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



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*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
building a 1/96 THRESHER r/c submarine EmptyTue Jul 20, 2021 9:31 am by david f

» WW2 mini sub build
building a 1/96 THRESHER r/c submarine EmptyTue Jul 20, 2021 9:15 am by david f

» Good 3D beginner's tutorial
building a 1/96 THRESHER r/c submarine EmptyFri Jul 16, 2021 3:14 pm by david f

» Looking for drawings and instructions for Hegi U-25 Kit
building a 1/96 THRESHER r/c submarine EmptyThu Jul 15, 2021 1:25 am by Telusboats

» Merit 1/35 X craft
building a 1/96 THRESHER r/c submarine EmptyTue Jul 13, 2021 3:54 am by tsenecal

» UHF radio control for submarines (openLRS, LoRa, FSK etc. on 458Mhz and 433Mhz )
building a 1/96 THRESHER r/c submarine EmptyMon Jul 05, 2021 10:43 am by david f

» The workings of a sheer line submarine
building a 1/96 THRESHER r/c submarine EmptyWed Jun 30, 2021 9:03 am by subkraft

» Bonjour from France.
building a 1/96 THRESHER r/c submarine EmptyMon Jun 28, 2021 1:43 pm by Tobyledog

» Underwater navigation using UHF ?
building a 1/96 THRESHER r/c submarine EmptyFri Jun 25, 2021 5:46 pm by SimonH

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    building a 1/96 THRESHER r/c submarine

    merriman
    merriman
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    building a 1/96 THRESHER r/c submarine Empty building a 1/96 THRESHER r/c submarine

    Post  merriman Sun Sep 23, 2018 2:44 am

    building a 1/96 THRESHER r/c submarine F30Gw6
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    building a 1/96 THRESHER r/c submarine 800<a href=building a 1/96 THRESHER r/c submarine KjZVxg
    building a 1/96 THRESHER r/c submarine ZlV2Vz
    building a 1/96 THRESHER r/c submarine HwFe88x600q90/923/s8OcDE.jpg" />
    building a 1/96 THRESHER r/c submarine S8OcDE
    salmon
    salmon
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  salmon Sun Sep 23, 2018 3:59 am

    David,
    What is the mirror wax used for in that photo of the aft section being molded?
    Peace,
    Tom


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    If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.
    merriman
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  merriman Sun Sep 23, 2018 4:19 pm

    salmon wrote:David,
    What is the mirror wax used for in that photo of the aft section being molded?
    Peace,
    Tom


    Typically I use the Buna wax as one-half of a two-part GRP part-release (wax-PVA) system when employing hard-shell type tools.

    In this particular case I'm casting RTV silicon rubber tools that feature porous foam blocks -- they reduce the volume of the flask to limit the amount of expensive tool making rubber. The wax is used to fill the surface of these rough surfaced displacing blocks in order to ease removal of the RTV tool once it's changed state from liquid to solid.


    As silicon rubber will not stick to anything but silicon rubber -- meaning I don't bother with a mold-release when casting a tool -- you still have to reduce the 'tooth' of anything you want to later part from the hardened rubber.

    David

    salmon
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  salmon Sun Sep 23, 2018 11:52 pm

    Thank you for explaining that to me

    David, when you cast a metal shaft or rod in a piece, what do you do to the metal rod to keep it from sticking to the hardened resin?


    _________________
    If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.
    merriman
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  merriman Mon Sep 24, 2018 3:35 am

    salmon wrote:Thank you for explaining that to me

    David, when you cast a metal shaft or rod in a piece, what do you do to the metal rod to keep it from sticking to the hardened resin?


    No part-release is required for mandrels/inserts used to produce a bore in cast resin parts.

    building a 1/96 THRESHER r/c submarine Lr7HmX

    building a 1/96 THRESHER r/c submarine 4Bb3YB

    However a mandrel used in metal casting must first be coated with silicon grease to make it an easy task of removing the mandrel from the frozen part.

    building a 1/96 THRESHER r/c submarine Je1tfD

    building a 1/96 THRESHER r/c submarine IRDv6Z

    building a 1/96 THRESHER r/c submarine 3Tb2YS

    Sometimes I'll used a preformed RTV silicon rubber mandrel, such as here:

    building a 1/96 THRESHER r/c submarine C7ViFc

    building a 1/96 THRESHER r/c submarine ZKhSHH

    David
    merriman
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  merriman Mon Sep 24, 2018 3:44 am

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    David
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    timgarrod
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  timgarrod Mon Sep 24, 2018 8:01 pm

    Hi Merriman,

    great build log. learning alot from this.
    Thanks
    merriman
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  merriman Mon Sep 24, 2018 9:24 pm

    timgarrod wrote:Hi Merriman,

    great build log. learning alot from this.
    Thanks


    What I've presented so far in this thread (pictures with no text) is a teaser. By the end of the year I hope to have finished a proper construction article, chronicling the work from concept, masters, tools, parts, to completed model.

    However, any questions put forward here will be answered to the best of my ability (which is considerable!).

    David
    merriman
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  merriman Mon Sep 24, 2018 11:28 pm

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    building a 1/96 THRESHER r/c submarine Z4AonQ

    David
    david f
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  david f Tue Sep 25, 2018 10:03 am

    That is beautiful work! Thanks for posting.

    David
    merriman
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    Post  merriman Tue Sep 25, 2018 11:19 am

    david f wrote:That is beautiful work! Thanks for posting.

    David

    Thank you, sir.

    Just passing on the things many in this game shared with me. We all are the sum of the things those who came before us shared. We either pass it on, or it will be lost. There are no secretes to this Craft, only fools who think there are secretes.

    Once robot (CAD, CNC, 3D, etc.) produced models become accepted by all, the chain of knowledge-pass-down will be broken. And another Craft will be lost to the world -- the only remaining reminders of hand produced models in the form of the yellowing pages of ancient model magazine articles.

    I've lived too long!

    David
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    building a 1/96 THRESHER r/c submarine Empty Re: building a 1/96 THRESHER r/c submarine

    Post  merriman Wed Sep 26, 2018 2:07 am

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    David

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