by wingtip vortices which induce downwash. However, in StackExchange I have found a few answers (Peter's and Jan's) that ...

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