Questions tagged [jet]
*Jet* is a generic, informal term for an aircraft with jet propulsion. In a civilian context it may refer to an airliner or small private jet.
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Does anyone know more about the 1958 Heinkel-211 project?
Industria Aeronáutica Argentina worked in the 50s in a Jet airliner, Kurt Tank design, the IA-36, 'Cóndor', with simmilarities to 1958 Heinkel-211 project, turbines intake aspirating fuselage boundary ...
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3answers
267 views
What rate of descent would kill you?
I was watching a video where a plane an MD-82 descended 18,000 feet per minute and crashed into a mountain.
The plane was not upside down/on its side/spiraling- it had about a 5 degree pitch up the ...
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1answer
381 views
What is this jet aircraft appearing in the 2019 TV Series “Black Summer”?
This looks like an F-22 Raptor, but I can hardly see it:
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132 views
Was it ever considered to optimise a jet to normally operate with one engine shut off?
As I understand it, the current trend to reduce all commercial aircraft to no more than two turbofans has long-relevant reasons – the more engines, the higher the fuel consumption – and earlier jets ...
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3answers
585 views
How to Start a Jet Engine [duplicate]
I know how the basics of how jet engines work. I know that air goes into the compressor as the first step of the journey. However, where does the air come from that goes into the jet engine at such ...
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2answers
360 views
Why are there so few high-wing jetliners? [duplicate]
So far, we have only seen a few civilian jet transports with high wings. All of them BAe 146, Do 328JET, seem to be regional jets. Yet military jet transports are almost completely high-wing. Why aren'...
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1answer
70 views
Relationship between wing aspect ratio and speed [duplicate]
For some reason, I cannot find a relatively straightforward source online which discusses the relationship of wing aspect ratio and how it affects speeds of an aircraft.
Specifically, is there a ...
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3answers
175 views
Why are the rudders of quadjets sized to accommodate for a sudden failure of a single engine, rather than two on one side?
For all multiengine jets, the rudder is required to be large enough to allow directional control of the aircraft to be maintained in the event of a sudden failure of one engine, with the other(s) ...
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1answer
109 views
How hot is supersonic intake air?
How hot is the air at the compressor inlet at supersonic speed? For instance the Concorde at mach 2.2 or other jet engines at even higher speeds.
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27 views
Typical burner/combustor dimensions of a jet engine
I know that sounds very generic but lets say for a common engine of a passenger airplane. What could be the typical dimensions for the burner part. I can't find anything online.
Thanks.
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1answer
140 views
Why would an F16 battery make a buzzing sound?
According to this YouTube Video I heard the mechanism that moved the canopy, and then I heard a small buzzing sound. The video description says that it is spooling something, but I don't know what ...
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2answers
186 views
Did the Soviet Union build any commercial jetliners?
I read about a Wikipedia article regarding the Soviet Union's Tupolev 114 which was comparable to the time's jetliners, and brought up the question: Did the Soviet Union build any jetliners for ...
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394 views
What are the pros and cons of high service ceilings for fighter jets?
What are the pros and cons of high service ceilings for fighter jets?
Can they bypass radars and attack effectively at high ceilings?
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1answer
411 views
Is there a minimum number of people needed for an aircraft pushback?
This seems a bit wasteful. Is there a legal requirement for a minimum number of people and if so, on what basis does this vary? (airline, airport, aircraft type, etc)
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5answers
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Locked out of private jet - how do you get in?
Ok I'm not a jet owner, I'm a novel writer. I wanted to get my airplane facts right for the story.
Say my character has a mid-size (can go overseas) private jet. Has a door lock on the outside door ...
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2answers
269 views
Why do jet nozzles close at different rates?
After recently seeing the trailer for Top Gun 2, I was reminded of something that I always wondered about: why do the nozzles of some jet aircraft seem to close at different rates?
Sure, it's likely ...
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4answers
472 views
How to start up a Lockwood-Hiller Valveless Pulse Jet?
