Questions tagged [airplane]

A heavier-than-air fixed-wing aircraft propelled by one or more engines.

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1
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1answer
42 views

Can an airfoil have multiple aerodynamic centers?

Aerodynamic center is a point where the moment is independent of angle of attack. Can we have 2 or more such points? Does it necessarily lie inside the airfoil?
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4answers
154 views

Will it be more efficient if airplanes flap like birds? [duplicate]

Many airplanes have parts that are designed to mimic some features of animals. I have also read that birds are incredibly more efficient than most of the airplanes we see today. I wonder, will the ...
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1answer
2k views

How does an airliner adjust and move exactly over the coloured lines before stopping in front of the jetways?

How does an airliner adjust and move exactly over the coloured lines before stopping in front of the jetways?
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1answer
84 views

what is the actual force causes this issue according to IAS that shows normal descend speed?

When we have tail wind during approach , with respect of Aerodynamic forces that effect on airplane , the whole part of fuselage move forward due to tailwind, also we have about 70kts IAS (in general ...
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1answer
192 views

What would happen if a hot air ballooon was punctured in mid-air?

I am writing a script for a film where a hot air balloon is punctured and it falls to the ground. There are two teenagers in the balloon when it is in the air. What I would like to know is how fast ...
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2answers
381 views

Aircraft fuselages being shipped on a boat

Earlier this morning, my wife and I were down by the docks in Southampton (UK), watching cruise-liners move about with our binoculars. Whilst panning around, we noticed two old aircraft bodies (/...
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1answer
48 views

What does induced flow exactly means on helicopters flight? How is it different from downward deflection of air?

I believe all airfoils deflect air downwards at an angle at a velocity V. What is the difference between the downward-vertical component of the deflected wind and the induced velocity in Helicopter ...
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1answer
48 views

What are some first-order drag approximations for airframe/propwash interactions?

What are some first-order drag approximations for airframe/propwash interactions, both for dynamic flight and for static thrust, in a traditional tractor configuration?
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2answers
280 views

How to compute thrust to weight ratio of a Cessna 172?

Cessna 172 has weight about 1 ton and it's engine produces about 213 Kg of thrust, and it flies great. So if I make a plane with a weight of 100kg including pilot and fuel so will 15 kg thrust good ...
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1answer
64 views

Best books for learning about history of airplanes? [closed]

I've always liked airplanes, but for some reason have never retained much information about specific planes. For instance, if someone casually mentions the X-15 or the X-24, I have to look up what ...
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1answer
135 views

How do you spot the difference between an A320 and a B737? [duplicate]

I'm constantly having problems with identifying aircraft, and was wondering whether there are any tricks with easily identifying whether an aircraft was a Boeing 737 or Airbus A320?
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4answers
157 views

how does the rudder work? [closed]

What do you know about yaw control and more precisely about the result caused by the rudder (R on picture)? Below the right pedal of the airplane has been depressed, and the rudder creates a rotation ...
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3answers
164 views

Why do the ratio of proppeler plane over jet engine seems to have change in Bucarest airport during the covid19 crisis?

I live in a village very close to an (intl) airport: Bucharest "Henri Coanda" International Airport. Now, due to lock-down caused by covid pandemic, I noticed - at least today when I spent most of the ...
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2answers
673 views

Why do autogyros exist? [duplicate]

This question has been intriguing me for some time. In Autogyro the rotary blades merely acts as what fixed wings act in normal aircrafts to generate lift. So why not simply have a fixed wing instead ...
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0answers
29 views

what is the différence between sharklet and winglet? [duplicate]

I see that airbus mostly have sharklet,contrary to boeing which have winglet. What is the difference apparent?what is the aerodynamic differences?which is better? Edit:question duplicate ,sorry i ...
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2answers
153 views

How to increase payload capacity of plane?

