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Scratch Build Project 685 Plavnik K-278 Komsomolets NATO: Mike

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  • Scratch Build Project 685 Plavnik K-278 Komsomolets NATO: Mike

    Wow what a mouthful of a name.

    It's only been 6 months approximately that I finished building the Resolution class SSBN and once again the building urge has struck and once again I have an affliction for the less well known (read hard to get info on) type of boats. Well this one is in that category. She didn't even see the fall of communism. Currently dock.: Bottom of the Norwegian sea.

    It's been about 15 years since I built a Russian Boat. I built an Akula from scratch when I was just starting and didn't really know what I was doing. I have a better idea now.
    I always though that If I were going to do a Russian boat it would be something a bit different. Every one seems to do Akulas, typhoons, Alfas, Oscars and the odd kilo. I thought I would buck the trend. actually this boat is probably easier from an overall shape viewpoint. Her hull is a consistent diameter for a large percentage of it. It's almost an American thing. However that's where the easy bit finishes, Being a one off boat and one that only ever operated under communism meant that info is a little scant.

    So anyone out there more pics than the ones that come up on the internet all the time would be great. I'm sure that there is a dilapidated old filing cabinet in Severodvinsk in some restricted naval building with a treasure trove of photos of this boat. You would think that with the fall of communism in 1991 that getting hold of pre- 1989 pics of this boat would be a bit more common. There must be construction photo's somewhere?

    VIEWER ADVISORY WARNING: FOR HWSNBN.: Contains wood.

    Anyway I've got some good plans and made a start. I have turned up the bow and stern sections on a lathe and have stuck them to a pvc pipe. As mentioned earlier this sub has a consistent diameter for most of its length, this makes it easier. Not a body of evolution like Skipjack, Alfa, Albacore or Akula. More like Los Angeles actually. This boat should not be as complex as the Resolution class. there is no missile deck and there is no complex bow section like the R class that was very subtle and was make or break for the model. I am anticipating that this boat should be a faster build but I will take my time once again and use it as a learning exercise to improve the art.

    Enough for now. I will go into more detail on starting the masters soon and the slow build up.



    Standing by for Tirade about wood from that 'Jorgensen' bloke.

    david h

  • Peter W
    replied
    Jealous David, very jealous.

    Peter

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  • Davidh
    replied
    Hello All,

    Photos from the 2017 Gosford sub regatta. She had an encounter with HMS repulse.

    Enjoy.


    David H

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  • Davidh
    replied
    Thankyou Lads,

    This model exhibition is about 80% model trains ,with some plastic Cars and model boats thrown in.My display is next to a shallow pool. I had to negotiate with the club that run their boats in the
    pool because last year I caused ' damage.' Even though they were running over me. Anyway smoothed it over this year and run the boats again. Lots of kids saying 'Daddy/mummy look, a submarine'.

    Always good fun

    David H

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  • trout
    replied
    David,
    Good for you, getting out there and promoting r/c submarines!
    i agree with Peter, beautiful models indeed.

    Leave a comment:


  • Peter W
    replied
    They're beautiful models David. Shame it is so dark in there.

    Peter

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  • Davidh
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    Newcastle 'Our town model show' last weekend.

    Mike and Borei

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  • Davidh
    replied
    Finally moved in to new house and has swimming pool. It's mid April and mid autumn but you wouldn't think so, still shorts weather
    Have taken the opportunity to trim and balance the Komsomolets and unleash her in the pool Here are some
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    pics....
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  • Davidh
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    Hello all,


    I have spent the last couple of months getting the Bow of resolution just right and then re tooling it. I then started producing a couple of kits as there was a model show coming up that I thought I would attend as an exhibitor.


    The 'Our town hobby show" happens in Newcastle every year around August. I have been going for several years now and found it mildly interesting but frustrated that it is mostly trains, trains, trains and maybe the odd boat , did i mention trains? they've never had someone do subs before. There is usually a disply by Task force 72 and then there is the Newcastle Maritime modellers who have a shallow pool that they run some boats in. So I planned to have my stall next to them to show of my collection and advertise the two kits that I have on offer, Resolution and Mike. My stand was pretty much next to the pool so I could even stand at my display and run my boat from there.


