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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

» Making end caps
bicycle CO2 inflation systems EmptyWed Oct 21, 2020 3:07 pm by tsenecal

» openLRS on 458Mhz and 433Mhz and submarines
bicycle CO2 inflation systems EmptyTue Oct 20, 2020 11:20 pm by tsenecal

» New AMS member Henry from South Australia
bicycle CO2 inflation systems EmptyTue Oct 20, 2020 3:27 pm by david f

» New member intro
bicycle CO2 inflation systems EmptyTue Oct 20, 2020 3:23 pm by david f

» Krick Type Vll B Wiring and build photos
bicycle CO2 inflation systems EmptyFri Oct 09, 2020 3:15 pm by PeterJames

» bicycle CO2 inflation systems
bicycle CO2 inflation systems EmptyWed Oct 07, 2020 1:15 am by salmon

» use of 458MHz modules
bicycle CO2 inflation systems EmptyFri Oct 02, 2020 6:51 am by tsenecal

» Newcomer to the forum?
bicycle CO2 inflation systems EmptyThu Oct 01, 2020 10:05 pm by SimonH

» Ship model event in Fassberg, northern Germany, on 20th of September 2020
bicycle CO2 inflation systems EmptyTue Sep 29, 2020 10:38 pm by Hermann

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Our users have posted a total of 11186 messages in 1834 subjects

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The newest registered user is cliffhanger7

    bicycle CO2 inflation systems

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    SimonH

    Posts : 3
    Join date : 2020-09-29
    Location : Nottingham, UK

    bicycle CO2 inflation systems Empty bicycle CO2 inflation systems

    Post  SimonH on Thu Oct 01, 2020 10:17 pm

    Has anybody tried using bicyle CO2 cylinders as a compressed gas source? From the various tables I've ssn about the I reckon the small CO2 cylinder has the equivalent of about 1.5 l (i.e. the volume of a fat bike tyre) at about 100 psi, so quite a lot of CO2 for about £1 each and about £20 for the adaptor. I think the big issue is that it would probably need a regulator to drop the pressure to a more more controllable value.

    As a second question I am thinking about using a peristaltic/tube pump to provide a trim function, as both models I am think about (Seehund or X-class) only have a rear p[lane so getting the trim right seems important. I was planning to have 2 small trim tanks at the extreme ends of the boat, but they could be sealed or at ambient pressure (diaghram?) by linking via a tube to allow the air to flow from tank to tank as well as the water.

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    Deep Diver (Fred)
    Deep Diver (Fred)
    AMS member

    Posts : 259
    Join date : 2010-11-07
    Age : 72
    Location : Peacehaven East Sussex

    bicycle CO2 inflation systems Empty CO2

    Post  Deep Diver (Fred) on Sun Oct 04, 2020 2:31 pm

    We did have a member that used Freon gas in his sub's, and that worked well, he also tried using a Sodastream gas bottle but that did not work out to well.

    Fred

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    salmon
    salmon
    AMS Forum Owner

    Posts : 300
    Join date : 2011-09-02
    Age : 60
    Location : Las Vegas, Nevada - USA

    bicycle CO2 inflation systems Empty Re: bicycle CO2 inflation systems

    Post  salmon on Mon Oct 05, 2020 10:54 pm

    CO2 was done a lot in the mid to late 80's, however the issue with CO2 is the +850 psi it is stored at. There were issues to say the least, but there were many successful subs using it. Freon use was changed to compressed air (not actually air) but it is stored at ~75 psi. This gas system is still used today.

    So, can you do it. Absolutely, but you are dealing with a lot of pressure and bad things can happen.


    _________________
    If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

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    tsenecal
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    Posts : 130
    Join date : 2015-04-01

    bicycle CO2 inflation systems Empty Re: bicycle CO2 inflation systems

    Post  tsenecal on Tue Oct 06, 2020 4:15 pm

    a lot of model subs use a single peristaltic pump for their single ballast bag.

    i have two.

    one is Norbert Bruggen's Delta,
    the other is a moebius models skipjack converted to r/c with parts that originally came from a thundertiger neptune.

    the peristaltic pump systems both work well, but are slower than airpump or freon based systems


    as to the rest of the system you describe...  take this as constructive criticism... it sounds terribly complicated, i personally believe in the K.I.S.S. principle.

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    salmon
    salmon
    AMS Forum Owner

    Posts : 300
    Join date : 2011-09-02
    Age : 60
    Location : Las Vegas, Nevada - USA

    bicycle CO2 inflation systems Empty Re: bicycle CO2 inflation systems

    Post  salmon on Wed Oct 07, 2020 1:15 am

    I met Tim several years ago and will tell you he is brilliant. He can build the most complicated submarine if he wanted. So, his advice to keep it simple is real wisdom. Do not complicate your build. I was taught crawl, walk, run - so same principle. Begin simple and as you gain real knowledge increase what you do to your sub.


    _________________
    If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

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