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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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Zero Flight Experience to Light Jet Type Rating - Requirements, Feasibility, and Timeline?

Hi everyone I have read this form for a couple months I am someone who is extremely interested in getting my private pilots license. But I am curious about something if I was to at some point secure a ...
FootballFan1846's user avatar
14 votes
6 answers
6k views

Why do jet aircraft need chocks when they have parking brakes?

I work on the ramp servicing small turboprop aircraft (ATR 72 and Q300s) and recently I’ve noticed that they don’t really require us to indicate when we’ve chocked the aircraft, however the larger ...
Mr chi's user avatar
  • 321
4 votes
2 answers
2k views

I'm having a hard time conceptualizing this statement from "The Jet Engine" by Rolls-Royce

This is taken from section 21 of Chapter 3, Compressors that discusses axial flow compressors in turbine jet engines. The more the pressure ratio of a compressor is increased the more difficult it ...
shrimp's user avatar
  • 41
0 votes
2 answers
85 views

How do tubojets compare to afterburning turbofans in terms of efficiency?

Turbojets used to be more common in the 40's and 50's but once jet engine design matured they pretty much went extinct in favor of the more efficient turbofan. I know one advantage of the turbojets is ...
shrimp's user avatar
  • 41
0 votes
0 answers
178 views

What's the meaning of these jet fighter pilots gestures?

As per title, what's the meaning of the following gestures (if any)?
JAS39Gripen fan im not a pilot's user avatar
2 votes
2 answers
281 views

What happens if you preselect your destination QNH during cruise?

I've noticed some pilots preselect their destination QNH on their side of the FCU. In order to preselect the QNH, you need to momentarily switch out of STD which made me wonder: Assuming your side is ...
user38116's user avatar
  • 595
0 votes
0 answers
27 views

TEB-NAS Midsize Jet max weight

We have hours with Sentient Jet and typically fly their Midsize jets -- Hawker 800, Citation XLS, Lear 60 etc. Usually only the XLS will work for us due to large luggage. Can someone help with me with ...
Michael Fishman's user avatar
3 votes
2 answers
353 views

Why was the Me 262's top speed at 6km?

The P-80 had its top speed at sea level, but the Me 262 achieved its top speed at 6km altitude. What were the reasons for this? Was it that the engine was designed for such an altitude to deal with ...
Vinicius Quintela's user avatar
2 votes
1 answer
574 views

Will the new USAF trainer Boeing–Saab T-7 Red Hawk have weapons?

Will the new USAF jet trainer, the Boeing–Saab T-7 Red Hawk, have weapons? I see the mention of the possibility of hardpoints e.g. here: https://www.thedrive.com/the-war-zone/42760/air-force-wants-...
AlphaCentauri's user avatar
5 votes
3 answers
967 views

How does momentum thrust mechanically act on combustion chambers and nozzles in a jet propulsion?

I'm asking this question since I can't intuitively understand how the acceleration of mass flow and therefore the increase of its momentum can actually mechanically act on the combustion chamber ...
MK.s's user avatar
  • 65
28 votes
1 answer
11k views

What does this hand gesture of fighter jet pilots mean?

I am trying to understand more of the gestures fighter jet pilot use. I have seen this gesture many times: Does anyone know what this gesture mean? Are there any good resources about the gestures ...
Quinten's user avatar
  • 1,158
7 votes
1 answer
291 views

Why do the arresting gear cables need to be pushed/ guided back?

Also, what is the yellow metal stick officially called?
aerojetman62's user avatar
25 votes
2 answers
6k views

Slanted Brown Rectangles on Aircraft Carriers?

What are the rectangles adjacent to the arresting gear on Aircraft Carriers? Are they service hatches? https://www.kastalon.com/wp-content/uploads/2017/10/ford-emals-3.jpg
aerojetman62's user avatar
20 votes
3 answers
6k views

Which fighter jet is this, based on the silhouette?

6 to 8 of these planes flew through the Ogwen Valley in North Wales, UK, this morning (2nd of June). Hawks and other training jets are common sights, but I’ve not seen these before and can’t identify ...
Darren's user avatar
  • 605
4 votes
1 answer
306 views

Nutritional value of jet fuel (from a microbe's point of view) and which of their byproducts is causing the fuel tank corrosion?

