The Association of Model Submariners.

Would you like to react to this message? Create an account in a few clicks or log in to continue.

* 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 a guide to past events see the "Shows and Events" section.

Who is online?

In total there is 1 user online :: 0 Registered, 0 Hidden and 1 Guest

None


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

Latest topics

» Radio ideas -27Mhz
Release valve info needed.. EmptyMon Jan 17, 2022 1:35 pm by geofrancis

» Radio RSSI depth controller
Release valve info needed.. EmptySat Jan 15, 2022 11:30 am by geofrancis

» Mast mounted water level sensor.
Release valve info needed.. EmptySat Jan 15, 2022 1:52 am by geofrancis

» Newcomer to the forum?
Release valve info needed.. EmptyMon Jan 10, 2022 6:45 pm by Tom(ADMIN)

» Type II U-boat
Release valve info needed.. EmptyWed Jan 05, 2022 3:17 am by tsenecal

» Lipo cut off circuit - Practical Electronics magazine - November 2021
Release valve info needed.. EmptyTue Dec 21, 2021 3:40 pm by tsenecal

» bladder systems
Release valve info needed.. EmptyTue Dec 21, 2021 3:35 pm by tsenecal

» Looking for drawings and instructions for Hegi U-25 Kit
Release valve info needed.. EmptySat Dec 18, 2021 12:44 am by Telusboats

» Nautilus II by Robert Fulton
Release valve info needed.. EmptyThu Dec 16, 2021 2:20 pm by david f

Statistics

Our users have posted a total of 11579 messages in 1900 subjects

We have 941 registered users

The newest registered user is PaulBrown

2 posters

    Release valve info needed..

    avatar
    Tom(ADMIN)
    AMS Forum Owner


    Posts : 3012
    Join date : 2010-11-05
    Age : 62
    Location : Nevada, USA

    Release valve info needed.. Empty Release valve info needed..

    Post  Tom(ADMIN) Sat Dec 14, 2013 10:59 am

    I've had a slight change of plan with the Type XX111 ballast system, instead of using that large water pump, I'm thinking of using my little Koge air pump, and inflating a small(ish) bag instead. I can attach the bag on top of the cylinder with velcro, that will save a lot of internal space in the cylinder.

    Question: If I use the air in the cylinder to inflate the bag, what's the best way to release that air and return it to the cylinder? I'm guessing a small valve of some sort (I cannot find the solenoid valve that came with the pump) something like a servo operated pinch valve, along  the lines of those used in the Sheerline boats? Or is there a better and easier way of doing it?

    The smaller the better...


    Release valve info needed.. Untitl14


    Richard
    avatar
    Tom(ADMIN)
    AMS Forum Owner


    Posts : 3012
    Join date : 2010-11-05
    Age : 62
    Location : Nevada, USA

    Release valve info needed.. Empty Re: Release valve info needed..

    Post  Tom(ADMIN) Sat Dec 14, 2013 11:00 am

    I've just tried this pump, and running on 4.8v it filled a small SHG bag in seconds, so it should be ideal for the Type XX111.


    Richard
    david f
    david f
    AMS Treasurer


    Posts : 2214
    Join date : 2010-11-10
    Age : 71
    Location : Cumbria

    Release valve info needed.. Empty Re: Release valve info needed..

    Post  david f Sat Dec 14, 2013 2:00 pm

    I don't use air systems much but you are talking about a valve for fairly low pressure, low pressure drop and no external leaks.

    Modified Schrader (tyre) valves always come to mind but they are not quite right here - pressure a bit low.

    I would have thought that the pinch valve would do the job. The only likely leaks would provide you with a fail safe.

    David

    PS Just thinking about this one. Will the bag not need the pump to also empty it? (My lack of experience of air systems is showing!)


    Last edited by david f on Sat Dec 14, 2013 2:06 pm; edited 1 time in total
    avatar
    Tom(ADMIN)
    AMS Forum Owner


    Posts : 3012
    Join date : 2010-11-05
    Age : 62
    Location : Nevada, USA

    Release valve info needed.. Empty Re: Release valve info needed..

    Post  Tom(ADMIN) Sat Dec 14, 2013 2:05 pm

    I was thinking of a pinch valve, but then someone suggested a tyre valve(which I haven't got)so a pinch valve is on the bench as we speak...as you say, the air leak may come in useful.


    Richard
    david f
    david f
    AMS Treasurer


    Posts : 2214
    Join date : 2010-11-10
    Age : 71
    Location : Cumbria

    Release valve info needed.. Empty Re: Release valve info needed..

    Post  david f Sat Dec 14, 2013 2:08 pm

    Plse see my edit, Richard.

    David
    avatar
    Tom(ADMIN)
    AMS Forum Owner


    Posts : 3012
    Join date : 2010-11-05
    Age : 62
    Location : Nevada, USA

    Release valve info needed.. Empty Re: Release valve info needed..

    Post  Tom(ADMIN) Sat Dec 14, 2013 2:16 pm

    It's a one way pump David...more's the pity.


    Richard

      Current date/time is Thu Jan 20, 2022 5:23 am