Water Jet-Drive

thingiverse

UPDATE 5/31/19 ------------------------ Research and development are now underway on my end. I've managed to find more time in life to focus on this project, so I printed the last piece and will be conducting some kind of testing within the next few weeks. This test involves an 88mm impeller paired with a 50-65 320kv brushless motor running on 8S, which should generate around 10K rpm and reasonable flow. Ideally, we want this unit to crank at approximately 15k rpm, and I'm eager to see if it can handle the pressures of 20k. The next motor I plan to try is a water-cooled 55-114 at 600kv, which should manage 15k-20k on 8S. For those asking, this project requires a BIG motor - some of the biggest RC motors available or even EV type motors. This 88mm impeller is not a 50mm one; it's pushing pressures similar to commercial 20-30hp units, which also require power similar to that. I wouldn't even attempt to use any motor less than 2.5hp or something like 2000w. UPDATE 12/04/18 ------------------------- I apologize again for the delays everyone has experienced. At this point, I've released all of the models associated with the drive. Due to time constraints, I'm looking for some makers to print what they can to help me conduct some R&D and testing. If you're interested in this project, please reach out to me; I'll be willing to assist in tailoring the product to certain groups and fixing any bugs along the way. Happy printing, everyone! UPDATE 10/11/18 ------------------------ I've been on vacation in Kauai, which is why I haven't printed the scoop yet. However, I have successfully printed everything else, and I'll be releasing the models for the impeller and compression nozzle soon. I'd like some feedback on a specific issue: there's currently a need to machine the shaft so it fits the hex of the impeller, which essentially keys the shaft to the impeller. This requires a machine and a decent understanding of machining tougher carbon steels, which might be impractical for your average guy. So here's my question: do people want me to leave the hex? Or would they prefer me to make a D shape in the impeller so you could potentially just file a flat onto the shaft? Please give me some feedback in the comments so I can make that change and update the model. UPDATE 9/28/18 ------------------------ I've printed the impeller and wear ring. The only remaining parts to print are the scoop and motor brackets, which will allow me to start assembling the unit soon. I should have some live testing going on later this week and into next week. If you'd like to reach out and recommend or ask questions, feel free to shoot me a pm! Mock-parts list ---------------- **Filaments** * PLA - Right now, I'd say close to 1Kg * Polycarbonate/Nylon - If my PLA impeller does not hold up to the pressures we will switch * Ninjaflex/TPU - I am using TPU for O-rings on the wear housing. * Cheetah - I am using Cheetah (harder TPU) for the vector nozzle. **Printed Part Names** * Vector Nozzle - 100% finished and available for download * Compression Nozzle - TBD * Wear housing - TBD * Scoop - TBD **Hardware** * Shaft - 8mm shaft from amazon, will link if it's a final choice. * 8x14x4 bearings - 2 of these support the coupler-end of the shaft. * 13x20x4 bearing - 1 of these supports the impeller end of the shaft. * 20mm snap ring - Snaps the 20mm bearing in place. * 14mm snap ring - Snaps the 14mm bearing in place. * 6mm-8mm coupler - Couples the 8mm impeller shaft to the 6mm motor shaft (specific to current motor/likely to change)