Self-described "pilot, aerospace engineer, and mad scientist" YouTuber Jack Schneider's video Growing Microbes in Jet Fuel explains that if a layer of water accumulates below jet fuel (due ...
uhoh's user avatar
  • 6,028
-1 votes
4 answers
3k views

Why do we consider that air comes into jet engine?

While calculating air pressure and temperature during cruise of jet engines, we consider that air comes into the jet engine inlet with our flight velocity. But why? In fact, air stops stagnant in ...
Jawel7's user avatar
  • 244
0 votes
1 answer
329 views

What were the main differences between Whittle's British turbojet and Von Ohain's German one?

I cannot fully understand in simple words the differences between the axial flow engine (Von Ohain) and Whittle's centrifugal turbojet.
DSElon's user avatar
  • 9
0 votes
1 answer
119 views

What increases the rotational velocity of air in an axial flow compressor?

In an axial flow compressor as used in modern jet engines, the goal of a compressor rotor is to increase the angular momentum of the air by imparting an increase in swirl velocity. (Note: the goal of ...
interested22's user avatar
8 votes
1 answer
1k views

Why are most of KBOS's instrument departures and arrivals jet-only?

I was looking through the big book o' KBOS instrument procedures when I noticed that almost all of the airport's SIDs and STARs are marked "NOTE: For turbojets only" or some variation ...
Vikki's user avatar
  • 28.4k
11 votes
5 answers
3k views

Buzz-saw noise from big turbofans at high thrust

This topic has been addressed many times on this and other forums. I have seen (and often not fully understood) some deep technical analyses, incuding manufacturers' research labs, since this is a ...
cTen's user avatar
  • 111
1 vote
3 answers
539 views

What long-range jet is easiest to fly?

Of jet aircraft with sufficient range to cross the Atlantic on a full tank of fuel, which is easiest to fly? More specifically: The required range is from New York's JFK Airport, to Shannon Airport, ...
rwallace's user avatar
  • 113
-2 votes
1 answer
385 views

What does "throttle is staggered" mean? [closed]

What does "throttle is staggered" mean? and how is it related to adjustment of MEC(Main Engine Control) in B737-300(CFM56-3C)?and which are safety issues regarding that?
DYNAMICS's user avatar
0 votes
0 answers
72 views

Why do air planes not have a "grating" in the front of the jet engines for safety? [duplicate]

This is what a typical jet engine looks like: Considering the horrible dangers with birds getting in there and crashing planes, why doesn't it look like this? Why don't they have a "grating&...
Caymon Sawaged's user avatar
20 votes
4 answers
10k views

Is it possible to fly around the world to stay in daylight with a fighter jet?

I was wondering if it is possible for a fighter jet to fly around the world and stay in daylight? For the Southern and Northern Hemisphere, the time and speed of daylight is different during seasons. ...
Quinten's user avatar
  • 1,158
6 votes
4 answers
6k views

Can electricity be harvested from magnets in jet engines?

I was reading about bleedless-787 power system but found out it still requires a gearbox. What if you put coils around the "tube" part of the jet and tiny magnets in the end of the fan/...
user3638379's user avatar
0 votes
1 answer
638 views

Understanding fuel tanks/pumps of Fighter jet

I have observed fighter jets performing maneuvers like inverting, Turing around in sharp angles etc. This may subject plane to G forces and other dynamic forces. How does fuel tank ensure steady ...
Sohail Khan's user avatar
1 vote
1 answer
4k views

How does the F-16 engine startup work?

So, the simplest way to start up an F-16s engine is to flip the power switch to "main power" and then set the "jet fuel" switch to "Start 1" or "Start 2". I ...
Caeleste's user avatar
  • 202
2 votes
0 answers
154 views

How is %MAC affected by flap/slat position on swept wing, transport category aircraft?

If you watch the slats and flaps deploy on a swept wing, transport category aircraft, and you mentally draw a chord line, you'll notice that it's changing through the slats/flaps deployment schedule. ...
ryan1618's user avatar
  • 14.9k
3 votes
0 answers
327 views

What is the highest operational ceiling for a nuclear scramjet?

A similar question is: What is the highest operational ceiling for an air-breathing jet engine? The answers point to scramjets. Cited reports focus on combustion kinetics. The Wikipedia Scramjet page: ...
DrBunny's user avatar
  • 51
4 votes
4 answers
4k views

What is maximum acceleration that can be achieved by afterburner in level flight?

