SB-90 1/10 Scale

This is the building forum for the Combat Boat 90. If you are interested in the STL's for this project, they are available to those who help me by contributing 15 Euro. Then you get access to a sub-forum where STL's, instructions and mods are located.
Matsa
Posts: 32
Joined: Tue May 22, 2018 10:46 am

SB-90 1/10 Scale

Postby Matsa » Tue Jun 19, 2018 8:53 am

Hi Guys!

I found this amazing 3D model to get and i just have to make it in scale 1/10.
Printer i'm using is the Tronxy X5S with a 400x400x400 Build area.

I have started with some parts.

So faar i printed some parts of the waterjet, just intakes left.
The updated cabin parts is almost done, midsection is printing at home right now :lol:

Having problem with pics now but i will put up some as soon i get it to work if interesting.

Matsa...

Matsa
Posts: 32
Joined: Tue May 22, 2018 10:46 am

Re: SB-90 1/10 Scale

Postby Matsa » Tue Jul 24, 2018 2:46 pm

Some pics of my progress so far.

Image
The engines i plan to use will run on 6cell and is at 1200 Watt each with 5mm shaft.

Image
Parts for the waterjet. Impellers are already balanced :lol:

Image
Battlestation parts, the barell is made out of carbontube.

Image
Cabin with radar parts, ofcourse i will make it rotate :)

Image
One of the nozzles. Theres a stanless steel bearing in the center with 5mm id.

Image
Time to print bigger parts, i started with the hull.

Image
This boat gets huge, the Jas Gripen on the floor behind the hull is also scale 1/10..

More to come later on.

Matsa...

admin
Site Admin
Posts: 429
Joined: Thu Jan 11, 2018 7:46 pm

Re: SB-90 1/10 Scale

Postby admin » Mon Jul 30, 2018 6:22 pm

Oh that's huge! :D thanks a lot for the pictures, can't wait to see it in action! :D

Matsa
Posts: 32
Joined: Tue May 22, 2018 10:46 am

Re: SB-90 1/10 Scale

Postby Matsa » Sat Aug 04, 2018 12:47 am

I just printed a mod for my printer and after 2 hours printing i see a big difference, much smoother.
Original on the X axis there where bearings with plastic pressed on them and it was a little wiggly.

It's supersteady so i hope it lasts for a while, right now i'm printing half the third piece of the hull.
So more pics to come 8-)

Image

Image

Matsa...

Kjell
Posts: 19
Joined: Sat Jan 13, 2018 7:23 pm

Re: SB-90 1/10 Scale

Postby Kjell » Sun Aug 05, 2018 4:48 pm

my 1:12
IMG_0007.JPG
IMG_0007.JPG (7.51 MiB) Viewed 21079 times

Matsa
Posts: 32
Joined: Tue May 22, 2018 10:46 am

Re: SB-90 1/10 Scale

Postby Matsa » Sun Aug 05, 2018 7:35 pm

Looking awesome Kjell!

I'm just about to start nr 4 on the hull, half of nr3 took 45 hours :shock:
Keep them pics coming 8-)

Matsa...
Kjell wrote:
Sun Aug 05, 2018 4:48 pm
my 1:12

IMG_0007.JPG

Matsa
Posts: 32
Joined: Tue May 22, 2018 10:46 am

Re: SB-90 1/10 Scale

Postby Matsa » Fri Aug 10, 2018 5:44 am

Some more progress

Made an enginemount by drawing ontop of frame 4 so it fits my own engines.
Image

Added rear mounts for the engines aswell.
Image

Parts of the hull is glued together now 8-)
Image

More to come..

Matsa...

admin
Site Admin
Posts: 429
Joined: Thu Jan 11, 2018 7:46 pm

Re: SB-90 1/10 Scale

Postby admin » Fri Aug 10, 2018 10:31 am

At step -100mm from centerpoint.PNG
At step -100mm from centerpoint.PNG (72.36 KiB) Viewed 21002 times
I did a quick analysis of the hull in the CAD with a 2,2 times size magnification (which should be the one you use if I'm not mistaken).
Right at the step, the submerged water volume equals 9,2kg.
10mm below step 110mm from centerpoint.PNG
10mm below step 110mm from centerpoint.PNG (59.45 KiB) Viewed 21002 times
If water line is lowered 10mm below the step, the displaced water equals 6,2kg
10mm above step 90mm from centerpoint.PNG
10mm above step 90mm from centerpoint.PNG (53.52 KiB) Viewed 21002 times
If water line instead is 10mm above the step, you're almost at 13kg.

This means that you have plenty of room for massive reinforcement like glass fiber coating etc. I presume your equipment will not weigh more than 3-4kg at most, so with an additional 4-5kg construction weight, the water line would be just fine, and given this above it's not that sensitive to a weight increase.

Edit: I found a picture including the water line. Looks to be even a bit above my heaviest analysis example, so I think you should be at 13-14kg for a really realistic water line. Adding some extra weight with together with all that power will also make for nice wakes and probably a really nice spash when doing a crash stop, can't wait to see that! :)
waterline.PNG
waterline.PNG (53.95 KiB) Viewed 21001 times

Matsa
Posts: 32
Joined: Tue May 22, 2018 10:46 am

Re: SB-90 1/10 Scale

Postby Matsa » Sat Aug 11, 2018 2:11 am

Sweet :mrgreen:

Then i dont have to be afraid of making it to heavy, and it makes the built much easier :lol:

Yes i change the slicer scale from 100% too 220% to get close to scale 1/10.

But still i try making parts on deck and above more lightweight, because i think its better to add weight
at the bottom of the hull then above it ofcourse.


Matsa...

User avatar
nitewatchman
Posts: 9
Joined: Thu Aug 02, 2018 1:10 am

Re: SB-90 1/10 Scale

Postby nitewatchman » Mon Aug 13, 2018 5:34 am

Out of sheer curiosity, what engines are you using?

I am thinking of a 1/12th or 1/15th scale boat. I have delta printers and the biggest is 300mm diameter and 550mm tall. The outer is slightly smaller at 280 mm and 400mm tall.

Also what do you have in mind for cooling pumps?

gary


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