Screaming Aircraft

Discussion in 'Aviation' started by Peebs, Apr 19, 2012.

  1. Peebs

    Peebs Member

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    Ok, so now I'm back in the saddle,

    I attended the recent RAAF bi annual air show at RAAF Williams, Point Cook, and was again taken by the 'Scream' of our own little CAC Boomerang.

    I've had a bit of a hunt on youtube and found this little clip for those of you who may want a listen.


    View: https://www.youtube.com/watch?v=nKLAiw5dMrs

    Obviously there is the 'Stuka', but i was wondering about other WWII Favorites you all have????
     
  2. Peebs

    Peebs Member

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  3. MikeGazdik

    MikeGazdik Member

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  4. GregP

    GregP Well-Known Member

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    That sound is the supercharger. All superchargerd engines make that sound, even a Camaro or ... a Merlin. The volume depends on the suopercharger ratio.
     
  5. rednev

    rednev New Member

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    What is supercharger ratio of the boomerang in the film clips ?


    tongue firmly in cheek.
     
  6. wuzak

    wuzak Well-Known Member

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    When I went to Duxford a few years back I don't recall the MkIX Spitfires screaming, though I heard some whine from the Mustangs - though not as prominent as that in the video.

    I thought that there was some other explanation, but then I found this video


    View: https://www.youtube.com/watch?v=txeKZE4_kHg

    Greg, you sure that car supercharger whine is not for a different reason, eg belt whine?
     
  7. rochie

    rochie Well-Known Member

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    i thought the whine on a P-51 was from the gun tubes in the wings ?
     
  8. Airframes

    Airframes Benevolens Magister

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    Would the supercharger be 'in' at the low levels flown at air displays?
     
  9. wuzak

    wuzak Well-Known Member

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    Always "in" on Rolls-Royce Merlins and Griffons.
     
  10. mikewint

    mikewint Well-Known Member

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    I recall the Skyraiders in Vietnam making a similiar whistle while making a low pass. Aways thought it was due to various things sticking out into the air stream much the way a car window will "whistle" a certain speeds. My Saturn Sky is turbo and it makes more of a "growl" than a whistle
     
  11. evangilder

    evangilder "Shooter"
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    The whistle you hear on a Mustang is through the gun barrels. You can hear the difference when you hear one with the barrels still in it versus the ones that are capped off.
     
  12. MikeGazdik

    MikeGazdik Member

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    #12 MikeGazdik, Apr 24, 2012
    Last edited: Apr 24, 2012
    Well, I was always "told" the Mustang howl was from the radiator scoop. Also the "whistle" in the F4U was the oil cooler radiators in the wing roots. I have not seen a Spitfire in person, on video I haven't heard the howl as in the Mustang with the same powerplant.

    That being said, when I first heard a Mustang in person, I thought it was the supercharger. I am a drag racer, and thus familiar with the sound of a supercharged engine. I was "corrected" at that airshow and told it was the air scoop.

    So which is it? Supercharger, scoops, gun tubes?
     
  13. mikewint

    mikewint Well-Known Member

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    More than likely a combination of all three. The Stuka's made their scream long before sirens were added to increase the sound
     
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