Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Integza" channel.

  1. 6:40 Oh... it's the same problem that every real world wankel engine has: leak from the side of the rotor.
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  2. Did you build a physical engine or was this a theoretical design only?
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  3. 9:19 You know, every tomato should go directly into trash.
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  4. Maybe you could use home-made valve for pulsing the gas? Basically a shaft rotating 12000 rpm with a through hole in the middle of the gas stream. I guess the seals would be a problem but otherwise you could use shared shaft for both gases to get them to stay in sync.
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  5. 11:40 For minimum friction with small parts, try graphite powder instead. It's a dry lubricant and should result in less total friction than wet lubricant.
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  6. 14:28 Man, I'm pretty sure the way you wear you goggles is not going to protect your eyesight when parts go flying from your 3D printed engine. I hope to see future Integza content, too, so please wear proper goggles.
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  7. 12:33 Please, get a better soldering iron. For example, the open source TS-100 would be good enough. And some high quality flux. It makes soldering much easier.
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  8. Since you cannot turn the welding head to suply filament from the direction the print head is next going to run there's no point trying to keep the welding head angled. However, if you can do it, the welding result should be much better if you feed the filament from the direction that the layer is currently groving. Also, not using fluxcore filament would be a good option because that causes so much random crap on top of the weld that next layer is not going to stick without grinding after every layer. The base warping is a beast, though. I don't know how to fix that other than really slow printing (welding) in short bursts and keeping it cool. Perhaps some kind of water cooling block would help?
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  9. With a felt tip and missing z-commands!
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  10. Have you checked if this bladeless fan generates ozone as a side-product? If so, it's not safe to use indoors. It would also be interesting to wrap the whole mechanism as a rectangular pipe – I would assume that would improve the speed of the output wind even more. The fully open design looks cool, though.
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  11. I think the flappy design is good but you should have another set of flaps to make it tighter against the straight walls to reduce leaks. Unfortunately, you would have to manufacture it from a single piece of teflon and I have no idea how it could be done in practice. The problem is that the edges of the rotor that would need to be pushed against the front and back walls share the edge with the flaps. Perhaps you can keep the rotor static and the back wall could be moving and pressed against the motor with the same air pressure used to drive the engine? For example, the back wall could floating with an o-ring on the edge. And making this floating wall from teflon, too, would reduce the friction. Another way to reduce friction would be to make the front wall out of teflon, too, but then it would be worse for the video. If you push the whole back wall against the rotor with the whole area of the black plate, the sealing force might be too much already. You can probably use another smaller o-ring to limit the area + seal the bearing.
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  12. 3:48 The roller bearing should be moving here, right?
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  13. Yeah, that test looks like a safe thing to do on an attic! You're much more brave than I would be, sir.
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  14. Or gotten eye damage. Any experiments with home made parts and pressure would make me using goggles and full face mask at the same time.
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  15. The most important question is efficiency. How much fuel does this engine need for given power output? If the fuel usage is higher than with gasoline engine, this engine will never see production use in EU area because of strict pollution legislation.
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  16. I'm still surprised that the 3D printed metal could survive this! I thought that the metal would be porous after the process and crack easily with rapid pressure changes.
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  17. You have to find a sponsor for unlimited high temperature refactory cement!
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  18. Rest of the world: wow, this filament for 3D printers is really picky about moisture level of air. Meanwhile: Integza shoots holes to tomato on top of full spool of filament splattering tomato juice everywhere
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  19. If you don't need to fly to space with your rocket, using just 5x more air to get same amount of oxygen is a lot cheaper and more safe.
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  20. Here's the link: This Old Tony: DIY CNC Welding & 3D Metal "Printing" https://youtu.be/sFXniBbgbw0
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  21. 5:00 Maybe get a ballpoint hammer for this kind of tests?
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