Where did you source the prepreg? I was given a large roll of uni prepreg but the supply is getting low.
For what it's worth, Fibreglast has 3K Carbon twill, Carbon Uni & 7781 glass in prepreg: https://www.fibreglast.com/category/PrePreg_Fabrics Plus they're room temp shipable/storable.Where did you source the prepreg? I was given a large roll of uni prepreg but the supply is getting low.
Just for comparison and curiosity, how tacky is your prepreg? Sticky to the touch? Or does it only stick to itself?
And remember you’ve been working on this wayyy longer than he’s been messaging people about it. This was your idea, not his. Excited to see this build.Maybe a backstory on this project.
It started back in October 2019 with the intention of designing and building a two-stage rocket to reach 164 000 ft. But with many redesigns, the simulated altitude kept getting higher and higher...
Currently, the main goal is to reach + 328 000 ft using commercial motors with modified casing closures: N5800 to M2245, fully subminimum diameter.
This motor combo has long being simulated reaching altitude past the Karman line, but someone had yet to succeed.
Tu Wien space team already made 2 attempts and are planning on a third at BALLS.
Design-wise it's pretty simple, a mix of Bare Necessities and PHX4. It's probably as short as possibly feasible without a similar inter-stage to PHX4.
Anyway, back to making the last three fins.
It's only a matter of time until RGClark finds out about this thread
And remember you’ve been working on this wayyy longer than he’s been messaging people about it. This was your idea, not his. Excited to see this build.
Cut using a jigsaw, then finishing by hand using sandpaper.
These look great! I’d love to get results like this so I have a bunch of questions for you.
- How did you get them so close to the right size? Did you use a template of some kind? If so, did you adhere it to the plate before cutting it?
- Did you use a carbide-tipped jigsaw blade? If not, what kind of blade did you use?
- Did you cut at full speed?
- Approximately how long did it take you to cut one fin?
- What did you do for dust collection?
- It looks like the outer piles are perpendicular to the root chord of the fin. Is that correct? Why did you choose that orientation?
Your composite work is next-level! I look forward to seeing what you come up with.I'll definitely be attempting to do my own plates one day, resin infusion, prepreg, or wet layup.
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