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Author Topic: GRANIT - 1/50th scale AHTS  (Read 25406 times)

hama

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Re: GRANIT - 1/50th scale AHTS
« Reply #25 on: December 18, 2015, 07:48:16 AM »

I'm also following this with great interest, your off to a good start for sure! :-))
Keep the pictures coming!
Hama
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #26 on: December 22, 2015, 05:06:21 PM »

Thanks for the encouragement chaps.


Did a bit more 3D work on the KORT set up, rather than try to make something that would take ages and not look right, I decided to go down the 3D printing route and this would cost 40+ from shapeways. Has anyone had good results using them/this type of product for KORT nozzles?



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Steve Mahoney

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Re: GRANIT - 1/50th scale AHTS
« Reply #27 on: December 22, 2015, 07:26:20 PM »

I've had some nozzles made from what they call 'strong, white, flexible'. The finish is a little rough and you need to wipe it over with acetone which smooths the surface.
Not sure if they are robust enough to take any knocks as bits at the bottom usually do. If you have some support below them they might be fine.
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Umi_Ryuzuki

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Re: GRANIT - 1/50th scale AHTS
« Reply #28 on: December 23, 2015, 03:49:08 AM »

What size Kort do you need?
There are a couple sizes of Kort nozzles here.
http://www.shapeways.com/shops/davidsohlstrom


 :-))


Or are you printing that whole set up?
Should print pretty well in Strong flexible to frosted detail.

derekwarner_decoy

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Re: GRANIT - 1/50th scale AHTS
« Reply #29 on: December 23, 2015, 04:01:06 AM »

Interesting material nomination from Shapeways Umi............. %)... Derek
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Umi_Ryuzuki

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Re: GRANIT - 1/50th scale AHTS
« Reply #30 on: December 23, 2015, 07:43:24 AM »

Interesting material nomination from Shapeways Umi............. %) ... Derek


That one is also a 6 inch diameter nozzle.  :o

bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #31 on: December 23, 2015, 09:39:23 AM »

Hi Umi,


They are designed to accept 60mm Kort props and are 130mm between centres, my idea was to have it printed as one unit, the horizontal fin will be fitted through the keel and the vertical fins would be cut to fit between frames then glued in place once all aligned. The 3D printing route was for accuracy, I was thinking of fabricating it from brass, but the braizing process may add distortion. The only other way would be to use some sort of PVC, fabricate each part then build it up like an Airfix kit, as long as the prop shafts are aligned and solid, work from them????
I have got a few days to mull it over................................ :-)) :-)) :-))


Stewart
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Umi_Ryuzuki

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Re: GRANIT - 1/50th scale AHTS
« Reply #32 on: December 23, 2015, 08:10:57 PM »

Since it is all connected, it is considered "one part".
I would play with the volumes, and see if there might be a way to arrange
the parts to reduce the volume, and then connect them to each other with sprues.
That way they may still get by as "one part". See if that can save some cost.  ok2

Mark T

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Re: GRANIT - 1/50th scale AHTS
« Reply #33 on: December 23, 2015, 08:30:02 PM »

I remember fitting the Korts to my build that were non - standard.  The set up took me hours but the end result was well worth the effort. 


If I could have asked a company to print me a set that I had designed that fitted exactly the way I wanted I would of happily paid 40 for them.


That would have only cost me 23.50 than the set I bought - A bargain when I consider the hours spent fettling the ones I did buy.
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #34 on: December 24, 2015, 11:53:23 AM »

Umi. you are right, a bit of work and I can reduce the cost by nearly 10, pays for the P+P................. :-))


Mark, experience always prevails and yours has pushed me toward ordering this set up in the new year.


Thanks once again for your help.


Have a very Happy Christmas and New Year


Stewart
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boatmadman

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Re: GRANIT - 1/50th scale AHTS
« Reply #35 on: December 26, 2015, 10:13:51 AM »

Great work.
Just a comment, when having shapeways make up the korts, if you haven't already done so, allow for a bearing sleeve in the kort center for the prop shaft to run in.
Ian
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #36 on: December 26, 2015, 12:26:23 PM »

Ian, the end of the propshafts, should fit snuggly into the centre bearing of the KORT if all my calculations and CAD drawings are correct...........................sitting with all fingers crossed.......................thanks for the pointer though, always good to hear other peoples points of views and ideas/suggestions.