So me and my group mates in university got a lockwood hiller valveless pulsejet manufactured, and there was one error in manufacture. We are having trouble with trying to start the engine as ...
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1answer
100 views
Is there an equation for jet engine efficiency as a function of turbine inlet temperature?
I know that there is a relation between the turbine inlet temperature and the engine's efficiency. But, can anyone provide an equation or efficiency as a function of just the turbine inlet temperature?...
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3answers
217 views
Why are the first sounds of an approaching enroute airliner low frequency, booming ones?
Often I will hear an intermittent, low frequency, powerful, booming sound that resolves into that of an airliner flying enroute high (FL 300+) overhead. So the first sounds that an airliner flying ...
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1answer
9k views
Why is this missile positioned in this odd position? How can it be launched correctly?
How this missile is positioned here in this odd position? How this can be launched right from this jet?
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102 views
what is the physical explanation for additive drag?
from what i understand, additive drag is not really drag. it is a way to account for the variation of inlet condition due to conservation of mass.
but i still don't get why it create drag(negative ...
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2answers
95 views
How can the effects of hot corrosion and salt deposits from sea water spray in gas turbine engines be negated/prevented?
In aircraft operating in a maritime environment, corrosive effects from salt water are common. Are there any specific coatings used in engines for such aircraft? If so, which are they? How frequently ...
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1answer
612 views
What do those writings mean that are on the landing gear doors?
I've been watching carrier videos a lot these days and I notice these writings. What do these writings means? I didn't upload all of them, most of the time there are location names and sometimes ...
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3answers
5k views
What kind of jet plane is this?
The cockpit can hold one person, is smaller than a compact car and as narrow as a motorcycle. What kind of plane is this and how hard would it be to fly?
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1answer
106 views
Is it possible to obtain an STC for single-pilot ops in a jet certified for two pilots?
I have been doing research on whether or not one could realistically obtain an STC for a super-midsize jet certified for two pilots and legally fly it single-pilot.
For reference, my chosen aircraft ...
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1answer
79 views
Does the canard config have radically different controls than classic config?
Classic configuration is something like the A320: wings in the middle, horizontal stabilizers at the tail.
Canard configuration is something like the Beechcraft Starship: wings at the back and ...
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3answers
234 views
Could wing tilting be a mechanism for VTOL and high angle of attack for jetliners? [closed]
My question is about turbofan airliners, could an airplane tilt its wings 90 degrees so that the fuselage horizontal axis is perpendicular to the longitudinal axis of the turbo fan. This way an ...
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0answers
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Does/Can combustion instabilities occur in SCRAM jet?
I was told that combustion occurs at Supersonic speeds in SCRAM jet. So acoustic disturbances/ pressure fluctuations can't travel into incoming jet stream. Does this avoids combustion instabilities in ...
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2answers
3k views
How much does it cost to lease a jetliner?
As the title says, how much would it cost to lease a airplane for an airline. Let's say a B737 and a B747 or similar aircraft.
I tried to contact several aircraft leasing companies but so far I've ...
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1answer
142 views
What is the lightest jetliner out there?
What is the lightest commercial jetliner out there? I was thinking of something like a Embraer E170.
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1answer
215 views
Can the maximum thrust of a turbofan engine be estimated by its intake diameter?
I have no clue in aeronautics. How to estimate maximum thrust (at any rated condition, such as altitude, speed, rotation velocity- any given condition) by intake diameter?
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1answer
165 views
Are there reference speeds like V1, Vr or V2 for a touch and go procedure?
Are there any reference speeds like V1, Vr and V2 on a touch and go procedure?
During takeoff, these are used to mark certain states of the takeoff, including the speed at which the aircraft starts ...
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4answers
522 views
What are the advantages/disadvantages of in-fuselage engines (eg most fighter jets) vs wing/fuselage mounted engines?
Most modern jet fighter designs incorporate their engine(s) within the fuselage, while most other medium/large aircraft mount them either under the wings or on the rear fuselage.
What are the ...
