Kerbal Engineering Systems Profile picture
Apr 11, 2022 12 tweets 3 min read Read on X
Ok, so I looked these clowns up and you might wanna strap in gorg, because it's coconuts. It's bananas. It's a full fruit salad.
Ok so basically they're a Californian-Swedish company with headquarters and manufacturing in Bishop, CA, which is a tiny town in the high desert about an hour's drive from Edwards Air Force Base. Image
The rocket that the monster in the video is presumably a test article for is called Eiger, which is a 2-stage smallsat rocket that can take 150kg to orbit. It's powered by 9 Astrex engines, which use nitric acid and furfuryl alcohol. Image
From the looks of that interstage, I think it hot-stages, but they're pretty sparse on the details. What they do claim is that it's 100% reusable. That claim is questionable to say the least.
For starters, there's a complete lack of any recovery hardware whatsoever on either stage in the renders, and no mention of it on the website.
But the test article in the video is definitely a hopper, so I assume they want to propulsively land the thing. Which I seriously doubt they can do, considering that the larger Electron doesn't have the propellant margin to do that, and keralox has much better performance.
"But what about the second stage?" Well, here's where it really goes off the rails. These guys have Martian ambitions. And the second stages are supposed to be repurposed into modules for an interplanetary transport.
Here's their proposal. Little tiny artificial gravity spaceship made of spent upper stages. The first of many problems I forsee with this configuration is how toxic the fuels that was in those tanks is. If there's ANY residue, your crew is going to have a bad time. Image
And those little cones on either end? Those are the landers. And these things are nuts. They serve as propulsion for the ship, and use the same engines as the rocket.
They're expendable (as they ditch most of their aero shielding on takeoff), and they use, get this, UNPRESSURIZED COCKPITS.
ON MARS.
They're seriously building the monstrosity that Mark Watney cobbled together in The Martian to get the 𝚫V he needed, but as the primary system.
I forsee absolutely zero issues with this approach. Image

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More from @KerbalSystems

Jul 20, 2022
Wake up babes, EcoRocket Heavy just dropped and uh, you might want to strap in, gorg, because this is coconuts. Please keep all hands, arms, feet, and legs inside the bird app at all times, and enjoy the thread: Image
So let's break down this monster. And you'd better believe it's a monster. This thing is THIRTY FOUR METERS in diameter.
Ok, first things first, why does this thing even exist? Well here's the deal: ARCA is pivoting once again from small launch to, get this, ASTEROID MINING. I guess they figured that the market for a 10kg to orbit rocket is...rather limited
Read 32 tweets
Apr 12, 2022
Ok so everyone's favorite clowns, Pythom Space, has posted an update after the new attention, and sweaty, it's not good.
pythom.space/updates/pythom…
Deconstruction: Paragraph on the left is laughable. Sure, WFNA is technically less toxic than UDMH/N204, but still incredibly, incredibly dangerous. If you inhale the vapor or just get too close to it, 𝗶𝘁 𝘄𝗶𝗹𝗹 𝙠𝙞𝙡𝙡 𝘆𝗼𝘂.
pubchem.ncbi.nlm.nih.gov/compound/944#s…
They were absolutely not following proper safety procedures for handling WFNA, and the other two pictures are basically them trying to make excuses.
Read 8 tweets

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