How to make a real life size stuka siren

Discussion in 'Other Mechanical Systems Tech.' started by SA80, Jan 9, 2009.

  1. SA80

    SA80 New Member

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    Could any one help me does anyone know the workings of the stuka siren i know it was propeller driven and went under the wing not much else thow.
    How did it work? is it a simple design? does any one have blue prints? thanks very much for reading SA80
     
  2. Colin1

    Colin1 Active Member

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    Wasn't the 'Jericho Horn' simply a variation on the air raid siren theme?
    The air raid siren being hand-cranked and the variation in pitch provided by simply hand-cranking it faster?

    Mounted on the Ju87, the manual drive was replaced by a suitable alternative, a small propeller driving the unit instead; the variation in pitch here being provided by the Ju87's increase in speed as its dive progressed.

    I've an idea Doppler Effect would have been instrumental here, too, particularly if you were the position (or close to the position) being targetted.
     
  3. Colin1

    Colin1 Active Member

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    Hi
    home from work
    This is about the best I could find in my library, it names the parts but rather unhelpfully, it doesn't point the names at anything although it's mainly self-explanatory.

    Hope this helps
     

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  4. fly boy

    fly boy Member

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    thats what those are i thought it was to power lights
     
  5. GrauGeist

    GrauGeist Well-Known Member

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    There's a "brake" or more closely, a clutch, that keeps the siren mechanism from sounding until the drive brakes are released. As soon as the drive brakes are retracted, the Jerico Trumpet disengages.

    As I posted in another thread regarding this, sometimes the brake didn't reset, and the pilot had to listen to the thing all the way back to base...

    By the way, awesome detail image, Colin!
     
  6. Colin1

    Colin1 Active Member

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    Well, at least they'd know he was coming and could put the kettle on for a nice, soothing cup of tea...

    Stuka Ju87
    Alex Vanags-Baginskis
    Illustrations by Rikyu Watanabe
    Jane's Publishing Company Limited
    ISBN: 0 7106 0191 3

    I have to say I agree with you, Mr Watanabe is a master illustrator, as he is in the rest of the series.

    Sadly, as is the case with so many other aircraft book series (Ian Allen 'at war' series springs to mind), they're out of print; they do crop up here and there in online book communities and on eBay every now and again.
     
  7. Andy_the_Ace13

    Andy_the_Ace13 New Member

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    how do them sirens work? like what makes the noise?
     
  8. bobbysocks

    bobbysocks Well-Known Member

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    I'm going to say the slots on both sides of the prop. those would give it an old fire engine sound. i remember cranking one of those sirens ( more years ago than i wish to admit ) as a kid.
     
  9. Shortround6

    Shortround6 Well-Known Member

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    We still use mechanical sirens;

    Q-Siren | Sirens

    They seem to move people out of the way at least as good or better than any of the electronic sirens.:)
     
  10. Trebor

    Trebor Well-Known Member

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    I would have thought that once the stuka goes into a dive, the siren props would spin so fast that the tips of the blades would break the sound barrier, thereby giving it that wailing siren sound.
     
  11. GrauGeist

    GrauGeist Well-Known Member

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    The Jerico Trumpet was wind driven, and the Stuka in a dive didn't reach speeds that would allow the Trumpet's propellor tips reach that velocity.

    There's hollow cavities that interact with vanes driven by the prop, so that when the propellor spins, it creates a tone, much like a mechanical siren on an emergency vehicle or an Air Raid siren...
     
  12. Shinpachi

    Shinpachi Well-Known Member

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  13. jamal brickstone

    jamal brickstone New Member

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    Hi, would you mind reposting that file? I'm going to try and build a stuka siren
     
  14. fubar57

    fubar57 Well-Known Member

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    Colin1 hasn't been here for more than 5yrs.


    Geo
     
  15. jamal brickstone

    jamal brickstone New Member

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