Questions tagged [aircraft]
Aircraft are man-made vehicles intended to operate while flying through Earth's atmosphere.
306
questions
0
votes
0
answers
26
views
How do I learn about Rockets and planes? [closed]
I want to learn how to make aeroplanes and rocket, how they work, etc. I want to be able to make working models. How do I go about it, what books can i read, what videos can I watch for easy, clear ...
- 1
0
votes
1
answer
41
views
Calculating aerodynamic forces on a random object
I've set out to designing a game that would let the user design a vehicle/plane and then fly it around and I'm interested in what would be the best way to go about the physics aspect of it.
The 3d ...
- 1
0
votes
1
answer
33
views
Spinning top stabilisation for a type of aircraft/drone
Spinning tops use gyroscopic precession to be able to stay upright whilst spinning.
Would it be possible to use this phenomena to create a flying craft that would be stabilised by gravity and the ...
- 1
1
vote
0
answers
25
views
Is there a minimum power required to keep a drone or helicopter in the air - and if so, what is it? [duplicate]
Assuming a mass M and horizontal projection of area A for a hovering object (no wind) like a drone or helicopter, what's the minimum power required to keep it hovering? Let's assume no ground effects....
- 228
1
vote
0
answers
121
views
In gyroscopic effect of a quadcopter, why does precession cause torque, not vice versa?
I don't know if the header corresponds to my actual quest but i will explain.
In quadcopter dynamic equations of Newton-Euler formation that I have encountered in all academic publications, torque ...
- 21
0
votes
1
answer
59
views
Does a helicopter fly because air is forced downwards, or because each rotor acts as an aerofoil to generate lift? [duplicate]
The answer may be a combination of the two.
Does a helicopter fly because air is caught by the rotor and thrown downwards, which causes an equal reaction in the opposite direction and 'throws' the ...
- 101
1
vote
2
answers
222
views
Why is accelerating more air slower more efficient than less air faster?
According to this answer on Aviation Stack Exchange, when propelling an airplane it is more efficient to accelerate a bigger amount of air a little than to accelerate a small amount of air a lot. Why ...
- 275
20
votes
7
answers
6k
views
Why aren't helicopter blades tapered?
From my understanding helicopter blades work similar to a planes wings, ie the air going over is faster due to the shape. So my question is why then are the blades rectangular? ie they are the same ...
- 973
0
votes
0
answers
37
views
Lift generated by airfoil and why does a flow with a positive angle of attack around a flat plate curve upwards instead of downwards?
I've recently been reading about what really causes lift on an airfoil and the article linked mentions that even a symmetric airfoil or even a flat plate generates lift as long as the angle of attack ...
- 531
0
votes
2
answers
63
views
Do airfoils need narrowing tails to create a forward force?
All airfoils I have seen become narrow towards the trailing edge.
Is it still possible to create a forward vector force if the shape becomes wider again after a narrow middle section?
I read that the ...
- 31
0
votes
0
answers
71
views
Calculate wind speed on aircraft given measurements of speed and heading
I have X amount of speed measurements of an aircraft, each measurement includes a heading and a forward ground speed.
What I want to do is to calculate the wind speed affecting the craft.
For example:
...
- 1
0
votes
1
answer
32
views
Is the wing drag of induced drag + 2d drag at 0lift still accurate for cambered airfoils?
I have some work at uni that requires some aerofoil analysis to create a wing, but from the polar plots its clear that the cambered aeros have lower total 2d viscous drag (from xfoil) at the cl its ...
- 113
1
vote
1
answer
123
views
Mechanics of the "airplane" thrown at angle to the horizon
Good day!
I am interested in the solution of the following problem, could you please help me.
Suppose that we have some solid airplane. We throw this airplane at some angle $\theta$ to the horizon ...
2
votes
2
answers
109
views
Why is there sound aboard Concorde after it goes supersonic?
I recently saw a video from a passenger of Concorde after it goes supersonic. Inside the aircraft, there is still a loud roar similar to what we hear in aircraft today.
However, since the aircraft is ...
- 205
0
votes
1
answer
53
views
Why doesn't a Hang-glider Stop Moving Forward, Stall and Fall?
