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Questions tagged [afterburner]

Any questions asking about afterburners and how they work.

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1answer
81 views

Is jet fuel typically injected before or after the flame holder in an afterburner?

I don't have the best grasp on the intricacies of afterburners but I'd assume that if the engine has a flame holder then fuel would be injected before it in order to allow it to heat up to ...
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1answer
111 views

Bright exhaust in afterburner vs no visible (bright) exhaust when not in afterburner?

When a jet engine has its afterburner engaged, a bunch of fuel is dumped into the back of the engine for additional thrust. This burning fuel causes the exhaust and inside the engine to glow brightly,...
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1answer
237 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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2answers
290 views

Are afterburners required to be engaged during catapult launch?

Is it required to engage afterburners during catapult launches from an aircraft carrier? This answer mentions that afterburners are used for night takeoffs as per regulations, but not required during ...
6
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1answer
297 views

What effect would a afterburner have on the compressor if the nozzle outlet is not increased?

In order to operate an afterburner, it is necessary to adapt the nozzle outlet area. As far as I understand it is necessary to open up the nozzle when the afterburner is increasing its temperature or ...
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2answers
591 views

Are warbirds allowed to use afterburners?

Suppose a civilian buys a military jet, for example an T-38. Would he be allowed to use afterburners?
3
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1answer
248 views

How does the EPR reading behave in reverse, and in reheat modes?

Will an engine pressure ratio indicator (EPR) show the same at full mil thrust as with full reversed thrust? What does the EPR indicate at afterburner active? Will it just show the same as for max mil ...
7
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3answers
2k views

Is it possible to have an afterburner in a turbofan with bypass ratio greater than 1:1?

Is it possible to have an afterburner in a turbofan with a bypass ratio greater than 1:1? At 1.05:1, say, can it have an afterburner?
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1answer
3k views

Why do military jets seem to always take off using the afterburner?

I was wondering. At different places I heard that civilian airplanes often (or even most of the time?) take off at less than 100% thrust. For example a question that tackles this is here: Is it ...
5
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1answer
895 views

How does the Pratt & Whitney F119 achieve its features?

The Wikipedia article on the Pratt & Whitney F119 that powers the F-22 says the following: The high pressure and low pressure turbines are single stage and counter-rotating, thus shortening ...
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1answer
221 views

How does an aircraft distribute fuel equally between powering the turbines on the engine and injecting it into the afterburner?

How does an aircraft distribute its fuel equally between powering the engine turbines and injecting it into the afterburner?
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2answers
3k views

What is missing from a non-afterburning engine to prohibit the use of afterburning?

What components are missing in a non-afterburning engine that an afterburning engine does, so that it can't use afterburning?
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1answer
652 views

Will afterburner work at settings less than full dry thrust?

Dry thrust is normal jet engine power without using an afterburner. Max dry thrust is the engine's most powerful thrust level without afterburner. But what if the engine is at half power, or even ...
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4answers
29k views

What is an afterburner and how long can a jet fly on afterburner?

I heard this word so many time in military documentary about jets, especially fighter jets, but I don't fully understand what it is or how it works. In a documentary from the Discovery Channel, all ...