I am wondering how a fighter jet (let's take F-22 for example) would compare to other vehicles in terms of acceleration while in flight. For cars and motorcycles, achieving 0-100 KPH in 2 seconds is ...
Abanob Ebrahim's user avatar
2 votes
0 answers
174 views

Overheating (fire thrown out of the nozzle) [closed]

At first I copied https://www.jetcat.de/en/productdetails/produkte/jetcat/produkte/hobby/Engines/P160_rxi_b Where I manufactured and installed all the parts and they are very similar to the original ...
Mark's user avatar
  • 29
7 votes
1 answer
2k views

What are all the composites used in the making of fighter jets? What is the green and yellow material on the aircraft in the pictures below? [closed]

Below given are images of various fighter jet manufacturing.
SRIMON .S DILEEP's user avatar
13 votes
9 answers
10k views

Were propeller airplanes significantly more "scary" to fly in compared to modern jet ones?

I've flown exactly once in my life. It was in 2004, with a commercial jet. Not a "jumbo", but a normal-sized jet plane in common use for cheap flights in that year. (Well, twice if you ...
Kashious's user avatar
  • 163
1 vote
0 answers
78 views

How to calculate turbojet thrust at variable altitudes and mach numbers?

I am interested in developing a flight model in jbsim. jbsim requires a thrust table similar to as follows, with varying mach and altitude numbers (with thrust as a fraction of max): ...
S.Stevens's user avatar
  • 143
5 votes
1 answer
336 views

What is this jet seen in the Falcon Crest TV series?

This is another jetliner from "Falcon Crest" I'm trying to identify. It was visible briefly in episode # 194 <8.11> "True Confessions" (1989). Thanks for your help!
TJP's user avatar
  • 251
19 votes
1 answer
2k views

What is this jetliner seen in the Falcon Crest TV series?

I'm trying to identify this jetliner from the "Falcon Crest" TV series filmed in 1984 It's from episode # 068 <3.28> "Ashes to Ashes". This is the only scene featuring the ...
TJP's user avatar
  • 251
1 vote
0 answers
102 views

What is the first fighter jet aircraft which carried out a night bombing mission?

Does anyone know in which occasion it was carried out and the date which it was carried out? Night bombing began in World War I and was widespread during World War II. A number of modern aircraft ...
Shihan Rukshitha's user avatar
16 votes
1 answer
4k views

Can a jet stream make a subsonic plane fly at a supersonic speed relative to the ground?

If a plane flies with a jet stream, its speed relative to the ground is the sum of the speed of the jet stream and the speed of the plane relative to the air in the jet stream. If the speeds that are ...
Aspro's user avatar
  • 171
9 votes
5 answers
5k views

Do jet aircraft have a better glide ratio than propeller aircraft in general? If so, why?

Being fond of aviation, I play with software simulators a lot. I have noticed that while jets seem to be able to glide for a long distance even at zero throttle, propeller aircraft need to be ...
Ritesh Singh's user avatar
4 votes
4 answers
2k views

Why so much throttle work on navy fighter during final approach?

• Look at his left hand: why so much throttle work while flying? What is he doing? • Is the throttle response very slow? It seems to me that the fighter don't accelerate so much when he gives full ...
user avatar
-1 votes
1 answer
176 views

Are there jet aircraft for whose flights astrodynamics must be taken into account? [duplicate]

Civilian jet airliners don't need to push their yokes down to follow the curvature of the Earth because within the atmosphere the curvature is accounted for by automatical systems, right? I wonder ...
Giovanni's user avatar
3 votes
2 answers
382 views

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 ...
Urquiola's user avatar
  • 1,631
0 votes
3 answers
1k 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 ...
MathIsLife12's user avatar
0 votes
1 answer
809 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:
KTDD's user avatar
  • 467
1 vote
2 answers
192 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 ...
leftaroundabout's user avatar
4 votes
3 answers
684 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 ...
Luke Justin's user avatar
  • 1,181
1 vote
2 answers
1k 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'...
Abdullah is not an Amalekite's user avatar
2 votes
1 answer
1k 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 ...
sethkim's user avatar
  • 21
4 votes
2 answers
1k views

Why aren't quadjets required to remain controllable after a sudden, simultaneous failure of two engines on one side?

For all multiengine jets, it must be possible to maintain directional control of the aircraft in the event of a sudden failure of one engine in flight, with the other(s) firewalled, down to not far ...
Vikki's user avatar
  • 28.4k
3 votes
1 answer
276 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.
Jon Knapp's user avatar

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