Why doesn't a hang-glider stop moving forward (because of air resistance), stall and fall?
0
votes
1
answer
67
views
What's the reason an airplane turning 180° from strong headwinds causing it to have no ground speed does not stall?
I saw a video of a small propeller plane hovering over the ground due to strong headwinds but then turns 180 degrees and flys away. I was trying to figure out if the plane shouldn't be stalling ...
- 1
0
votes
0
answers
29
views
If a spacesuit cracks open, does the astronaut blow up due to difference of pressure? [duplicate]
Me and my friends had a discussion on emergencies in outer space. One questioned what would happen if a spacesuit ruptured and exposed an astronaut to vaccuum. One claimed that since there is no ...
1
vote
0
answers
43
views
Airflow on wing, simple force analysis
(Look at the picture)
Let's assume there is an horizontal plane impacted by diagonal airflow with components from coming downwards and ahead. If we say that the airflow is fully deviated by the ...
- 19
0
votes
1
answer
66
views
What is responsible for an airplane's sound?
Airplanes traveling at supersonic speeds produce sonic booms because the pressure waves they create converge to produce an extra high intensity wave. But what about planes traveling at slower speeds? ...
0
votes
1
answer
77
views
Rocket flying around earth at constant speed and constant altitude
I am trying to make a rocket move around the earth at constant speed and constant altitude on a WGS84 earth within a python simulation (right now the output is a pandas dataframe). I start with the ...
1
vote
0
answers
23
views
Buoyant Air Kinetic Energy in a Lagrangian Approach to Derive Airship Equation of Motion
I am currently working on deriving airship equations of motion, in a fluid in motion (unsteady and non-uniform wind). The article cited in most sources is Equations of Motion of a Vehicle in a Moving ...
- 33
1
vote
3
answers
95
views
In an aeroplane's jet engine, where is the forward force applied to the mass of the plane?
In a standard jet engine on a standard aeroplane, is the majority of forward force received by the aeroplane (which causes it to be propelled forwards) applied on the compressor blades, the rotor ...
- 181
0
votes
1
answer
50
views
The relationship of yaw and roll on a spacecraft using Trust Vector Control
I’ve previously asked the question how does applying rudder (yaw) on aircraft also cause roll. Turns out it’s caused by both the rudder usually being above or below the center of mass and the ...
1
vote
1
answer
223
views
How does the newton's third law generate enough lift to make the airplanes fly? [closed]
How does the newton's 3rd law generate enough reaction so as to make the airplanes fly to great heights? The airplanes push air downwards but really is that enough to make the airplanes fly to great ...
10
votes
5
answers
3k
views
Is it possible to statically generate lift with the difference in pressure like wings?
If I understood it correctly, the shape of the wings and/or propellers generates lift/thrust with the difference in pressure in both sides of the wings/propellers; where the lower side has higher ...
- 277
1
vote
0
answers
33
views
PI controller - output calculation [closed]
The propeller of an airship is connected to a DC motor. The motor is being controlled using a PI controller. The PI controller has a proportional gain of Kp = 2, and an integral gain of Ki = 0.5, and ...
- 31
0
votes
2
answers
64
views
Why are the blades of a pedestal fan so different from the blades on an aircraft propeller?
Both fans and propellers move a quantity of air. In the former, that is the end goal. In the latter, this movement of air creates a force in the direction opposite to the airflow. So, why are the ...
- 41
0
votes
3
answers
503
views
Would Aeroplanes or Helicopters work on our Moon?
Would Aeroplanes or Helicopters work on our Moon?
In general , I think , in Aeroplane Case:
(1) Air is required for Aeroplanes to float : Would Moon have enough air?
(2) High speed is required for ...
- 460
-2
votes
1
answer
96
views
Any skilled pilots? Explain how a craft flies over the curve of the earth [closed]
So, flat earthers believe that there are no adjustments, whether in manual or autopilot, to maintain level flight over curved surface such as earth. But, altitude is determined by barometric pressure (...
0
votes
2
answers
156
views
Windspeed and Aeroplanes
Say we had an airplane cruising at velocity $V$ and the airplane was going from point $A$ to $B$. If the wind was also blowing in the same direction from $A$ to $B$, at a velocity $U$, could we say ...
- 195