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What causes the sudden spool-up sound from an F-16 when enabling afterburner?

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What causes the sudden spool-up sound from an F-16 when enabling afterburner?


What is an afterburner and how long can a jet fly on afterburner?What do we hear, on the ground, from a helicopter in flight?How does an aircraft distribute fuel equally between powering the turbines on the engine and injecting it into the afterburner?Why do military jets seem to always take off using the afterburner?What effect would a afterburner have on the compressor if the nozzle outlet is not increased?What causes the “growl” of some large turbofans at takeoff thrust?What did the “gear warning horn” on the North American P-51 sound like?Bright exhaust in afterburner vs no visible (bright) exhaust when not in afterburner?What's the mechanical 'whoosh, whoosh' sound in this video?Is jet fuel typically injected before or after the flame holder in an afterburner?













6












$begingroup$


What causes the sudden spool-up sound from an F-16 when enabling afterburner?



I've included a video to make it clear what sound I'm referring to:








at 1:16, I assume the pilot engages afterburner (again), and there is a sudden spool-up sound associated with this.



Am I even correct in assuming this is what's happening? I don't understand what this sound is though, it doesn't seem to appear consistently. Throughout the video, it appears the pilot engages afterburner and turns it off multiple times, but the sound only appears once.



Bonus question: What is the purpose of running the engine like this, and how is the F-16 attached to the ground?










share|improve this question









$endgroup$











  • $begingroup$
    Thanks for the early accept. Of course feel free to change it if a more helpful answer is posted.
    $endgroup$
    – ymb1
    4 hours ago















6












$begingroup$


What causes the sudden spool-up sound from an F-16 when enabling afterburner?



I've included a video to make it clear what sound I'm referring to:








at 1:16, I assume the pilot engages afterburner (again), and there is a sudden spool-up sound associated with this.



Am I even correct in assuming this is what's happening? I don't understand what this sound is though, it doesn't seem to appear consistently. Throughout the video, it appears the pilot engages afterburner and turns it off multiple times, but the sound only appears once.



Bonus question: What is the purpose of running the engine like this, and how is the F-16 attached to the ground?










share|improve this question









$endgroup$











  • $begingroup$
    Thanks for the early accept. Of course feel free to change it if a more helpful answer is posted.
    $endgroup$
    – ymb1
    4 hours ago













6












6








6





$begingroup$


What causes the sudden spool-up sound from an F-16 when enabling afterburner?



I've included a video to make it clear what sound I'm referring to:








at 1:16, I assume the pilot engages afterburner (again), and there is a sudden spool-up sound associated with this.



Am I even correct in assuming this is what's happening? I don't understand what this sound is though, it doesn't seem to appear consistently. Throughout the video, it appears the pilot engages afterburner and turns it off multiple times, but the sound only appears once.



Bonus question: What is the purpose of running the engine like this, and how is the F-16 attached to the ground?










share|improve this question









$endgroup$




What causes the sudden spool-up sound from an F-16 when enabling afterburner?



I've included a video to make it clear what sound I'm referring to:








at 1:16, I assume the pilot engages afterburner (again), and there is a sudden spool-up sound associated with this.



Am I even correct in assuming this is what's happening? I don't understand what this sound is though, it doesn't seem to appear consistently. Throughout the video, it appears the pilot engages afterburner and turns it off multiple times, but the sound only appears once.



Bonus question: What is the purpose of running the engine like this, and how is the F-16 attached to the ground?















f-16 afterburner sound






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 4 hours ago









AlphaCentauriAlphaCentauri

4541310




4541310











  • $begingroup$
    Thanks for the early accept. Of course feel free to change it if a more helpful answer is posted.
    $endgroup$
    – ymb1
    4 hours ago
















  • $begingroup$
    Thanks for the early accept. Of course feel free to change it if a more helpful answer is posted.
    $endgroup$
    – ymb1
    4 hours ago















$begingroup$
Thanks for the early accept. Of course feel free to change it if a more helpful answer is posted.
$endgroup$
– ymb1
4 hours ago




$begingroup$
Thanks for the early accept. Of course feel free to change it if a more helpful answer is posted.
$endgroup$
– ymb1
4 hours ago










1 Answer
1






active

oldest

votes


















5












$begingroup$

My first guess based on the sound repeating when the thrust is idled near the end of the video is that's the sound of the actuators of the variable geometry nozzle.



Googling that actually auto-completed it to Great F-16 Actuator Sound (video).



Bonus answers to the bonus questions:



  1. It's a ground test of the engine, making sure it's working fine with no leaks.

  2. The F-16 has a tail-hook like carrier-borne planes, if you look closely a cable is attached to that hook, which itself is attached to the ground. The F-16, F-15, and other land-based fighters have it in case of an emergency, they'd land on a runway with a braking wire across it.





share|improve this answer









$endgroup$













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    1 Answer
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    1 Answer
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    active

    oldest

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    active

    oldest

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    5












    $begingroup$

    My first guess based on the sound repeating when the thrust is idled near the end of the video is that's the sound of the actuators of the variable geometry nozzle.



    Googling that actually auto-completed it to Great F-16 Actuator Sound (video).



    Bonus answers to the bonus questions:



    1. It's a ground test of the engine, making sure it's working fine with no leaks.

    2. The F-16 has a tail-hook like carrier-borne planes, if you look closely a cable is attached to that hook, which itself is attached to the ground. The F-16, F-15, and other land-based fighters have it in case of an emergency, they'd land on a runway with a braking wire across it.





    share|improve this answer









    $endgroup$

















      5












      $begingroup$

      My first guess based on the sound repeating when the thrust is idled near the end of the video is that's the sound of the actuators of the variable geometry nozzle.



      Googling that actually auto-completed it to Great F-16 Actuator Sound (video).



      Bonus answers to the bonus questions:



      1. It's a ground test of the engine, making sure it's working fine with no leaks.

      2. The F-16 has a tail-hook like carrier-borne planes, if you look closely a cable is attached to that hook, which itself is attached to the ground. The F-16, F-15, and other land-based fighters have it in case of an emergency, they'd land on a runway with a braking wire across it.





      share|improve this answer









      $endgroup$















        5












        5








        5





        $begingroup$

        My first guess based on the sound repeating when the thrust is idled near the end of the video is that's the sound of the actuators of the variable geometry nozzle.



        Googling that actually auto-completed it to Great F-16 Actuator Sound (video).



        Bonus answers to the bonus questions:



        1. It's a ground test of the engine, making sure it's working fine with no leaks.

        2. The F-16 has a tail-hook like carrier-borne planes, if you look closely a cable is attached to that hook, which itself is attached to the ground. The F-16, F-15, and other land-based fighters have it in case of an emergency, they'd land on a runway with a braking wire across it.





        share|improve this answer









        $endgroup$



        My first guess based on the sound repeating when the thrust is idled near the end of the video is that's the sound of the actuators of the variable geometry nozzle.



        Googling that actually auto-completed it to Great F-16 Actuator Sound (video).



        Bonus answers to the bonus questions:



        1. It's a ground test of the engine, making sure it's working fine with no leaks.

        2. The F-16 has a tail-hook like carrier-borne planes, if you look closely a cable is attached to that hook, which itself is attached to the ground. The F-16, F-15, and other land-based fighters have it in case of an emergency, they'd land on a runway with a braking wire across it.






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 4 hours ago









        ymb1ymb1

        70.1k7224372




        70.1k7224372



























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