    The show runs over a weekend so set up was on friday afternoon. Saturday morning got busy. I ran the resolution and Mike a couple of times , up and down the side of the shallow pool about 200mm deep. So rubbing on the bottom at periscope depth. The commentary on the side of the pool was constant." look daddy a submarine", check out the submarine! does that thing dive? Can you make it sink? I did'nt know model subs existed." Plenty of conversation and many business cards taken but no sales of the kits.

    Sunday was similar, Running the Mike and getting run over by King George V. Running the Resolution and getting run over by King George V. It was alot of fun. I tried to get in front of KGV because it was so big and it's thrust was significant, I often found I got blown sideways by the turbulence from this big WW2 battleship. There were some really tiny tugs pushing the bigger boats around. I should have surfaced under one of them and given it a taxi ride somewhere.


    It's been two weeks now and although several people said they were very interested in my kits no one has bought anything. Plenty of train stuff bought but in the last two weeks not so much as an email from anyone. The response has been somewhat Underwhelming.


    This has been the first real run of Mike and I think she looks really nice in the water.
    Anyway.....
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    Enjoy the pics.

    David H

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  • Slats
    replied
    Nice one David... I agree mate, I despair at the world we have - a product of instantaneous gratification made all too easily through e-media technology. Parents should be the gatekeepers to kids activities, but how can they be when they themselves are so obsessed too with the same issues??. I refuse point blank in my house to have cabal TV, or any computer games. My kids pestering can be resisted and the substitutes I have given them technical lego, model construction, and fresh air activities is winning, but its a hell of a battle. Its harder for girls but I am impressed with my 11 year old daughters interest in model rail construction and interest in how things work. It just takes consistency and effort, and I am by no means perfect, but I acknowledge that my view is RARE!

    Industrial arts "shop" teachers are treasures of the school system, and sadly the school system here in Australia simply doesn't get the value of it. If kids are given the ability to problem solve in areas of interest - the boundaries of what they can learn are endless. The applied application of problem solving in the workshop is directly transferable to many different vocations that have nothing to do with the labours of craftsmanship. The "shop" teaches applied math, expression, communication, and above all develops creative strategic thinking.

    Jame's who's 8 helped layout the internals of my 3" subdriver last weekend. He spent three hours in the shop with me learning and experimenting with how it works. He wants his own model submarine and when David gets off his arse and finishes Albacore it will be so. At every stage in the shop he was getting lessons in math and spelling and deductive reasoning. The fact that this learning in his mind was "play time" is a bonus.

    Back to your boat - better than anything I've done with subs, which is conversion and construction at best. You are a true builder - keep going you are improving all the time.

    Best

    John

    Leave a comment:


  • Davidh
    replied
    Hello all,

    I took the Mike to school today. I have been making the odd attempt at trying to snare the next generation of model makers and give them some inspiration.

    I told year eight after doing aeronautics in our mandatory technology class for the last 10 weeks that I would show them what else I build in my spare time. Took my mike class and put it into the room before class and had some year 10's follow me in asking questions. It was a good show and tell for about 10 minutes before the start of their classes. Most were amazed that you could make a sub RC and the inevitable question about camera's also came up. I don't know if anyone else has found this but I have never been asked 'what class of sub is it?'
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    So I showed year 8 and got some really good response. Tried to explain too them that there is more to Industrial Arts, Woodwork and metal work that just making pencil boxes and candlelabra.. I tried to impress upon them that you gotta love problem solving if you want to get into this caper and building them takes more than 5 minutes........

    I was also told by a colleague that I should take the contract for the new subs and save the government some money. What I could do with 50 billion....


    Dave H

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  • Davidh
    replied
    Hello All,

    With the bottom mould created and the propeller in place the vents arranged, the upper mould could be created by pouring silicon into the PVC pipe that makes the outer part of the mould. when the mould was cured it was simply a case of pulling the mould from the top and then cleaning out the clay that created the pouring spout. Removing the two brass sprues and then extra brass rods out the sides for the air vents.

    Once this was done and the overall mould cleaned and trimmed of excess silicon then a spray of Polyurethane release agent would them make the moulds ready for use. As mentioned I am in the process of getting hold of some vacuum equipment to rid the urethane mix of air bubbles. In the meantime I have to be careful how I go about a pour to minimise the amount of bubbles that form. We have had very humid and hot weather lately. Sydney gets very hot in January - February as summer finishes off however we have had very hot weather (over 30 degrees) up until about a week ago and it's march. We should be well and truly into autumn. Sydney also gets very humid and this plays havoc with polyurethane moulding. It starts bubbling up almost immediately. Don't cast polyurethane in humid conditions.

