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
73 views

Can we get 0:40 thrust to weight ratio from three small engines

Because I have an engine of 13 hp four stroke 1 cylinder that pulls about 0:20 T/W ratio. and is it possible to multiply the thrust by two? Using two more small engines which is 6.5 hp each on the ...
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2answers
115 views

Will my CRI CRI twin engine plane fly if I replace the engine with a single 15hp gasoline engine? [closed]

I'm using a lighter materials to rebuild plane, to cut down plane weight to 56kg and a 1.2m 3blades propeller.
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0answers
40 views

What are typical control surface deflection “rate” limits for transport airplanes?

I was wondering if anyone knows what are some typical control surface/actuator deflection "rate" limits for transport airplanes (i.e. aileron/elevator/rudder deflection rates)? I haven't ...
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1answer
171 views

Is Rutan's method of foam core construction obsolete?

Is Rutan's method of foam core construction obsolete, or is it used on other fibreglass designs as well?
7
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2answers
496 views

Unusual airplane shown in Google Earth

At first I thought it was a plane that had its wings removed for some reason. Then I thought it might be a lifting body, but I don't think so. Any ideas? This was in Jacksonville, FL; I can provide ...
13
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1answer
2k views

Can someone identify the Make and Model of airplane that this fuselage belonged to?

This gutted fuselage remnant was photographed by my mother at Whaler's Bay on Deception Island in Antarctica in 1994. Deception Island is directly south of the Falkland Islands in the narrow area ...
7
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2answers
406 views

Can anyone identify this old airplane?

Can anyone identify this old airplane, and/or what era it's likely to be from? The photo is from northern Italy, and it's the only photo I have. I'd be very grateful for the help!
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2answers
2k views

Can anyone Identify this FLY FAIR seaplane?

This photograph, from my family's collection, of a high-winged, dual rotary engine, amphibious airplane, probably in the 1930's, appears to be an excursion plane at a fair since it has "FLY FAIR&...
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1answer
115 views

Why do we lean the mixture in a turbocharged airplane (C182T)?

An increase in Altitude will result in a decrease of atmospheric pressure -1 in. Hg. / 1000ft (ISA conditions), but with a turbocharged airplane it will keep the pressure constant (+/- MSL pressure) ...
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0answers
92 views

What happens if you put too much oil into a reciprocating engine wet sump?

Apparently putting too much oil into your airplane engine is really bad and can be expensive but why? Will the excess oil go out via the oil breather,... ? Thank you
6
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2answers
473 views

Is there a modern day “replacement” for the de Havilland Beaver?

Is there a modern day equivalent or replacement for the Beaver's Payload, STOL and floats capabilities? By replacement, I mean that it can fly into the same airstrips under the same weather with the ...
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1answer
185 views

Can I fly this six motor drone? [closed]

My body weight; 70kg, Drone weight; 50kg, Props length 0.7m, 6 motors (2hp each), Total weight 120kg, Total horsepower 12, Each motor runs 3000rpm, Please can I fly it. Thanks!!! drawing of the drone
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3answers
501 views

What is the reason Light Sport Aircraft (LSA) minimum speed is limited? [closed]

I saw an explanation about Icon A5 Light Sport Airplane (LSA), it is said that according to FAA regulation, its stall speed NOT LESS than 45 miles per hour (mph) or around 39.1 knots or around 72 km ...
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1answer
57 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
242 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
87 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
220 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
415 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
63 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
51 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
1k 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
72 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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0answers
159 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
241 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
167 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 ...
4
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2answers
731 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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2answers
486 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
234 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
1k 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 ...
4
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5answers
394 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
102 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
123 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?
13
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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
7k 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 ...
9
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2answers
426 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
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1answer
315 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
153 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
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1answer
142 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
718 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
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1answer
409 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
237 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
4k 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
120 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
329 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 ...
25
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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
209 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 ...
8
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1answer
662 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
263 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