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Post by Solomon on Feb 10, 2021 11:05:27 GMT -8
I printed Peter's 3d Model of his optimized cast rocket core. I'm a visual thinker so I had to see it in person, even if at 25% size.
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Post by peterberg on Feb 10, 2021 13:53:16 GMT -8
Beautiful! All the details are clearly visable, even the smallest ones like trip wire and kick tail. For other people's information: Solomon asked for a possibility to play with the design and I posted a link to one of the drawings. For who's interested, here is the link. pberg0.home.xs4all.nl/Bestanden/J-tube/6inch-Jtube.skp
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Post by Solomon on Feb 10, 2021 19:19:40 GMT -8
My next idea is printable molds so people can cast their own cores if they want.
Imagine being able to download and print sections of molds on your home 3d printer and then assembling them and casting a core!
3d printers have become so common in the last couple years. Mine is a basic $200 Creality Ender 3 Pro. You can now order any model on Thingiverse to be printed and sent to you for a basic fee. Plastic filament for printing costs only about two cents American per gram for good quality stuff.
For comparison, this whole thing was printed with less than 150 grams of PLA. And it's actually more than 80% hollow.
Imagine how quickly one can innovate and adjust cores. And 3D models means heat flow and dynamic simulations are also possible.
All in our ongoing mission to create a more usable and smoother operating rocket mass heater.
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Post by martyn on Feb 11, 2021 1:16:12 GMT -8
That is fantastic! I am sure this type of mold building would offer the likes of Perter far more scope to develop the designs and add any fine detail that might increase the efficiency of the stoves!
As a DIY project it might be difficult for the average person, without specialist equipment, to cast void free casements especially with fine detail profiles, perhaps one could also offer slightly simplified molds without any fine edges.
I think the molds would be a great small business opportunity for an enterprising person to ‘sell on’ completed units to their local community.
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Post by Solomon on Feb 11, 2021 9:23:04 GMT -8
I'm trying to avoid bringing money into it. Money ruins everything.
There really isn't any specialist equipment. One could do it with an off the shelf Chinese 3d printer, free software, build a vibrating table out of a tire, plywood, and a random electric motor.
All this stuff is already open source. Sure, if you don't want to do the work yourself, you can pay to have it done, but this isn't hard. I'm surprised it hasn't been done already.
With 3d printed molds, we don't need to compromise with square or octagonal risers or ports anymore when we want round. Edges can be perfectly beveled to reduce cracking. Ports can be precisely shaped.
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Post by hilbily on Feb 11, 2021 11:46:36 GMT -8
“I'm trying to avoid bringing money into it. Money ruins everything.“
Many thumbs up and a high five!
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Post by tjeerd on Oct 18, 2021 9:23:03 GMT -8
Does anyone has a 3d model of the burning-chanel in a universal file format like STEP or Iges? I have translated the SKP file online to STL and OBJ, but that gives a bad result in my CAD program. Or just an 2d drawing with all the dimensions on it so I can crate a 3d model myself. Haven't found one yet.
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