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*STOP PRESS* Coronavirus. A lot of Clubs have already cancelled all activities. Check carefully before you plan any travel

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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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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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Bournville Sub Day, Sunday 13th September

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

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    NiMh Battery Pack

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    ex docky
    AMS member

    Posts : 7
    Join date : 2011-06-28
    Age : 66
    Location : Norfolk

    NiMh Battery Pack Empty NiMh Battery Pack

    Post  ex docky on Tue Aug 14, 2012 8:16 pm

    Hi,

    I wish to use a 12v NiMh (sub c 5000 mAh) stick pack in my OTW S class. Does anyome have any ideas how to seal it?

    I was planning to use glue backed heat shrink + silicone at the ends. What size tubing/layers/technique etc

    Thanks

    ex docky
    avatar
    Tom(ADMIN)
    AMS Forum Owner

    Posts : 3002
    Join date : 2010-11-05
    Age : 60
    Location : Nevada, USA

    NiMh Battery Pack Empty Re: NiMh Battery Pack

    Post  Tom(ADMIN) on Tue Aug 14, 2012 10:04 pm

    On my Neptune I use a 6volt 800a/h nImhs pack to power the flashing led's ...there's no sealant, no shrink wrap, nothing...just five cells held together with a turn of insulating tape. The battery pack sits out in the flood area, held in place with a strip of Velcro.

    It's been there like that for over a year, and has never given me a problem. When I think about it I'll give the terminals a wipe over with a drop of vaseline, but it's not very often.

    Works for me...
    david f
    david f
    AMS Treasurer

    Posts : 2086
    Join date : 2010-11-10
    Age : 69
    Location : Cumbria

    NiMh Battery Pack Empty Re: NiMh Battery Pack

    Post  david f on Wed Aug 15, 2012 9:13 am

    I have to say that I have no experience of using NiMHs (I only use lead acids (in water) and Lipos(in the dry))

    Richard's method is interesting and seems to suggest that the idea is - NimH are OK in water but not when kept damp for long periods. So if you are going to use them wet let them drain and dry. If you are going to seal them make sure it really is sealed!

    Sheerline in their later models use NiMHs in a sealed tube as a keel. A good principle in keeping the C of G low. Maybe someone with more experience of Sheerline subs could offer their experience of this?

    David

      Current date/time is Tue Apr 07, 2020 3:20 pm