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/sci/ - Science & Math

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15136738 No.15136738 [Reply] [Original]

I was building a hydrogen peroxide rocket engine and everything was going great - The gimbal is working beautifuly and the aerospike nozzle turned out better than I expected.
But then the time came to work on the turbopumps, and it seems that I've hit a wall. Spiral centrifugal pumps are a pain to model in the software I use, 3d printed PLA isnt strong enough to resist high RPM (specially when submerged in liquid) and since I'm working with 20mm pipes anything I design turns out so big it takes 7+ hours to print.
I thought of making a sort of inverted car engine where the axis would spin, moving pistons up and down and thus moving the liquid, but moving multiple o-rings up and down would require high torque, which PLA cant handle.
Help pls.

>> No.15136766

>>15133780

>> No.15137035

use metal.

>> No.15137357

>>15137035
yeah it's going to have to be good quality and machined to very good tolerances

>> No.15137406

>>15136738
It looks like this guy made a turbopump for a rocket with resin 3D printing.

https://youtu.be/hko2u0558js

>> No.15137580

>>15137357
investment casting, a jewelry man can probably make it. You are not going to get more strength out of PLA even with heat treatment.