The Association of Model Submariners.

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



Join the AMS - Registered Forum users can become members of the AMS and it's free ...... To join send an email with your name , address and phone number to amstreasure@googlemail.com


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

*2021 AND SOME EVENTS ARE BEING PROPOSED. Keep them coming and let us know the details! (amstreasure@googlemail.com)

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;:;


Model Sub Weekend, 28th, 29th August. Bluewater Parkway, Greenhithe, DA9 9

Bournville Sub Day. Sept 2021 is looking likely. More details TBA.

Barrow in Furness Regatta and Sub day. Maybe in Sept 2021. Details TBA.

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Most users ever online was 180 on Tue Nov 05, 2019 6:03 am

Latest topics

» GRP end caps
An eye opening piece of footage... A Lipo fire EmptyTue Jul 20, 2021 9:31 am by david f

» WW2 mini sub build
An eye opening piece of footage... A Lipo fire EmptyTue Jul 20, 2021 9:15 am by david f

» Good 3D beginner's tutorial
An eye opening piece of footage... A Lipo fire EmptyFri Jul 16, 2021 3:14 pm by david f

» Looking for drawings and instructions for Hegi U-25 Kit
An eye opening piece of footage... A Lipo fire EmptyThu Jul 15, 2021 1:25 am by Telusboats

» Merit 1/35 X craft
An eye opening piece of footage... A Lipo fire EmptyTue Jul 13, 2021 3:54 am by tsenecal

» UHF radio control for submarines (openLRS, LoRa, FSK etc. on 458Mhz and 433Mhz )
An eye opening piece of footage... A Lipo fire EmptyMon Jul 05, 2021 10:43 am by david f

» The workings of a sheer line submarine
An eye opening piece of footage... A Lipo fire EmptyWed Jun 30, 2021 9:03 am by subkraft

» Bonjour from France.
An eye opening piece of footage... A Lipo fire EmptyMon Jun 28, 2021 1:43 pm by Tobyledog

» Underwater navigation using UHF ?
An eye opening piece of footage... A Lipo fire EmptyFri Jun 25, 2021 5:46 pm by SimonH

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The newest registered user is Aniello

    An eye opening piece of footage... A Lipo fire

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    Tom(ADMIN)
    AMS Forum Owner

    Posts : 3002
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    An eye opening piece of footage... A Lipo fire Empty An eye opening piece of footage... A Lipo fire

    Post  Tom(ADMIN) Thu Nov 28, 2013 11:58 am

    This is a bit frightening...that's why I bought a LiPo safety bag.



    Last edited by david f on Wed Oct 29, 2014 9:22 am; edited 1 time in total (Reason for editing : clearer title)
    acrowot (Geof)
    acrowot (Geof)
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    An eye opening piece of footage... A Lipo fire Empty Re: An eye opening piece of footage... A Lipo fire

    Post  acrowot (Geof) Thu Nov 28, 2013 1:38 pm

    Good video i can remember every one panicing when lipos came out as long as you use a lipo bag and take care when setting up the charger there should be no problems.
    ive been using them for years so far so good

    take care geof
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    Tom(ADMIN)
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    An eye opening piece of footage... A Lipo fire Empty Re: An eye opening piece of footage... A Lipo fire

    Post  Tom(ADMIN) Thu Nov 28, 2013 1:54 pm

    I'm a complete newcomer to LiPo technology, Geoff...the little JellyBean will be the first boat I've built that has a LiPo battery powering it. I've taken every precaution I can...I have a charging bag, an old Pyrex plate to put the battery on when I charge it, an an electronic monitor as well.

    Belt n' braces, that's me!
    acrowot (Geof)
    acrowot (Geof)
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    Post  acrowot (Geof) Thu Nov 28, 2013 3:22 pm

    better safe than sorry i say
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    Dr.Schmidt
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    Post  Dr.Schmidt Fri Oct 24, 2014 9:25 am

    I use LiFePo batteries. Much safer than LiPos, long-lived and they have way more capacity than NiC
    david f
    david f
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    An eye opening piece of footage... A Lipo fire Empty Re: An eye opening piece of footage... A Lipo fire

    Post  david f Tue Oct 28, 2014 9:02 am

    I've been using Lipos regularly in several subs over the last 5 years. No problems so far (touch wood!) even after several floodings. Be careful with the charging - Lipo bags outdoors. Always have an in line fuse in the model.

    They are very light and compact and so open up different design configurations. They also hold their charge well.
    Hermann
    Hermann
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    Post  Hermann Tue Oct 28, 2014 7:04 pm

    There is no doubt that Lithium batteries are state of the art and offer many benefits compared to conventional battery chemistries (e.g. lead-acid, NiCd,...), however I still use NiCd and NiMH batteries in my submarine models just to minimise the risk of fire. Of course I could at least double the endurance with Lithium batteries of the same weight but up to now I am still satisfied with the two hours I can achieve with my conventional batteries.
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    Dr.Schmidt
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    Post  Dr.Schmidt Tue Oct 28, 2014 9:24 pm

    As I said, LiFePo batteries are perfectly safe. As safe as NiC but with almost the capacity of LiPos.

    Cheers Andreas
    david f
    david f
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    Post  david f Wed Oct 29, 2014 9:34 am

    LiFePo look to be very good but they don't seem to be "mainstream" technology and so they don't seem to be easily available in a wide range of sizes.

    Most of the technology we get comes courtesy of the r/c aircraft chaps and they seem to have gone for Lipo in a big way (presumably weight and capacity)

    But Lipos are a contentious issue. For example I know that major players in the field such as Norbert Bruggen don't like the use of Lipos. They seem to be much more accepted by US sub modellers, as far as I can see.
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    Dr.Schmidt
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    Post  Dr.Schmidt Wed Oct 29, 2014 10:12 am

    LiFePos come in many sizes and the technology is identical to LiPo. I use LiFePos in my U-1 bot for the receiver as well as themain battery and will do so for the Nautilus, too.
    Hermann
    Hermann
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    Post  Hermann Fri Oct 31, 2014 6:05 pm

    Dr.Schmidt wrote:. ...I use LiFePos in my U-1 bot for the receiver as well as themain battery and will do so for the Nautilus, too.  

    Hi Andreas,
    why do you use a separate battery for receiver supply? The main battery as single power source in combination with a switchmode DC-DC buck (down) converter would also do the job.
    Benefit: you have to charge one battery only (and take care for it) and the amount of energy drawn from the main battery is neglegible compared to the energy taken for the propulsion train. Of course switchmode converters require some Attention concerning EMI Suppression but my models run since years with such a Kind of central power supply (my old class 206a model since 20years meanwhile).

    Best regards
    Klaus-Dieter ("Hermann")
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    Dr.Schmidt
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    Post  Dr.Schmidt Fri Oct 31, 2014 6:10 pm

    I could also use the bec of the speed controllers. What can I say.....its a habit.


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