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    Germany's first military submarine, the S.M. U-1

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    Dr.Schmidt
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    Post  Dr.Schmidt on Wed Mar 20, 2013 1:56 pm

    I'm currently building Germanie's first military submarine, the S.M. U-1 from 1906.

    Germany's first military submarine, the S.M. U-1 U1l

    The model is based on the only existing overall plan.

    Germany's first military submarine, the S.M. U-1 Plans_U1

    I didgitized it, scaled it, and based on the drwaings I created a 3D CAD model, which is the basis for my model:

    Germany's first military submarine, the S.M. U-1 U-1

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    Post  Dr.Schmidt on Wed Mar 20, 2013 2:16 pm

    Based on the CAD drawing I got begative moulds milled out of hard foam. These negatives I used to build a positive out of glas fiber composites.

    Germany's first military submarine, the S.M. U-1 DSC01152

    Germany's first military submarine, the S.M. U-1 DSC01177

    Germany's first military submarine, the S.M. U-1 DSC01178

    Germany's first military submarine, the S.M. U-1 DSC01181

    Germany's first military submarine, the S.M. U-1 DSC01182

    Germany's first military submarine, the S.M. U-1 DSC01183

    After the cutring of the resin, I basically cut and grinded the foam of the positive. Here the lower hull:

    Germany's first military submarine, the S.M. U-1 DSC01192

    Germany's first military submarine, the S.M. U-1 DSC01197

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    Post  Dr.Schmidt on Wed Mar 20, 2013 2:21 pm

    Same procedure for the upper hull:

    Germany's first military submarine, the S.M. U-1 DSC01193

    Germany's first military submarine, the S.M. U-1 DSC01196

    Germany's first military submarine, the S.M. U-1 DSC01205

    And the result - the still relatively crude positive model:

    Germany's first military submarine, the S.M. U-1 DSC01207

    Germany's first military submarine, the S.M. U-1 DSC01215

    The mould for the conning-tower I did before based on a positive model I got fabricated via rapid prototyping.

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    Post  Tom(ADMIN) on Wed Mar 20, 2013 2:28 pm

    Very nice indeed, sir...
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    Dr.Schmidt
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    Post  Dr.Schmidt on Wed Mar 20, 2013 2:40 pm

    Thanks!

    After I got the raw positive, lots of grinding, sanding, filling, and finally painting and polishing got me here:

    Germany's first military submarine, the S.M. U-1 DSC01241

    Germany's first military submarine, the S.M. U-1 DSC01243

    Germany's first military submarine, the S.M. U-1 DSC01244

    Germany's first military submarine, the S.M. U-1 DSC01245

    Then came the nasty part - building the moulds:

    Germany's first military submarine, the S.M. U-1 DSC01269

    Germany's first military submarine, the S.M. U-1 DSC01274

    Germany's first military submarine, the S.M. U-1 DSC01279

    Germany's first military submarine, the S.M. U-1 DSC01290
    70 kgs of them actually...
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    Post  Dr.Schmidt on Wed Mar 20, 2013 2:43 pm

    Three months of work, but they turned out really good:

    Germany's first military submarine, the S.M. U-1 OhneTitel

    Germany's first military submarine, the S.M. U-1 DSC01300
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    Post  tattooed on Wed Mar 20, 2013 7:01 pm

    what a fantastic skill you have keep up the great work
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    Post  profesorul on Wed Mar 20, 2013 7:20 pm

    That's "REALLY OW SOME" like he Americans sad.

    Is Really Great what You have don.So Much effort but is worth it.
    Please keep as on post with your work.

    MARIUS

    P.S. How many Kilograms of Silicone Rubber did You used?!...60-75KG!!!.
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    Post  Dr.Schmidt on Wed Mar 20, 2013 8:23 pm

    The moulds for the hull weigh about 70 kg. They are made out of resin and glass fiber.
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    Post  profesorul on Wed Mar 20, 2013 8:27 pm

    SEE I have a GOOD eye!.
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    Post  Dr.Schmidt on Wed Mar 20, 2013 8:32 pm

    After the moulds were done, I made the first glass fiber parts for the actual boat. The conning tower:

    Germany's first military submarine, the S.M. U-1 DSC01303
    Germany's first military submarine, the S.M. U-1 DSC01304

    The upper hull with conning-tower:

    Germany's first military submarine, the S.M. U-1 DSC01306
    Germany's first military submarine, the S.M. U-1 DSC01307
    Germany's first military submarine, the S.M. U-1 DSC01308

    and the raw assembly:

    Germany's first military submarine, the S.M. U-1 DSC01310
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    Post  Dr.Schmidt on Wed Mar 20, 2013 8:39 pm

    At that stage I also had the interior design ready:

    Germany's first military submarine, the S.M. U-1 Finaldesign

    It's loosely based on the Engel VIIc interior design and works with 2 x 750 ml piston tanks, brushless motors and LiFePo batteries.
    The technical components are mounted into a frame made out of 5 mm milled thick glass fiber plates and M5 thread rods:

    Germany's first military submarine, the S.M. U-1 DSC01333_zps6d698711Germany's first military submarine, the S.M. U-1 DSC01335_zps76c25f6e
    Germany's first military submarine, the S.M. U-1 DSC01336_zps57947b38
    Germany's first military submarine, the S.M. U-1 DSC01338_zps9809c21a

    The whole assembly will be housed in glass fiber tubes sealed with bayonet coupling:

    Germany's first military submarine, the S.M. U-1 DSC01356_zpse3352840
    Germany's first military submarine, the S.M. U-1 DSC01357_zpsa7007bf5
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    Post  Dr.Schmidt on Wed Mar 20, 2013 8:45 pm

    I've also started to work on the details. Many of the small parts are 3D-pinted and are used to then I cast silicone moulds.

