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Questions tagged [airplane]

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

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8
votes
2answers
224 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?
5
votes
1answer
201 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 ...
1
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3answers
136 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 ...
2
votes
1answer
104 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 ...
3
votes
3answers
439 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 ...
4
votes
1answer
401 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 ...
1
vote
1answer
52 views

Can the back tail of an airplane move the center oft lift 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 ...
5
votes
3answers
349 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 ...
1
vote
1answer
101 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 ...
-9
votes
1answer
246 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 ...
24
votes
5answers
3k 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 ...
-1
votes
2answers
155 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 ...
7
votes
1answer
179 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 ...
-6
votes
3answers
212 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
1
vote
1answer
83 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 ...
7
votes
5answers
734 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?
22
votes
1answer
2k 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?
42
votes
10answers
12k 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....
0
votes
5answers
526 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 ...
2
votes
1answer
120 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 ...
7
votes
4answers
1k 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.
-1
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1answer
158 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 ...
1
vote
1answer
92 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 ...
2
votes
1answer
146 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 ...
1
vote
2answers
239 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 ...
5
votes
2answers
165 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 ...
0
votes
1answer
441 views

Does the SyberJet SJ30 really exist?

It is amazing to think about a single-pilot jet with that much range. They have a site, they have some 2 minute videos talking about the aircraft... but there is no video of the thing flying or any ...
0
votes
1answer
166 views

What do I need to get my pilot license? [closed]

I am thinking of getting my pilot license, I would love to fly a helicopter or a small plane, but I don't know where to start. What do I need to get a pilot's license? Things like: How much does it ...
1
vote
4answers
349 views

How is vertical speed managed in Airliners? [duplicate]

When an Airplane starts to take off, the Horizontal velocity would generate it the necessary lift, and then Airplane pitches up to further increase the lift. As the Airplane is climbing up, the net ...
1
vote
2answers
446 views

What are (wing area)/(weight) ratio in birds and airplanes? [closed]

I like to know the usual ratio of wing area over weight in birds and airplanes? I mean if total weight of an airplane is 100 Lbs(Kg), how much should be the least ...
1
vote
2answers
149 views

Forces that wing attach fittings must transfer to fuselage?

I just saw the naked wing (it didn't have its wing fabric) of a Weedhopper ultralight and wondered the types of forces that the wing lift struts must transfer to the fuselage, apart from the apparent ...
2
votes
1answer
164 views

Does the wing to fuselage fittings of an airplane ever experience shear load?

Do wing attach fittings of semi-cantilevered plane (i.e. ultralights) ever get subjected to shear force? For example during roll, does the centrifugal force of the wings load the wing attach fittings ...
0
votes
3answers
538 views

What makes an airplane STOL?

I watch STOL pilot champs Zenith CH701 here. The engine power are: 130 HP, 80 HP, 120 HP and 100HP, respectively. Amazing. As per my observation, the third airplane ...
0
votes
0answers
46 views

What's the difference between a propeller that is installed infront of the airplane (nose) and a propeller that is installed behind the nose? [duplicate]

What are the pros and cons of having a propeller in front of the airplane nose rather than behind it ?
70
votes
15answers
17k views

Why don't commercial airplanes carry Earth-observing instruments?

Governments and private companies spend hundreds of millions of dollars to send Earth-observing satellites to capture imagery or scan the terrain with lasers or radars. Meanwhile, commercial planes ...
0
votes
1answer
243 views

How to determine Center of Gravity of the airplane parts? [closed]

I am building a small-medium sized airplane. Is it possible to calculate "C.G" of each part of the airplane? If yes, How? Parts: Wings, Tail, Fuselage, Propeller(?)
1
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0answers
146 views

How can Schrenk approximation be used to model lift load on a rectangular wing?

How can I use Schrenk approximation to calculate load distribution on my rectangular wing? A worked example will be appreciated.
-2
votes
2answers
285 views

Why do drones look different from common airplanes? [duplicate]

In this video is shown Top 5 Military Drone. As we may see, the shape looks different than usual airplanes. My concern is especially with the tail. Normally we know that the tail is vertical. But from ...
3
votes
3answers
681 views

Is lift force less than weight during a descent?

In the above image lift is the same during a climb and during a descent. Is lift force not supposed to be less than weight during a descent? Secondly, does descending at an airspeed much lower than ...
1
vote
0answers
124 views

How to calculate the shear centre of a wing?

How is shear centre of a wings calculated? i.e. how can I calculate the wing shear centre of a two spar wing with main spar at 0% of wing chord and rear spar at 75% of wing chord? (Assuming the two ...
0
votes
1answer
242 views

How are light weight fillers made for fixing dents on airplane wings?

Say an airplane wing was damaged by hail, it's really costly to replace the panel due to inaccessible rivets and what not, and the back of the panel is inaccessible to mechanically remove the dent. ...
1
vote
1answer
313 views

What is the purpose of this span wise “false spar” on Affordaplane wings?

This is the wing of an Affordaplane Ultralight,what is the use of those spanwise foam boards between the foam ribs,I know it's not for aesthetics.
2
votes
2answers
144 views

To determine wing loading, do you need to subtract the weight of the wing from the gross weight?

Is it true that I must subtract the weight of my ultralight wing from the gross weight of my airplane inorder to determine the wing loading of my ultralight airplane? If yes,why is this so? I read a ...
8
votes
2answers
1k views

How does an airplane move itself in the runway? [duplicate]

Basically do they move themselves using their powerful jet/propeller engines to propel themselves forward or do they just use an engine that powers the wheels used for landing? I'm not really asking ...
4
votes
3answers
243 views

Freezing cold cabin housing just under a window

I flew on a Boeing 737 plane yesterday and was sitting next to 2 windows. When I tried to rest my arm on the inner housing of the cabin during the flight, I noticed that the inner cabin housing just ...
1
vote
0answers
98 views

What‘s the diameter of the engines of the Airbus E-Fan?

does somebody know the diameter of the E-Fan‘s engines ? To me the look like around 80cm or what do you think ? Also, with more and wider blades and 60 kW motors instead of 30 couldn‘t they get much ...
4
votes
2answers
733 views

How can I compute the minimum possible bank angle for a turn with a given radius?

I know that I can find an upper bound for the bank angle for a plane, if I know the maximum sustained load factor of that plane because the roll angle and the load factor $n_z$ in a turn are directly ...
1
vote
1answer
177 views

How do wing ribs withstand lateral lift force?

During roll,there is a vertical component of lift that keeps the plane in the air and an horizontal component that actually rolls the plane,how are wing ribs designed to help withstand this vertical(...
2
votes
1answer
397 views

Strut braced or wire braced airplane wings?

For an ultralight (or other airplane designed for slow flight), would a strut-braced or wire-braced wing be more efficient aerodynamically?
23
votes
3answers
2k views

Can this aircraft wreckage be identified?

I live in Salinas (central coast California) and there’s an old plane wreck (located within the boundaries of Toro Park County Park in a remote section). On a hike yesterday, we located and took some ...