Model of a DPV (diver propulsion vehicle) / scooter?  

The examples you show are basically a bunch of co-centred cylinders with a number of attachments protruding on one side - quite tricky to print.

So, model the shape as usual - Tinkercad should handle it, and once imported into PrusaSlicer use the cut tool to slice it in half lengthwise, rotate the two halves so the flat is on the bed and then glue the parts together afterwards.  You will probably need to model the propeller separately in any case and attach as a last step.

This way you can more or less ignore the difficult printing aspects while designing.

Cheerio,

RE: Model of a DPV (diver propulsion vehicle) / scooter?

Thanks for the reply.

The point is that I am not skilled enough to design these. The original model shown is totally not representative of how DPVs look and I'm looking for a model that leans more towards one of the to photo's but can't find any. So not asking for help on how to print, asking for actual models.

It's really very trivial, quite good for a beginner project: Here is a quick and dirty start.

And the OpenSCAD code to produce it:

// dpv example

shroud=50;
shroudlen=30;
shroudflare=10;
flare=5;
thick=4;

bodydia=30;
bodylen=70;

propshaft=10;

$fn=100;   // smoothing

// shroud
difference(){
  union(){
    cylinder(d=shroud,h=shroudlen-shroudflare);
      translate([0,0,shroudlen-shroudflare]){
        cylinder(d1=shroud,d2=shroud+flare,h=shroudflare);
    }
  }
  cylinder(d=shroud-thick,h=shroudlen-shroudflare);
    translate([0,0,shroudlen-shroudflare]){
      cylinder(d1=shroud-thick,d2=shroud+flare-thick,h=shroudflare);
  }
}

// body
cylinder(d=propshaft,h=shroudlen-shroudflare);
translate([0,0,shroudlen-shroudflare]){
  cylinder(d1=propshaft,d2=bodydia, h=shroudlen);
}
translate([0,0,shroudlen*2-shroudflare]){
  cylinder(d=bodydia, h=bodylen);
}
translate([0,0,shroudlen*2-shroudflare+bodylen]){
  sphere(d=bodydia);
}

// struts
for(a=[0:3]){
  rotate([0,0,a*90]){
    translate([0,-1,shroudlen-shroudflare]){
      cube([shroud/2,2,shroudflare/2]);
    }
  }
}

// handlebar
translate([-shroud/2,shroud/2+thick/2,shroudlen-shroudflare]){
  rotate([90,0,0]){
    cylinder(d=propshaft/2,h=shroud);
  }
}
//  'instrument'
translate([0,0,shroudlen+bodylen/2]){
  cylinder(d=bodydia+2,h=2);
  translate([-bodydia/2-propshaft/2-2,-propshaft/2,0]){
    cube([propshaft,propshaft,2]);
  }
}

Copy and paste into OpenSCAD and  elaborate to taste from here. 

You will need to cut it in half in the slicer to make a support-free print.

Cheerio,