tater Posted June 26, 2021 Share Posted June 26, 2021 Quote Link to comment Share on other sites More sharing options...
tater Posted June 27, 2021 Share Posted June 27, 2021 Segment 6. Quote Link to comment Share on other sites More sharing options...
GuessingEveryDay Posted June 27, 2021 Share Posted June 27, 2021 Man, the full stack will look amazing with that. Quote Link to comment Share on other sites More sharing options...
RealKerbal3x Posted June 27, 2021 Share Posted June 27, 2021 3 minutes ago, tater said: Segment 6. Only one and a half to go! Quote Link to comment Share on other sites More sharing options...
SOXBLOX Posted June 27, 2021 Share Posted June 27, 2021 That crane is rather colorful. I guess that makes it a cranebow. Is this tower just a temporary design, or is it more permanent? Quote Link to comment Share on other sites More sharing options...
RCgothic Posted June 27, 2021 Share Posted June 27, 2021 As far as we're aware this a permanent integration tower. It'll get some cladding to tidy it up at some point. Quote Link to comment Share on other sites More sharing options...
RealKerbal3x Posted June 27, 2021 Share Posted June 27, 2021 15 minutes ago, SOXBLOX said: That crane is rather colorful. I guess that makes it a cranebow. Is this tower just a temporary design, or is it more permanent? It's concreted in at the base, so I'd say pretty permanent. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted June 27, 2021 Share Posted June 27, 2021 On 6/26/2021 at 12:23 PM, tater said: Those seem kinda far from the eventual crane… it must have some crazy reach. Quote Link to comment Share on other sites More sharing options...
cubinator Posted June 27, 2021 Share Posted June 27, 2021 6 hours ago, tater said: Segment 6. Ok I gotta ask...I don't suppose there's an elevator in there yet, so do the workers ride up on the crane? Or do they have to take the stairs? Quote Link to comment Share on other sites More sharing options...
tater Posted June 27, 2021 Share Posted June 27, 2021 Interesting. 10 sides, with 2 pillars per side—this is related to the SH outer ring of engines, clearly. 2 minutes ago, cubinator said: Ok I gotta ask...I don't suppose there's an elevator in there yet, so do the workers ride up on the crane? Or do they have to take the stairs? Actually, there is an elevator visible. Goes to the 4th or 5th segment. Quote Link to comment Share on other sites More sharing options...
RyanRising Posted June 27, 2021 Share Posted June 27, 2021 Apparently there’s an RVac at Boca Chica now: Pretty cool stuff. Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2021 Share Posted June 28, 2021 Quote Link to comment Share on other sites More sharing options...
Beccab Posted June 28, 2021 Share Posted June 28, 2021 (edited) 1 hour ago, tater said: Worth noting that 378 isp is already the isp they were targeting for it, and that in 2019 he said it would be later possible for the rVac to reach 385 isp albeit very difficult Edit: old video (9 months ago), but this is how the static fire of a rVac looks like and this the comparison between normal raptors and vac ones Edited June 28, 2021 by Beccab Quote Link to comment Share on other sites More sharing options...
AVaughan Posted June 28, 2021 Share Posted June 28, 2021 14 hours ago, tater said: Interesting. 10 sides, with 2 pillars per side—this is related to the SH outer ring of engines, clearly. Maybe hold-down clamps? Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted June 28, 2021 Share Posted June 28, 2021 8 hours ago, tater said: Okay, nice. That helps with some of the speculative maths.... Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2021 Share Posted June 28, 2021 33 minutes ago, sevenperforce said: Okay, nice. That helps with some of the speculative maths.... Yeah, I've been using 380 until now. Would be interesting to see what parameters are required for a LSS to be propulsively staged from LEO. I still like "tug" architecture, myself, but I think it might well be possible to run the whole thing from LEO/MEO as any refilling ops around the Moon don't really save anything (you have to get those props there regardless, might as well take them in the LSS itself). Quote Link to comment Share on other sites More sharing options...
Beccab Posted June 28, 2021 Share Posted June 28, 2021 Do we have any info regarding the isp of sea level raptors? Quote Link to comment Share on other sites More sharing options...
magnemoe Posted June 28, 2021 Share Posted June 28, 2021 22 minutes ago, tater said: Yeah, I've been using 380 until now. Would be interesting to see what parameters are required for a LSS to be propulsively staged from LEO. I still like "tug" architecture, myself, but I think it might well be possible to run the whole thing from LEO/MEO as any refilling ops around the Moon don't really save anything (you have to get those props there regardless, might as well take them in the LSS itself). The problem is that LSS can not aerobrake into LEO, the tankers can as they have heat shield and flaps. And if the aerobrake fails you only loose a tanker. Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2021 Share Posted June 28, 2021 15 minutes ago, Beccab said: Do we have any info regarding the isp of sea level raptors? 350s 6 minutes ago, magnemoe said: The problem is that LSS can not aerobrake into LEO, the tankers can as they have heat shield and flaps. And if the aerobrake fails you only loose a tanker. Propulsively. Musk said tank could be stretched for 1600t of propellants. A 60t SS could then leave LEO, land on the Moon, and return to LEO with no aerobraking at all (using 378s Isp). That's a fast transit. Assuming the crew is not taking SS from LEO (Orion/whatever), they can reduce the dv requirements slightly with a slower transfer. Assuming an 80t LSS, it's slightly low on dv for this, but the retanking ops could simply be in a higher orbit. The bottom line is LSS can certainly function from an Earth orbit, it's just a matter of where. Tanker 1 goes to LEO and gets filled. Tanker 2 goes to LEO and is partially filled. LSS is sent to MEO and is met by tanker 1 and 2, and topped off completely. Does complete lunar mission, and returns to MEO. Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2021 Share Posted June 28, 2021 Alternately make a SS that sheds the nose as a fairing, and what would be the payload adapter is just a match for the base. You now have a SS tug that has engines on the bottom, and a "bottom" for docking also on the top. Fill that. Fill LSS. Dock tug to LSS, give LSS 2.3 to 2.5km/s with tug. Tug propulsively returns to LEO. 80t LSS with normal 1200t props can fly to lunar surface and back to LEO using engines, no aerobraking. The special sauce with SS is refilling. If they can land stage 2 just for uncrewed tankers and do the refilling ops... SS changes literally everything. Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted June 28, 2021 Share Posted June 28, 2021 I think it’s worth noting that all Starship variants including Lunar will be stainless steel, as far as we know. As such, they should be able to take a fair amount of aerobrake without any extra thermal protection, especially if there are leftover props to act as a heat sink. And when crew is not involved and time is less of an issue, then the aerobrake passes can be as shallow as they need to be Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2021 Share Posted June 28, 2021 54 minutes ago, StrandedonEarth said: I think it’s worth noting that all Starship variants including Lunar will be stainless steel, as far as we know. As such, they should be able to take a fair amount of aerobrake without any extra thermal protection, especially if there are leftover props to act as a heat sink. And when crew is not involved and time is less of an issue, then the aerobrake passes can be as shallow as they need to be Yeah, for any uncrewed variant, they can make as many passes as needed. Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2021 Share Posted June 28, 2021 segment 7 OTW: Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2021 Share Posted June 28, 2021 NSF post shows them lifting the next elevator segment so that workers can get to the top for segment 7. Quote Link to comment Share on other sites More sharing options...
RCgothic Posted June 29, 2021 Share Posted June 29, 2021 Personally I'd err towards Late August. Quote Link to comment Share on other sites More sharing options...
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