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* THE FORUM FOR ALL THOSE INTERESTED IN BUILDING AND OPERATING MODEL SUBMARINES *



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For further details of any events shown here also see the "Shows and Events" section on the forum

*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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Latest topics

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» Pinger 3 - Distance measurement (Triangulation, Transponders and Clocks on Board)
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    Lipo Batteries

    david f
    david f
    AMS Treasurer

    Posts : 2137
    Join date : 2010-11-10
    Age : 70
    Location : Cumbria

    Lipo Batteries Empty Lipo Batteries

    Post  david f on Fri Apr 01, 2011 12:14 pm

    We have had a few enquiries about Lipos in submarines and I thought it would be worth sharing my experiences.

    I have used them in both the Holland, Resurgam and now the Dzik (U uPVC class) for about 3 years with good results.

    No fires or explosions just one dead battery after only 3 charges (£25 down the spout.Boo Hoo!)

    This may have been a faulty battery or the fact that I was not using a balancer charger then.

    The Lipos I use are about 1800mAh capacity and give a "typical" duration of about 30 minutes which is fine for show or club use.

    I now use a very simple Turnigy Compact Balance Charger C3 with good results.

    I use a "home brewed" low voltage alarm which can be heard close too.

    This could be improved but LED's need connecting up, waterproof connections etc. The commercial BEC's often seem to warn low voltage by cutting the throttle, which is not that noticeable in a sub.

    Suggestions please?
    david f
    david f
    AMS Treasurer

    Posts : 2137
    Join date : 2010-11-10
    Age : 70
    Location : Cumbria

    Lipo Batteries Empty Re: Lipo Batteries

    Post  david f on Tue Apr 05, 2011 1:18 pm

    I forgot to add that I have not burned the house down yet! I have been charging them on ceramic tiles and storing them in Pyrex dishes.

    I've just ordered a couple of "Lipo Sacks" from ebay for about £4 each which may be a better way to go.
    avatar
    Tom(ADMIN)
    AMS Forum Owner

    Posts : 3003
    Join date : 2010-11-05
    Age : 61
    Location : Nevada, USA

    Lipo Batteries Empty Re: Lipo Batteries

    Post  Tom(ADMIN) on Tue Apr 05, 2011 2:18 pm

    I've only ever used LiPo's in my Chinook heli, so I haven't had that much experience with them, I was going to fit a LiPo pack in the little Kilo because of the size and weight of the pack, but I was told that I could'nt run the radio from them, so I never did use them.

    The packs I had always worked perfectly, and I can't say I ever had any issues with charging them either...the charger that came with the Chinook was a balanced one, and I'd run a pack through, land...put that one on charge in a Pyrex dish, plug the other charged pack in, and off we'd go again. I was warned that I should let the packs cool down before recharging them, but to be perfectly honest, I never did, and there were no nasty bangs or emissions of smoke from them at all.

    The Biber will use either a 12volt 5.5 amp gel cell or a set of 10 nicads depending on what room I have left after all the other bits and bobs are installed, so there won't be a chance of using Lipo's in that.

      Current date/time is Fri Jan 22, 2021 4:47 pm