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Electric Air Raid Sirens... - Page 2
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  1. #11
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    Default Re: Electric Air Raid Sirens...

    Quote Originally Posted by Alcock View Post
    No, i am contemplating buying one to add to my Cold War Collection - but if i am going to get one i want to know how easy they are to connect to the mains.
    Should be easy enough to connect to the mains,with the closure of many Coastguard stations and small Police stations there must be quite a few sirens around because as far as I know they were all fitted with them.My local CG station had one fitted in the event of some need to use it.An electrician could wire it up for you.

  2. #12
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    Default Re: Electric Air Raid Sirens...

    Quote Originally Posted by DJ OSKA View Post
    hehehehe I have 2 Castle Castings sirens :-D (and I don't intend to part with them- ever!)

    Both are powered by a 5hp 3-phase electric motor and weigh in at about 85kg each.
    sirens at 5 hp wouldent want to be near them when powered up any idea how far away they can be heard? some serious power there

  3. #13
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    Default Re: Electric Air Raid Sirens...

    If you want it as a museum piece.. keep it original.. but for a working demonstration would it not be easier to swap out the vintage 3-phase for a modern 5HP single phase motor? As long as the shaft aligns, the motor is just a means of spinning up the noise generator. Matched for power and RPM, I can't see a reason why a modern motor wouldn't be just as good for demonstrating. Chris, I believe you've spun yours up on an 18V battery drill.
    flickr
    To get your bolt out, press "6"

  4. #14
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    Default Re: Electric Air Raid Sirens...

    Quote Originally Posted by SaltGeorge View Post
    Chris, I believe you've spun yours up on an 18V battery drill.
    I have indeed...

    You can see such a demonstration HERE:

    But trust me, a 240V drill is better! You can feel it through the shed floor!
    When I can get away with it, I'll post a video of a 240V demonstration...

    Castle Castings DID do a single-phase version of their sirens, but it draws way too many amps and will trip the switch on a standard domestic 240V setup...

    Also, it is worth noting that Castle Castings did a variant with a 3-phase 7HP motor- the next model up from mine!

  5. #15
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    Default Re: Electric Air Raid Sirens...

    I have access to generators that have a 3phase output....
    Thank You to Flickr for Hosting my Images

    Trying to Stay off the Tourist Trail.

  6. #16
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    Default Re: Electric Air Raid Sirens...

    Quote Originally Posted by TripleSix View Post
    I have access to generators that have a 3phase output....
    You have access to everything!

    Why didnt i think of you!

    I think im gonna buy one now then - it'll look good on the next open day

  7. #17
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    Default Re: Electric Air Raid Sirens...

    I have now started work on my SECOND siren...

    Maybe if I get time, I can bring mine along to an open day...

    I took one of mine to the 1940s weekend at Weybourne Station, Norfolk, last weekend- after twisting people's arms to let me have it on static display on the platform!

  8. #18
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    Default Re: Electric Air Raid Sirens...

    some nice sirens and info here

    http://www.airraidsirens.com/

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