    So I timed my casting weather to minimise my incidence of bubbling. After pouring and letting cure it became evident that I would need to increase the numbers of vent holes. the air bubbles were congregating along the top of the blades at the highest point on the moulds. So Drilling some extra holes along the top edge of the blades and certainly minimised the number of bubbles it has however created some little sprues that you need to cut out.

    Once both the propeller parts are removed from the mould I can lightly sand them down and screw them onto a shaft. The slight flex in the urethane allows the blades to give a little as they but up against each other as you wind them together until a 45 degrees relationship is met.

    David H


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  • Davidh
    replied
    Thankyou David,

    Once again at it but at the tail end of this task. The two sets of four mould pieces have been created and the first moulded parts have come out.
    As mentioned this propeller is a two piece proposition which means that four mould halves will be needed. These moulds are a first for me as I have never moulded a round mould shape and never created a mould with the pour vents in the middle of a mould and not split down a part line. This will be a little different. Also the propeller is probably the most complex shape that you could mould so 'I have intently looked at how HWSNBN does things and effectively copied it.

    So I have taken a plywood board and drilled a hole in it to place the M4 metric thread that will be the prop shaft. Insert bolt up from underneath and into underside of the propeller hub. Screwed the propeller down onto bolt until tight against surface. It is key that at this stage the bolt sticks up a little so that the mould will take the bolt profile for later on as the bolt would eventually act as an insert. Once done I would take some modelling clay and place around underside of the blades. The clay is packed up underneath each blade as it angles upwards. The clay is then angled away and down at about a 45 degree angle so that It makes a triangular profile. I extended this triangular profile out form the blades to where it would connect with the PVC pipe that would create the boundary of the pour. I then placed little brass inserts along the ridge of the clay just touching the tip of the blades and heading out towards the perimeter. These tiny little brass rods would mould the channels for air vents out side ways and would split easily with the mould line.

    Once the clay was moulded around the prop then I drilled register holes all around the rest of the flat base. I also placed a further piece of clay down to create a unique point of reference so that I can easily align up the two halves because they kind of look similar. After this all that remained was the pour and wait.

    Once the first mould side is done then I wold need to look at developing the pouring vents. Having never made a prop mould before would take a little time working out the vent / pour arrangement. This intricate shape really would be a nightmare for air bubbles. The lower photos show the first half mould complete and the arrangement for the pouring vent and an air vent. I had to glue small brass tubes to either side of the back of the prop hub. At the top of these tubes I places some tapered clay. As the second mould is poured the silicon would rise up along the brass vents and around the tapered clay, when set these clay bulges would act as funnels allowing the fine dribble of polyurethane to easily flow into the mould.

    David H
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  • He Who Shall Not Be Named
    replied
    Not a bad looking propeller there, Dave. You're learning. If you stick with this Craft you'll eventually accumulate the tools needed to match your ever growing talents. Keep at it. You are tenacious!

    M

    Leave a comment:


  • Davidh
    replied
    Thanks for the write up David,

    Learned a lot from that. I have yet to set up a drill / grinder set up at an angle to do the slots for the blades like what you have done there. In a week where I was focussed at least in a model sense on getting the propellers for the mike done, However, I got all fired up to re-tool the Resolution after seeing some efforts done on a 1/96 resolution over at the Subcommittee website. There is a really nice Resolution class taking shape over there and it's inspired to me to address some of the issues that I've discovered with my own...

    Anyway back to the prop. The jigs that I turned up on the lather have been excellent. I then turned up two brass bosses, one, the inner shorter one for the inner screw and the outer one with the longer stators attached. Attached a centre drill into the live tailstock and drilled a 3.5 mm hole. then placed an M4 tap in the tailstock and manually turned the lathe chuck onto the tap to create a nice 4mm thread for the prop shaft. Worked well.

    Then it was time to mark out and cut the angled grooves for the blades to slot into the boss. This was marked up and carefully done with a hacksaw. I know I need a proper set up and eventually will get something up and running. Once this was done it was simply the case of putting all the blades and boss into the jig and soldering. It has taken me a while to get the hang of soldering like this. the right solder makes a difference and with a clean soldering iron and the right temperature it was staring to flow. I am still not great at soldering and there would be the need for some sanding and filing here and there. Eventually when I am happy I will look into the making of the silicon moulds for these two props.

    David H

    Leave a comment:

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