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Author Topic: U.S.S. Nautilus scratch build  (Read 28827 times)

Dr.Schmidt

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U.S.S. Nautilus scratch build
« on: August 11, 2015, 07:58:26 AM »

Hi,


my name is Andreas, I'm from Germany, big time submarine enthusiast, and I started to build the U.S.S. Nautilus SSN-571 a while ago. I've posted this build in some other forums as well, but I thought it might be interesting for here as well.......comments, criticism and help are always welcome.

So that is the early stage of the CAD design:
 



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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #1 on: August 11, 2015, 08:00:11 AM »

The basic concept with piston tank (blue and LiFePo battery (red):



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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #2 on: August 11, 2015, 08:01:52 AM »

Detail work:








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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #3 on: August 11, 2015, 08:02:58 AM »

Milled pre-forms for the mould build:















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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #4 on: August 11, 2015, 08:03:42 AM »


Propeller design....





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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #5 on: August 11, 2015, 08:04:12 AM »


That's about how I envision the upper part of the sail....


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #6 on: August 11, 2015, 08:04:45 AM »


A glance into the living resin & glass fiber hell.......


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #7 on: August 11, 2015, 08:05:34 AM »


More concept work.....this time the anchor:


Original:
https://c1.staticflickr.com/3/2549/3953530408_1ebf3b2d4f_z.jpg


CAD:




And on the boat.....


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #8 on: August 11, 2015, 08:06:14 AM »


First tool done....upper half of the bow:









More mould making mayhem


bow - lower half:



bow complete:



deck - main mould:
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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #9 on: August 11, 2015, 08:06:37 AM »


The last milled pre-forms. The conning tower....




And the rudders:
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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #10 on: August 11, 2015, 08:07:09 AM »


Right in time for Christmas I got a big package full of 3D-printed parts:


Propellers  - turned out really good, even the profiles. Excellent for only 28 mm diameter.






Stern bulkhead - notice the 7° kink for the tilted prop axis:




deck hatches:



Sail cover, bridge, mast housing and small parts like periscopes:









That's going to be plenty of work to make moulds for all these parts.....
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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #11 on: August 11, 2015, 08:07:53 AM »


The first mould for the stern section:








Actually it's two moulds, as there will be a service hatch here:








Now I have to take an involuntary break.....I ran out of glass fiber
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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #12 on: August 11, 2015, 08:08:18 AM »


O.K., the upper half of the stern mould is done as well:


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #13 on: August 11, 2015, 08:09:10 AM »


One can already guess from the pictures above....it's going to be tight in the stern section:




Really not much space in the stern section, but just enough to get conventional hook ups in there:




The bow planes are not quite trivial, too. Right now I plan to keep them fixed. The whole alignment will be done with a single bulkhead:





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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #14 on: August 11, 2015, 08:09:50 AM »


Small update. The moulds for the hull are done and only minor adjustments have to be added. The moulds for the sail will be ready by end of the week...hopefully. And to avoid boredom, I've started to fabricate the silicone moulds for the smaller pieces. All cast in PU resin:




top of the sail, mast support, bridge, sonar dome, hatches etc.





Hatches:



And again the lid of the sail:
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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #15 on: August 11, 2015, 08:10:07 AM »


Well, the moulds for the sail....done.


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #16 on: August 11, 2015, 08:10:27 AM »


The design is getting close to finalization as well.....
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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #17 on: August 11, 2015, 08:10:51 AM »


The first sail is out of the mould. Not that bad and the resin-cast cover fits quite perfectly:








The moulds for the aft control planes are ready as well:


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #18 on: August 11, 2015, 08:11:10 AM »


The bow:








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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #19 on: August 11, 2015, 08:11:41 AM »

Interior design:


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #20 on: August 11, 2015, 08:12:22 AM »


First set of milled structure parts arrived and it looks quite good:





And as I had the pleasure to spend last week sick at home I tried what my CAD offers in terms of making sketches for build instructions…...looks good:


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #21 on: August 11, 2015, 08:12:44 AM »


Even if it doesn't look like it.....this is going to be the mould for the rear bulkhead:


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #22 on: August 11, 2015, 08:12:59 AM »


This will be the motor feed through of the Nautilus. Basically it's an advanced version of the ones I have in my U-1. Took a while to find a workshop that is now doing the parts. I guess I'll make some more.... The parts will be made of bronze and brass, it will have a ball bearing and an ID 4 mm rotary shaft seal. It will be attached to the rear bulkhead via a simple M16 fine thread and sealed via an o-ring. Advantage: only one hole in the bulkhead, no additional holes that have to be sealed. And it saves so much space in your boat....


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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #23 on: August 11, 2015, 08:13:20 AM »


And the first half of the mould for the rear bulkhead...
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Dr.Schmidt

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Re: U.S.S. Nautilus scratch build
« Reply #24 on: August 11, 2015, 08:13:37 AM »


The moulds for the rear bulkhead are done...



And the first part has turned out quite nicely. Notice the round flat surfaces that will help to seal the motor fedthoughts.


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