    Germany's first military submarine, the S.M. U-1 DSC01210
    Germany's first military submarine, the S.M. U-1 Silikon1
    Germany's first military submarine, the S.M. U-1 DSC01239

    With those parts I started the detail work - e.g. the front hatch with a small periscope:

    Germany's first military submarine, the S.M. U-1 DSC01328

    The assembly for the back snorkel:
    Germany's first military submarine, the S.M. U-1 DSC01325
    Germany's first military submarine, the S.M. U-1 DSC01326
    Germany's first military submarine, the S.M. U-1 DSC01327

    And the details on the conning tower:
    Germany's first military submarine, the S.M. U-1 DSC01342_zps68c4d6b1
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    Post  Dr.Schmidt on Wed Mar 20, 2013 8:47 pm

    Currently I'm working on the moulds for the rudders. They are based on models made of soldered brass:

    Germany's first military submarine, the S.M. U-1 DSC01344_zps8bb8c6de
    Germany's first military submarine, the S.M. U-1 DSC01355_zps38c33eb3
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    Post  Dr.Schmidt on Wed Mar 20, 2013 9:00 pm

    That's where I'm at today:

    Germany's first military submarine, the S.M. U-1 DSC01360_zps1d439e21
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    Post  david f on Thu Mar 21, 2013 9:42 am

    That is lovely work.

    How did you get the original hard foam milling done? Did it cost much?

    Congratulations on the build.

    David
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    Post  Dr.Schmidt on Thu Mar 21, 2013 10:03 am

    A friend of mine has a company that produces carbon and glass fiber products, and he has a 3D mill. I got the milling as a return for a favor. But I think it would have been comparatively cheap, as the hard foam allows high feed rates and thus costs little machine time, the foam is cheap and you have no wear on the milling tools. I had the CAD data ready for a CAM programm, so programming was also not a big issue. Milling in resin e.g. would have been very, very costly. I know, because that was the firts idea, but quotes I got were all in the 3500 Euro range. Not attractive at all.....
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    Post  david f on Fri Mar 22, 2013 1:39 pm

    It is very interesting to see how this technology works out. A pity it is still expensive.

    Would the Euro 3500 option have avoided the need for the first positive mould perhaps?

    David
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    Post  Dr.Schmidt on Fri Mar 22, 2013 2:29 pm

    Most probably yes. You can directly mill negtive moulds in resin blocks, but they are not as durable as conventional moulds that have a very hard surface due to special mould resisns.
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    Post  acrowot (Geof) on Wed Mar 27, 2013 8:13 am

    the moulds look great you must have a lot of patient,s
    i will admit i dont know much about moulding things i will need to have a lesson on how to do hydroplanes and rudders if i build the deans marines HMS Resolution
    im watching with great interest

    take care geof
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    Post  Dr.Schmidt on Wed Mar 27, 2013 11:51 am

    I do n ot have too much time to do the build, so patiece comes easy.....

    It's the first sub I build on my own, so I'm also learning allot.

    Cheers Andreas
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    Post  Dr.Schmidt on Tue Apr 09, 2013 8:59 pm

    Took three tries to get the ruder and the hydroplanes right. New moulds are often a bit tricky. But now I'm quite pleased with the results. Brass shafts and glass fiber / carbon fiber blades. Rock solid.....

    Germany's first military submarine, the S.M. U-1 DSC01415_zps8a9c99fd

    Germany's first military submarine, the S.M. U-1 DSC01412_zps0cd68287

    Germany's first military submarine, the S.M. U-1 DSC01411_zps1d192351
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    Post  david f on Wed Apr 10, 2013 8:35 am

    Lovely stuff!
    Thank you.

    David
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    Post  acrowot (Geof) on Wed Apr 10, 2013 6:41 pm

    I wish i could biuld that well looks great keep up the good work
    Geof
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    Post  Dr.Schmidt on Wed May 08, 2013 9:51 am

    O.K., slow progress, but progress.....

    The front servo will be located in a smaller tube attached to front of the main pressure tube. To be able to install and remove it, I have located it on a mount, that can be pushed over two thread rods and that will be secured by two M5 nuts.

    Germany's first military submarine, the S.M. U-1 DSC01417_zps7bb2662c

    Germany's first military submarine, the S.M. U-1 DSC01418_zps9ac8fcea

    Germany's first military submarine, the S.M. U-1 DSC01419_zpsefc38ece

    The brushless motors have watertight feedthroughs that just get mounted in the motor flange and that are secured by a M18 nut. The feedthroughs are custom made.

    Germany's first military submarine, the S.M. U-1 SKIZZE_zps4e2397e3

    Germany's first military submarine, the S.M. U-1 DSC01422_zps48e382b8

    Germany's first military submarine, the S.M. U-1 DSC01423_zpsa3e52566

    And the pre-assembly of the tower is finished, too.

    Germany's first military submarine, the S.M. U-1 DSC01424_zpse0aeca01

    Germany's first military submarine, the S.M. U-1 DSC01428_zps564da421

      Current date/time is Thu Jun 27, 2019 11:03 am