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1answer
1k views
What is this yellow tube blowing air? [duplicate]
What is this yellow tube (lower right quadrant of the picture) which is blowing air into the airplane while it's at the terminal? You can see the open hatch on the bottom of the jet through which it's ...
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1answer
147 views
Who made the first high-wing jet airliner?
I thought the only high-wing jet airliners were made by the Soviets but the British Aerospace RJ-100 and Dash 6 series twizzled my mind.
So who made the first high-wing jet airliner?
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3answers
2k views
Are modern fighter jets bulletproof and armored?
Are modern fighter jets bulletproof and armored? One would not be wrong given part of their operations is being on the receiving end of enemy ammunition shooting at them.
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108 views
Would it be possible to start a modern airliner from cold & dark during flight? [closed]
Imagine a suicidal pilot or disturbed passenger who gets access to cockpit, messes with the buttons. He shuts down engines, IRS, and battery, it's the middle of the night at cruise altitude.
Would it ...
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81 views
Are there any feasibility studies or research regarding the possibility of using Jet A in tropical countries?
Based on the ASTM D1655 standard specification for turbine fuels, the only difference between Jet A and Jet A-1 is the freezing point. Max [min?] -40 degrees Celsius (-40° F) for Jet A and max -47 ...
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1answer
501 views
Is there a significant difference between the jet blast from Airbus and Boeing?
I am looking up for jet blast data and there are not much information in the net.
One of the main references I can found are the Airport Planning of each aircraft.
From these can be obtained that the ...
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2answers
1k views
How do they fill fuel in big aircraft?
Being a passenger, I usually will have view from only one side of these planes and hence don't know if same thing is happening on other side of the plane. I have observed hoses connected to wings, but ...
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1answer
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Are turboprops less safe then jets?
On a recent trip to an airport, I noticed a large number of Bombardier Dash 8s. I wanted to know - are turboprops less safe than traditional jets like the 737 or A320? For instance, I would imagine ...
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2answers
433 views
What is the cheapest plane one can buy to fly above Mach 1 and be able to pull 8g plus?
Which plane would you suggest for someone who would like to be able to fly fast enough to break the sound barrier, yet also be able to pull lots of Gs?
What would be the price of such a plane, and ...
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3answers
791 views
Why does load shedding still occur in jetliners (e.g., 787) when there is so much power available?
I had a few questions about how electrical generator works on an aircraft, the 787 to be specific although I know it is similar for all aircraft.
So the 787 engines have 2 VFSG each which are rated ...
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1answer
865 views
Is there an aircraft that can go supersonic at sea level without using afterburner?
Is there an aircraft that can go supersonic at sea level without using afterburner? Quick look through the "supercruise" capable aircraft might be helpful in narrowing down the possibilities, though I ...
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1answer
236 views
How does Boeing Deliver single aisle jets to South east Asia? [duplicate]
I am not sure if they can fly on full tank gas to their destination (say India or Thailand), but how does Boeing deliver single aisle jets to these destinations. I read somewhere about the process of ...
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1answer
560 views
What kind of jet fighter is this?
I visisited Tirana, Albania the first week in August. Outside a shopping mall called "TEG" there was an old jet fighter on display. I can't recognise what make and model this is. Can anybody here help ...
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412 views
Is it possible to power a very small jet using batteries? [duplicate]
I have read a lot of answers on batteries powering large commercial jets, and how it won't work. However, for a small jet like the Honda jet, would it be possible for it to be powered completely by ...
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2answers
449 views
How significant is the lift induced drag contribution to total drag of aircraft at cruise speed?
How significant is the lift induced drag contribution to total drag of aircraft at cruise speed? From what I've learned so far it seems to be around 10 to 15 percent of total drag. I suspect the ratio ...
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4answers
2k views
What drives the shape of an engine's intake on a fighter jet?
Rectangular intakes have more corners which might increase subsonic pressure losses and would weigh larger than a pitot (Semi-circular) type intake. Are the designer drivers solely based on supersonic ...
