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, Papplewick pumping station, Nottingham, 21,22 April
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    willie skipjack no2

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    willte
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    willie skipjack no2

    Post  willte on Mon Dec 16, 2013 5:31 pm

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    Re: willie skipjack no2

    Post  Tom(ADMIN) on Mon Dec 16, 2013 5:40 pm

    That's a big cylinder...
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    willte
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    Re: willie skipjack no2

    Post  willte on Mon Dec 16, 2013 6:02 pm

    not that big when you see the battery 2x6voltx4amp jell type takes the tube down in the water for a nice draft
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    Re: willie skipjack no2

    Post  Tom(ADMIN) on Mon Dec 16, 2013 6:17 pm

    Mine has a 24" long, 80mm diameter cylinder, with a water pump ballast system.

    Richard
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    Re: willie skipjack no2

    Post  david f on Wed Dec 18, 2013 9:16 am

    Hi Willte,

    Interesting photos. I think I can see why you are looking for aluminium tubing of a specific size. Is it because you are using the same commercial end caps for different submarines?

    If so there is one skill/availability that would really help you with subs - Lathe access either your own or someone elses. End caps with O ring seals are not very difficult to make.

    David
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    willte
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    Re: willie skipjack no2

    Post  willte on Wed Dec 18, 2013 5:20 pm

    I know DAVID if I was still working   i would have made my own  I am a lathe turner by trade  trouble is finding a lathe in Lossie with all the places that had one are now closed all was  fancy but the price for a big one and where to keep it bets me but I have this one for small jobs also a milling machine to fit it
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    Re: willie skipjack no2

    Post  david f on Thu Dec 19, 2013 8:42 am

    Yes, where to keep a lathe is a big problem for most people. I inherited my Dad's Myford lathe but had nowhere to keep it.

    I now compromise with a US made Taig (Known as a Peatol in the UK) lathe which is not much bigger than yours. With riser blocks fitted (a lot of people forget about riser blocks) I can turn 110mm diameter polycarbonate without problems.

    David
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    willte
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    Re: willie skipjack no2

    Post  willte on Thu Dec 19, 2013 10:47 am

    where do you get your blanks from david
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    Re: willie skipjack no2

    Post  david f on Thu Dec 19, 2013 12:12 pm

    I have a large sheet of 6mm "smoked" tinted polycarbonate sheet which I found by the bins at the flat I used to live in. (I think it was probably used as a security screen somewhere. No, I didn't take it during an armed robbery!)

    I bond 3 layers of this together using Plastic Weld. (Drizzle the solvent on and quickly clamp it up. Best done outside.)

    Let it mature for a day and you have a good thick blank which is good for end caps.

    I'm sure you can buy thick polycarbonate but it will probably be expensive. Polycarbonate is my favourite material for lots of things - incredibly tough but easy to machine. I used to to have trouble cutting it with power tools - the cut sticks back together. Following Nigel's suggestion I now use one of new generation (and quite cheap) handsaws. An 11 teeth per inch (Stanley Fat Max from B & Q) one seems to work well.

    David

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    willte
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    Re: willie skipjack no2

    Post  willte on Thu Dec 19, 2013 4:38 pm

    ever tried Vaseline when cutting it nothing sticks to it , and wipe it clean with white spirit or paint thinner
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    willte
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    Re: willie skipjack no2

    Post  willte on Thu Dec 19, 2013 5:48 pm

    motor and gearbox
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    Re: willie skipjack no2

    Post  Tom(ADMIN) on Thu Dec 19, 2013 6:10 pm

    End caps by MMB?
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    Re: willie skipjack no2

    Post  nigele(ADMIN)2 on Thu Dec 19, 2013 6:14 pm

    Just a word off warning Guy's,if you want to cut poly wet just use soapy water and a course blade,don't use thiners on poly it will attack it and over time it will craze,the same applies to thread lock(loctite etc).
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    willte
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    Re: willie skipjack no2

    Post  willte on Thu Dec 19, 2013 7:00 pm

    that where I got them the same type that in the sea wolf, had a look in e-bay but what a price,but £10 for two at MMB

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