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3D printed submarine

PostPosted: Sat Apr 15, 2017 7:20 pm
by wibblywobbly
Found this on Thingiverse and decided to have a go, it's very well designed, even its not the biggest model on the planet.

http://www.thingiverse.com/thing:887573

It's bigger than it looks in the pics, and once printed, it has all of the motor mounts and internals printed in place.

Re: 3D printed submarine

PostPosted: Sat Apr 15, 2017 7:25 pm
by c.rainford73
First shrunken heads now big submarines? Will the 3D printing ever stop

Re: 3D printed submarine

PostPosted: Sat Apr 15, 2017 7:26 pm
by tomhugill
You have my attention rob!

Re: 3D printed submarine

PostPosted: Sat Apr 15, 2017 7:26 pm
by c.rainford73
I will be following this one for sure

Re: 3D printed submarine

PostPosted: Sat Apr 15, 2017 7:30 pm
by wibblywobbly
I have had both printers running all day, this is so addictive it's ridiculous! :/

Re: 3D printed submarine

PostPosted: Sat Apr 15, 2017 7:51 pm
by silversurfer1947
I hope you have a plentiful supply of filament. ;D

Re: 3D printed submarine

PostPosted: Sun Apr 16, 2017 8:09 pm
by wibblywobbly
99% of the hull done. Like an idiot I didn't look at the instructions. There are three versions in there.

1. Standard RC surface sub.
2. Static model with opening missile tubes, detailed conning tower etc.
3. Fully RC with diving planes, syringes for ballast tanks etc.

I am going for the simple version and just sail on the surface. Maybe do the planes so that I can go to conning tower depth.

The heating element on one printer gave up the ghost this morning (its a consumable on 3D printers), so I am down to one printer until the end of next week. I am thinking of using a Heng Long Motor in it, but have no idea what to power it with really, I'll print the motor mount and see what size it is. No idea which esc to use that doesn't cost a fortune either :| .

Re: 3D printed submarine

PostPosted: Sun Apr 16, 2017 8:28 pm
by silversurfer1947
How big is it? It looks about 18" long. The all singing and dancing version sounds very intereting.

Re: 3D printed submarine

PostPosted: Sun Apr 16, 2017 9:01 pm
by wibblywobbly
It's about 450mm, so not so small that it will get swamped in a pond. Should be very easy to carry about without damaging it, as long as the sections glue together ok, it will be very tough as it has a thick shell.

Re: 3D printed submarine

PostPosted: Sun Apr 16, 2017 9:19 pm
by silversurfer1947
450mm? To ancient white haired pre-metrification people like me, that's 18" ;D

Re: 3D printed submarine

PostPosted: Sun Apr 16, 2017 9:24 pm
by c.rainford73
Very nice work Mr Wibbly the full r/c version sounds very interesting You may need an industrial scale 3D printer with all of your design work

Re: 3D printed submarine

PostPosted: Mon Apr 17, 2017 12:35 pm
by tomhugill
Ooh looks like an oscar II (same class as the kursk) hopefully yours is more successful!

Re: 3D printed submarine

PostPosted: Mon Apr 17, 2017 12:59 pm
by wibblywobbly
It's this one, if that helps, though this is an early version of his design.

I'm having a problem printing the motor>gears driveshaft, I'll try it on the other printer when I get the chance.

phpBB [video]

Re: 3D printed submarine

PostPosted: Tue Apr 18, 2017 9:52 am
by wibblywobbly
Printed most of the parts, but have come across a design hiccup with the propulsion for RC. I can resolve it by designing a workaround. Dive planes and rudder are all temporarily in place.

Re: 3D printed submarine

PostPosted: Tue Apr 18, 2017 10:07 am
by silversurfer1947
Coming together nicely. I did notice that that not once in the video was the submarine under power. One thought - should the propellors counter rotate? It would prevent any torque steering.

Re: 3D printed submarine

PostPosted: Tue Apr 18, 2017 10:12 am
by wibblywobbly
If you take a close look at the video you can see that he is doing a ballast test, the sections of the hull are taped together so that he can take them apart. I just need some 3mm rods to make new shafts. You are correct about the counter rotation, one way around it is to print one propeller as a mirror image, so that it works in the opposite direction. There isn't a lot of space in there for dual motors or gearboxes. :/

Re: 3D printed submarine

PostPosted: Tue Apr 18, 2017 11:05 am
by RobW
Might be a silly question, but won't having both shafts turning in the same direction with a mirrored prop try and spin the vessel about the props? I can see a mirrored prop and counter rotating motors working.

Re: 3D printed submarine

PostPosted: Tue Apr 18, 2017 11:26 am
by Bogeyman
Love it Rob, have always admired the mystery of RC subs, have often contemplated getting one.

Looking forward to seeing this in the flesh

John

Re: 3D printed submarine

PostPosted: Tue Apr 18, 2017 11:34 am
by wibblywobbly
RobW wrote:Might be a silly question, but won't having both shafts turning in the same direction with a mirrored prop try and spin the vessel about the props? I can see a mirrored prop and counter rotating motors working.


I wouldn't doubt that for a second, it was just a wild thought. I may have to look at two small motors as a solution?

Re: 3D printed submarine

PostPosted: Tue Apr 18, 2017 11:38 am
by silversurfer1947
If you use a single motor with a toothed gear fixed to it and use this to drive two shafts fitted with the same gear you will have counter rotating props. If one prop is the mirror of the other, then both props will provide forward motion.