Questions tagged [airplane]

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

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2
votes
1answer
219 views

Is it a good thing that ailerons remain deflected and the stick is hard to move?

The aileron stick of my homebuilt ultralight is stiff (hard to move) and the aileron itself can remain in its deflection angle hands free, is that a good thing?
4
votes
3answers
254 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 ...
0
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5answers
766 views

Why wing ribs have diagonal struts

Why do ribs have diagonal struts,why not vertical as seen in airfoils of Citabria airplane?
1
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0answers
101 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
889 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 ...
0
votes
1answer
281 views

What is the bank angle that should be sustained to move in a uniform circular motion? [duplicate]

I want to deduce the rate of turn of targets that move in a uniform circular motion. The radius of the different circles are known in advance. I have searched for my question and found the following ...
0
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2answers
710 views

What is the average g force experienced on takeoff for an ultralight?

How much g-force is made on an ultralight during take off if its upward velocity of 2m/s?And what's the average g force experienced during takeoff on an ultralight?
1
vote
1answer
186 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
456 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 ...
2
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4answers
483 views

Could modern military aircraft be retrofitted to work with alternative fuels instead of kerosene?

I am geologist and I have heard in 50 years petroleum will be nearly gone. I know for commercial planes there are working projects with clean energy. I can be wrong, but I think military systems ...
19
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2answers
2k views

What's the function of the plate behind the wheels of the Pilatus Porter?

Anyone knows what's the plate behind the wheel of the Pilatus Porter for?
3
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0answers
148 views

How does pitot tube shape affect indicated airspeed? [closed]

Air flow over wings and engine inlets greatly changes due to a number of factors, such as atmospheric conditions, speed, and the design of the surfaces. On some engines you can see mist behind the ...
0
votes
1answer
241 views

Do mono spar wings need compression strut(or ribs)?

Loyolksip Regarding airplane wings, are compression struts needed in a mono spar wing? Secondly, are anti drag and drag wires needed in a mono spar wings?
4
votes
1answer
2k views

Is it best to use a thick airfoil or an undercambered airfoil for slow speed flight?

The more the thickness,the more the frontal resistance,hence the more the drag a thick airfoil will produce. Under cambered can help increase lift without increasing the airfoil thickness , therefore ...
1
vote
2answers
162 views

Why flaps can deflect up to 25°+ without stalling the wings? [duplicate]

According to this graph,plain flaps have their highest Cl at about 2 and stalls at about 15°,my question is how then do airplane flaps reach 25°+ of delflection when this gragh clearly states that ...
6
votes
3answers
3k views

What are the disadvantages of using just rudder to roll an airplane?

Ultralights with slight dihedral will roll and yaw on rudder input (e.g the Bloop 3, Maxair Hummer) so some don't have ailerons for the sake of simplicity. Is this kind of control input advisable, or ...
2
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2answers
2k views

Is airfoil thickness proportional to drag coefficient?

Does increase in the thickness of a camber airfoil mean more drag will be produced? Why do slow flying planes have thick airfoils when it will just slow them down even more?
1
vote
1answer
297 views

Do elevators have cambered airfoils inverted or symmetrical airfoils

Do horizontal stabilizer of ga planes e.g cessna 172(or ultralights e.g lazair) have cambered airfoils inverted to provide the tail downward force or do they have symmetrical airfoils at negative aoi ...
-4
votes
2answers
510 views

What is this aircraft seen over Southern California? [closed]

It looked similar in shape to the DH108 Swallow seen at the top of this website https://en.wikipedia.org/wiki/Tailless_aircraft The best likeness I have found online (except the wings were flat and ...
9
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2answers
3k views

Why are airplanes called ‘she’?

What is the reason that airplanes in English have a female gender? Please illuminate the historical or scientific reason.
-3
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2answers
234 views

100% Homebuilt Airplane [closed]

THIS IS JUST A SIMULATION OF THE INTENDED AILERON THAT I'LL BUILD AND PUT ON MY HOMEMEADE PLANE.(I scrampled all the materials I could find in my backyard). Do you find any abnormality in this aileron ...
5
votes
3answers
1k views

Can I use PVC pipes for the rib on the wings of my homemade airplane? [closed]

Can I use a PVC pipe as the rib of the wings of my homemade airplane?A rib is already load tested, and it failed at 40kg of weight and it is supposed to hold just 10kg in flight.
1
vote
1answer
432 views

Why do some airplanes fly at a very low speed (like this one) at a speed of 433 km/h (234 knots) at a whopping high altitude of 26,500 ft?

Okay. So I'am just having a doubt on this flight (BA359) flying from Lyon, France en-route to London Heathrow. It is flying at a way low speed of 433 km/h (234 knots) in which i think is a bit weird. ...
0
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0answers
76 views

What would it take to bring a more efficient lifting-body airplane design (possibly a BWB) to commercial market? [duplicate]

I know that the MAIN reason Boeing and Airbus are held back on this is the development costs. It costs a lot to even develop a slightly new design, let alone mass manufacturing it. But that's the ...
17
votes
7answers
6k views

Why are airplanes described as the safest method of transportation? [closed]

I will have my first flight tomorrow. It is my first time that I get into an airplane, and by the time am writing this post, I am feeling anxious and stressed a lot. I even don't talk to anyone as it ...
1
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0answers
50 views

How do interceptors communicate with the airplane crew when the radio is dead? [duplicate]

A week ago an airplane lost the radio connection to the tower due to technical difficulties in German airspace (article in german). Thats why interceptors started to escort the plane and to check if ...