Charles ∇(P) (those who know...)

GNC @gruyerespace and @PAVESpace

[Charles ∇(P) (those who know...) @Charles_Rockets]

As we’re working @GruyereSpace to enhance our guidance algorithms, I’m testing a trajectory generation algorithm based on constrained optimization on Epsilon 🚀
Ascent is accomplished w/ the old guidance and the new one activates to get back to the pad.
Onboard footage below ⬇️

[PAVE Space @PAVESpace]

We just raised $40M to fix space logistics 🚀 Getting satellites to final orbit still takes 6–12 months. We're building orbital transfer vehicles to do it in under24h. We are building logistics backbone of the space economy. More in @Bloomberg @Siftedeu 👇

[PAVE Space @PAVESpace]

New test site ! 🇨🇭🏔️ Located in the heart of the Swiss Alps, we’ll soon begin testing LYOBA’s main engine at the former Chavalon thermal power plant in Valais. First campaigns start this summer. More updates soon as we bring the first stand online.

[Charles ∇(P) (those who know...) @Charles_Rockets]

@lysandrou_ Great! I was curious if you were going to throw H-infinity at it! Yeah LQRs and PIDs are great, and whatever works! Just don’t be as lazy as we initially were at Gruyère Space Program and neglect sloshing in when tuning the controllers 😅 that doesn’t work too well 😂

[Charles ∇(P) (those who know...) @Charles_Rockets]

@LMCABB @beyrouti @boomsupersonic @DFWAirport @bscholl That's an Air France Concorde though 😉

[Charles ∇(P) (those who know...) @Charles_Rockets]

@lrocket @SpaceX @Space_Station What's the main reason Raptor ended up using coax swirl instead of pintle? Did it come from you or someone else?

[Charles ∇(P) (those who know...) @Charles_Rockets]

@mcrs987 Oh wow, I definitely didn’t pay enough attention during the Flight 8 webcast haha, thanks for showing me these pics!

[Charles ∇(P) (those who know...) @Charles_Rockets]

@mcrs987 Pretty neat! I thought they were passive. Yeah, a 5km anchor chain would be insane 😅

[Charles ∇(P) (those who know...) @Charles_Rockets]

@mcrs987 Or do they use a three-point anchor system instead of a single anchor for each buoy?

[Charles ∇(P) (those who know...) @Charles_Rockets]

@mcrs987 Do you know how the buoy are held in place? Are they just anchored to the bottom? If that’s the case, is it enough to keep them in the place accurately enough? Like I’m thinking about how with a few km of chain, it might drift by hundreds of meter on the surface with currents 🤔

[Charles ∇(P) (those who know...) @Charles_Rockets]

@brickmack @okthisisnagy @SpaceConcordia It’s 9x Rutherford on the first stage though, so just shy of 200kN. I think 40kN might not be quite enough to get to orbit, at least for the first stage

[PAVE Space @PAVESpace]

We successfully tested our #H2O2 catalyst assembly! We validated both decomposition performance and our small scale test stand. Plume is mostly water vapor and oxygen, so barely visible, but we got the expected chamber pressure and temperature! Next up: testing other variants! 🔥

[PAVE Space @PAVESpace]

We’re developing Europe’s first heavy-class #kickstage: POYA 🚀

Delivering 4+ tons of #payload to GEO and beyond, we cut commissioning time from over 6 months to just 24 hours and extend mission lifespans by saving #satellite propellant. 🛰️

Stay tuned to learn more about POYA!

[Charles ∇(P) (those who know...) @Charles_Rockets]

@PetitPoucet100 @booster_10 Zéphyr is their launch, the engine’s name is Navier 😉

[Charles ∇(P) (those who know...) @Charles_Rockets]

@DjJex @TechSpatiales 380 bars en l’occurrence pour ceux là

[Luke Leisher @luke_leisher_]

“Do not use if damaged”

Very important, thank you label.

[Charles ∇(P) (those who know...) @Charles_Rockets]

@DjJex @TechSpatiales Généralement plus de 300 bars, ça peut aller jusqu’à 500-700 bars si ce sont des sphères (ceux en questions sont des cylindres allongés, donc peut-être un peu moins).

[Charles ∇(P) (those who know...) @Charles_Rockets]

@dmasten @Robotbeat I’m curious, what’s the reason for you that Relativity won’t make it?

[Charles ∇(P) (those who know...) @Charles_Rockets]

@InfantryPilot @j32pmxr ATC couldn’t give a high-speed clearance or is it pretty standard to not request it even when the green dot is high?

[Charles ∇(P) (those who know...) @Charles_Rockets]

@BJoshyy @TroastedHam If I remember correctly, the dry mass is around 275T and the thrust of the 13 Raptor engines is 29MN, so the max G it can physically experience during the landing burn is 10-11Gs (probably closer to 9-10Gs when you account for the landing and residual propellants).

[Charles ∇(P) (those who know...) @Charles_Rockets]

@mcrs987 It's rolling quite a bit when the webcast switches to the closeup. I think it's unlikely to "just" be a controller tuning issue, these kind of things rarely happen thanks to simulation (but some unaccounted phenomena in the simulation like sloshing can also cause this behavior).