Stewart
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #37 on: January 05, 2016, 12:10:37 PM »

Well, I decided that no matter how long I look at it and how long I decide how to do it I started planking the hull. This is the first time I have done this and I have no idea how to do it so after reading umpteen thousand threads and videos, hey presto, it's not that hard, well so far!!!!!! I am using a combination of Obechi strip and ply to plank it, easy flat bits and bulwarks using ply and the rest Obechi strip, I did find it fairly easy to get these first five strips on, with a bit of feathering along the edges they seem to sit nicely against each other, a few stealers need to be inserted but that shouldn't be to hard. See how it goes and if I get into bother I shall be calling for help................... :-))


Thanks for watching.


Stewart



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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #38 on: January 05, 2016, 12:14:09 PM »

I forgot to mention I am using tiny brass pins with aliphatic resin glue to stick them down in case you are wondering why there very few clamps in the shots.............fiddly little buggers!
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Unsinkable 2

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Re: GRANIT - 1/50th scale AHTS
« Reply #39 on: January 05, 2016, 08:53:16 PM »

I did my planking the same way as you. I watched a ton of YouTube videos and then did it my own way! O0


As long as the end result is good strong smooth and watertight then alls well that ends well. U2
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Umi_Ryuzuki

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Re: GRANIT - 1/50th scale AHTS
« Reply #40 on: January 05, 2016, 09:19:22 PM »



I am always cutting the ends of the planks to taper so I avoid gaps.
But I still somtimes end up with a short wedge to fill in somewhere.
 O0

ballastanksian

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Re: GRANIT - 1/50th scale AHTS
« Reply #41 on: January 06, 2016, 11:36:01 PM »

Another very attractive build Stewart! CAD drawing frames does seem to be the way to go.

I will keep an eye out for progress.
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #42 on: February 09, 2016, 11:04:57 AM »

Well I have managed to get to the stage of filling, been hard work but it has turned out not bad, even if I say so myself. I shall let the pictures tell the story.


Thanks for watching.


Stewart



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Re: GRANIT - 1/50th scale AHTS
« Reply #43 on: February 09, 2016, 08:21:14 PM »

Excellent planking :-)) 
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hama

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Re: GRANIT - 1/50th scale AHTS
« Reply #44 on: February 10, 2016, 08:44:45 AM »

Nice hull!
Good work with the planking.
Hama
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Re: GRANIT - 1/50th scale AHTS
« Reply #45 on: February 10, 2016, 11:27:45 PM »

Amen :-))
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #46 on: February 11, 2016, 02:34:17 AM »

Thanks for the compliments chaps....... :-))
After a few hours of rough sanding she is smooth enough for the first bout of filler to go on, then more sanding, and more filler and more sanding................................... {:-{ {:-{ {:-{ {:-{ {:-{ {:-{
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Re: GRANIT - 1/50th scale AHTS
« Reply #47 on: February 14, 2016, 07:15:47 AM »

Sanding filling sanding....... Exactly what I'm up to this weekend, I disappear into my garage and come back full of dust. My OH thinks I'm mad........... At least I'm not the only one {-)    U2
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #48 on: February 14, 2016, 10:53:40 PM »

Too bloomin' cold to put filler on, its about -1 in my garage at the moment!
Decided to tackle stern end instead, easiest solution I think is to glue blocks of balsa together, then sculpt it to shape then glue it to the deck, then I can tackle the bulwark rails. Not looking forward to that as lots of fiddly bits to make and fit, cold sausage fingers are not ideal............ %%
I did manage to get some more pictures of the Granit so these are going to help with the build and also some of her sister ship Bazalt in dry dock, helpful for Kort set up and stern as she is slightly different from the drawings I have worked from, nowt major thank goodness.

Ta for watching, will post more pics of progress when my fingers thaw out!
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #49 on: March 17, 2016, 05:17:10 PM »

Been a while but have managed to make a bit more progress.
Bow Thruster purchased and installed.
Hull filled in and sanded several times and is now smoother than a baby's bum.
Exit holes for prop shafts cut out.
Fibreglass cloth and finishing resin ordered and delivered.
Lots of shiny bits ordered and delivered, only had one propshaft on stock so waiting for delivery of the second from another supplier.
Bulwarks drawn and ready to go off for laser cutting.
Kort nozzle set up being 3D printed bt Shapeways as we speak.

Now to coat the inside of the hull with resin and then glass the exterior!!!!!!!!!!!!!!



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