Keeping thrust, wing span, weight (of plane) constant, can we increase the payload capacity (nearly 50% more)? Adding payload to plane, it decreases thrust/weight ratio, how does it affect the control ...
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5answers
192 views

Can lift be increased by increasing the angle of incidence of the wing? [closed]

Can the lift of a plane be increased by increasing the Angle of Incidence (angle between the chord line of the main wing and the axis of the fuselage)? Meaning, can more lift be generated while the ...
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1answer
329 views

Helicopter or Airplane, which is the most difficult to fly? [duplicate]

I know it varies from aircraft to aircraft, but I want to know in general, which would be the most difficult aircraft to fly even after years of experience. Helicopter or Airplane ? I tried to fly a ...
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5answers
378 views

Can you fly 2000 miles on an engine that costs less than $500k? If so, what type of engine?

Ok so Im exploring ways to bring cargo and medical supplies to various rural cities in say Africa without relying on ground infrastructure. Just short and cheap runways spread around the continent. It ...
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0answers
95 views

What plane has the widest range in speed in which it can operate? [duplicate]

What propellor plane, other than planes with vertical takeoff capability, has the largest gap in speed between its slowest stall speed and its maximum airspeed? I am looking for a plane with a short ...
16
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5answers
6k views

How do planes maintain constant speeds at cruise altitudes?

I'm a noob so pardon my ignorance. So my understanding is that as the plane gets lighter during the flight, its mass reduces therefore reducing the lift needed to maintain the altitude. At those ...
2
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1answer
116 views

How to manage anxiety just before flying? [closed]

I am new to aviation and flying. I have a one hour trip that is making me anxious and sleepless. How can I manage the fear and is it safe or just like the news we hear on news?
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2answers
3k views

Why are the angle-of-attack sensors on most airplanes mounted on the forward fuselage rather than at the wing roots?

A source of reliable angle-of-attack information is important for airplanes, as flight at an excessively-high angle of attack can cause the airplane to stall, which is generally considered to be an ...
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3answers
6k views

Why do non-aerobatic aircraft have a negative G limit?

Why do airplane wings have limit load of both positive and negative g's (e.g., the Weedhopper ultralight has a load factor of +5 and -2gs). Why not just have a positive limit load since most airplanes ...
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2answers
348 views

What is the type of the seaplane at the end of runway 18L on Schiphol Airport?

From 47 to 52 seconds into this video we can see a seaplane parked in a small pool of water. What type of plane is this and when did the plane fly for the last time?
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1answer
272 views

A commercial jet with rear tail-mounted engines and 3+3 seat pattern?

I have just spotted a cameo in one of the old CSI:NY episodes. External shot showed a commercial jet, rather big aircraft, with rear tail-mounted engines. While internal shots shown 3+3 seat rows ...
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3answers
148 views

Trying to identify large WWII aircraft by aileron position on rudder

So I have this artifact, a man's slide-on tie clip with the figure of a large, overwing, possibly four engine aircraft, with possible pontoons. Any idea what this baby is? It looks like a Pan Am ...
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1answer
121 views

Do commercial passenger airplanes have cambered airfoils?

It seems to me that they logically would, since they have no need to fly upside down like an aerobatic plane would (so they would not need a symmetric airfoil for any conceivable reason). That being ...
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4answers
577 views

Is it possible to hack an airplane while it's moving (in general)?

I recently searching Airbus Careers section, and I can say that I saw too many Cyber Security job positions. It was saying in the job description that there is a need of having knowledge about ...
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1answer
405 views

Is the term “small” applied differently between piston engine planes and jet engine planes? [closed]

My understanding was that "small" covered planes up to 12,500 pounds, no matter the engine type. Would that be gross weight/max takeoff weight? Brought to mind by the two recent Cessna Citation ...
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2answers
148 views

Can the back tail of an airplane move the neutral point backwards?

