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*HOPING FOR A BETTER 2021 AND MORE OF THESE EXCELLENT FREE EVENTS ALL AROUND THE COUNTRY!

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CANCELLED because of coronavirus. Papplewick Pumping Station, Nottingham, Sunday 12th & Monday 13th April
CANCELLED because of coronavirus. Bournville Sub Day, Sunday 10th May 2020

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(CANCELLED) Submarine, Boating & Sailing Weekend, Norwich MBC, Weekend of 25,26th July

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Model Boat Convention, Haydock Park (Cancelled this year)

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CANCELLED. Bournville Sub Day, Sunday 13th September

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(CANCELLED) Club Submarine Regatta, Furness MBC, Barrow in Furness, Sunday 20th Sept 2020

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» openLRS on 458Mhz and 433Mhz and submarines
Pingers and Hydrophones to save your sub EmptySat Oct 17, 2020 6:49 pm by tsenecal

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Pingers and Hydrophones to save your sub EmptySat Sep 05, 2020 10:31 am by david f

» Simple telemetry system for openLRS (on 458Mhz)
Pingers and Hydrophones to save your sub EmptySat Aug 29, 2020 1:53 pm by david f

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    Pingers and Hydrophones to save your sub

    david f
    david f
    AMS Treasurer

    Posts : 2118
    Join date : 2010-11-10
    Age : 70
    Location : Cumbria

    Pingers and Hydrophones to save your sub Empty Pingers and Hydrophones to save your sub

    Post  david f on Fri Nov 12, 2010 4:18 pm

    Putting an underwater sound generating Pinger on your sub when combined with the use of an onshore hydrophone means that you are almost certain to be able to recover your submarine (if or when?) you get a sinking.

    The Pinger chips are easily available for AMS members (for £5) but the hydrophone can be an expensive item to purchase.

    A number of people have made their own hydrophones based on the Loughborough University model.

    I include a reference to this to give you an idea but we have a lot more expertise within the AMS and I will post more in future. Generally when the AMS meets e.g Alfold, Barrow etc someone has a hydrophone so you only need the Pinger on your submarine but the more hydrophones out there the better!

    The instructions for the very useful Loughborough unit can be found at:

    The hydrophone itself:
    http://sonar-fs.lboro.ac.uk/uag/downloads/bender2.pdf

    The preamplifier:
    http://sonar-fs.lboro.ac.uk/uag/downloads/preamp2.pdf


    (Note to Webmaster, I will also put this in the electronics section.
    david f
    david f
    AMS Treasurer

    Posts : 2118
    Join date : 2010-11-10
    Age : 70
    Location : Cumbria

    Pingers and Hydrophones to save your sub Empty Re: Pingers and Hydrophones to save your sub

    Post  david f on Fri Nov 19, 2010 9:34 am

    I've put this thread over in the electronics section.


    Last edited by david forrest on Sat Nov 27, 2010 10:55 am; edited 1 time in total
    david f
    david f
    AMS Treasurer

    Posts : 2118
    Join date : 2010-11-10
    Age : 70
    Location : Cumbria

    Pingers and Hydrophones to save your sub Empty Re: Pingers and Hydrophones to save your sub

    Post  david f on Fri Jan 28, 2011 2:24 pm

    Could I recommend also getting a set of lightweight nylon waders (About £30 on eBay).
    They are all you will need to recover your sub in many boat ponds. You get close to the sub using the hydrophone then feel for it with your feet. I speak from personal experience the photo is on Facebook somewhere!
    Waders are much better than swimming in winter too.
    david f
    david f
    AMS Treasurer

    Posts : 2118
    Join date : 2010-11-10
    Age : 70
    Location : Cumbria

    Pingers and Hydrophones to save your sub Empty Re: Pingers and Hydrophones to save your sub

    Post  david f on Sat Jan 30, 2016 1:40 pm

    Some competition for the Pinger coming from the use of openLRS technology.

    https://www.theassociationofmodelsubmariners.com/t83p120-2-4-ghz-and-submarines-also-458-9-mhz#9939

    Have a look at my posting about using a Yagi directional aerial.

    My trials with this suggested that in relatively shallow water (about 4 feet) you could narrow down the search area for a lost sub to about a 20 foot diameter circle.

    About the same as a Pinger and hydrophone. However the Pinger has self contained batteries lasting several weeks. The openLRS receiver will only transmit as long a your main battery lasts.

    What would be really good is if the sunken sub could transmit a GPS location back via Telemetry. As far as I know, the GPS signal does not get through any depth of water?

    But there is still life left in the Pinger concept!

      Current date/time is Mon Oct 19, 2020 10:32 pm