I'm currently in the process of designing a prototype aircraft and since I don't have very much experience with this I have the following question: I know that the center of gravity of an airplane ...
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3answers
2k views

Why are general aviation planes so expensive? [duplicate]

My question simply is why are GA planes so expensive? I can understand that an airliner is an incredible money sink simple because of the size, complexity, development cost and especially the ...
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1answer
116 views

When Airplane is reducing altitude from flight level (cruise), which one is more efficient

When an airplane is reducing altitude, say due to preparation for landing, the nose is tilted down. That I got from a video on Youtube which explains the way an airplane is going down until it reaches ...
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1answer
293 views

What makes Airplane Fly? Does Bernoulli Principle still Reliable? [duplicate]

Even the earliest airplanes did not apply Bernoulli principle. The wings were flat, and it worked. An honest engineer admitted that 'take off' is a mystery. Is there alternatives for Bernoulli ...
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5answers
4k views

Why does airflow separate from the wing during stall?

What causes the airflow separation from the airplane wing, that triggers a stall? To be more precise, what is the detailed explanation of the physics for why flow separation occurs at certain speeds ...
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2answers
172 views

Lights at the end of both wings of any airplane [duplicate]

Can anyone please explain to me why there is one green light at the end of wing and on the other side there is red light? what is the purpose of it and why it uses different colors like red and green ...
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1answer
424 views

Lift distribution on biplanes

This Wikipedia page about biplanes says in a wing of aspect ratio 6, and a wing separation distance of one chord length, the biplane configuration will only produce about 20 percent more lift than ...
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3answers
231 views

Is this video real? [duplicate]

I saw this video and wondered is this real. https://we.tl/t-BAukJQlHeG?src=dnl (Please open link and download video
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1answer
103 views

What is the effect of aileron deflection on the centre of pressure?

Deflecting an aileron will increase or decrease the camber of the outer wing where the aileron is attached. I learnt on this platform that centre of pressure (c.p.) moves fore and aft with aileron ...
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5answers
1k views

Is it legal to make emergency landing on roads?

Recently I've seen many videos of planes landing on car road. Is this legal? Does this only apply to only USA or even other countries?
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1answer
3k views

Why does the Antonov 225 needs 6 crew members?

Why does the Antonov 225 need 6 flight deck crew? What are they called and what do they do?
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10answers
13k views

Is it possible to fly backward if you have really strong headwind?

Is it possible to fly a plane backwards if you have a really really strong headwind? I mean when you are aloft, you have positive airspeed and airflow over the wings but you have negative ground speed....
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5answers
576 views

Could a helicopter fly like a plane this way?

Could a wing be added to a helicopter to allow the entire craft to tip 90 degrees forward allowing it to fly faster like a plane using a fixed wing and leaning into the wing for lift? I understand ...
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1answer
203 views

Why can’t electric motors be used in aviation [duplicate]

Why can’t electric motors be used in aviation? Is it a problem with batteries, torque, or what? From what I’m aware motors at high torque are expensive and need a massive footprint, than a high rpm ...
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4answers
2k views

What is the backup for a glass cockpit, if a plane loses power to the displays/controls?

I'm assuming there is still power to the rest of the plane - maybe it's an unrealistic scenario.
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1answer
165 views

Can I carry a waveform generator with me inside an airplane? [closed]

I have recently learned that I have an urgent domestic flight tonight. I am curious about whether I can carry the device with me. The device I want to carry is 33120A Arbitrary Waveform Generator. I ...
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1answer
95 views

Mnemonics to distinguish popular airplane models [closed]

When in the airport I'd love to be able to distinguish most popular aircraft from each other, how can I say that a plane I am looking at is say a320 or 737 etc? They look so similar. I can detect 747 ...
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1answer
323 views

What is this aviation quote?

I remember hearing a quote about aviation that was something along the lines of “asking a pilot why he loves flight is like asking an artist (or a painter?).....”. For the life of me, I cannot ...
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2answers
434 views

Are there any airplanes with the Centre of Gravity behind the Centre of Pressure? [duplicate]

We are used to seeing a forward CG in all airplanes, from a small Cessna to a large Boeing. I wonder whether any airplane with CG behind wing CP exists in production? Is it even possible? If so, what ...
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2answers
206 views

Positions of drag wires in a bay

Take a good look at the small dots • on the bays of this two spar wing. My question is: Are the drag and anti drag wire as seen in bay 1 supposed to connect to the root of the compression tube Or ...