tater Posted August 31, 2020 Share Posted August 31, 2020 Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted August 31, 2020 Share Posted August 31, 2020 Spoiler Just a friendly reminder. This is is the 999th page of the lost&found SpaceX thread, so SpaceX fans should prepare a matinee by the next, the 1kth page. Quote Link to comment Share on other sites More sharing options...
Codraroll Posted August 31, 2020 Share Posted August 31, 2020 1 hour ago, tater said: If this had been a picture from Boca Chica, it would have been genuinely hard to tell which of the three structures in the picture SpaceX would be planning to launch into space. Quote Link to comment Share on other sites More sharing options...
CBase Posted August 31, 2020 Share Posted August 31, 2020 9 hours ago, RCgothic said: A better comparison would be CRS. Indeed comparing the profile from SAOCOM-1B with CRS-20 is interesting: First off: CRS-20 was heavier MaxQ is 5s later than for SAOCOM-1B and speed still around 100 km/h less, but for both at ~14.5 km altitude. However at MECO T+02:27 CRS-20 is only 2s behind and with 5860 km/h @ 67 km altitude compared to SAOCOM-1B MECO at T+02:25 with 5940 km/h @ 78.7 km altitude. So steeper climb seems mostly related to land return, as the first stage should not pick up too much horizontal speed. The lighter payload then just raises the altitude. I always thouhht that the dogleg is pretty early as the faster you go, the more dV is spent for a plane change. Quote Link to comment Share on other sites More sharing options...
tater Posted August 31, 2020 Share Posted August 31, 2020 https://twitter.com/LaunchPhoto/status/1300505482344435714?s=20 Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted August 31, 2020 Share Posted August 31, 2020 Quote Link to comment Share on other sites More sharing options...
RCgothic Posted August 31, 2020 Share Posted August 31, 2020 Superheavy starts production this week: Quote Link to comment Share on other sites More sharing options...
tater Posted August 31, 2020 Share Posted August 31, 2020 (edited) Edited August 31, 2020 by tater Quote Link to comment Share on other sites More sharing options...
RCgothic Posted August 31, 2020 Share Posted August 31, 2020 (edited) I hope that's indicative of Raptor performance improvement and not a loss of payload! Edit: 4-symmetry of legs agrees a bit better with 28 as well. Edited August 31, 2020 by RCgothic Quote Link to comment Share on other sites More sharing options...
tater Posted August 31, 2020 Share Posted August 31, 2020 6 minutes ago, RCgothic said: I hope that's indicative of Raptor performance improvement and not a loss of payload! Edit: 4-symmetry of legs agrees a bit better with 28 as well. I think that until they get orbital EDL down, payload doesn't matter. Improving the booster and payload mass is great, but what they need is "good enough" so that they can start flying. Any delivery of payload at all (Starlink) offsets dev vehicle cost by whatever X F9 Starlink flights actually costs them. *blink* Quote Link to comment Share on other sites More sharing options...
sh1pman Posted August 31, 2020 Share Posted August 31, 2020 TWR of 200 is even higher than Merlin, wow. Quote Link to comment Share on other sites More sharing options...
tater Posted August 31, 2020 Share Posted August 31, 2020 Quote Link to comment Share on other sites More sharing options...
RCgothic Posted August 31, 2020 Share Posted August 31, 2020 1100bar! Wow! Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted August 31, 2020 Share Posted August 31, 2020 1 hour ago, RCgothic said: 1100bar! Wow! IKR? People think the combustion chamber is the crazy part, but first you need to get the propellants to an even higher pressure for injection! Quote Link to comment Share on other sites More sharing options...
Spaceception Posted September 1, 2020 Share Posted September 1, 2020 (edited) I've asked this on the NSF forums, but with this tweet about the 28 Raptors And past renders of a 7 engine core, that leaves one engine out. But Elon said recently that they would be testing a SH with 2 engines. So my thoughts are, could SH now have 2 central engines? But I also saw that someone suggested just 8 engines without a central engine. Edited September 1, 2020 by Spaceception Quote Link to comment Share on other sites More sharing options...
zolotiyeruki Posted September 1, 2020 Share Posted September 1, 2020 5 hours ago, RCgothic said: I hope that's indicative of Raptor performance improvement and not a loss of payload! Edit: 4-symmetry of legs agrees a bit better with 28 as well. If there are 7 central engines, that leaves 21 around them, which doesn't agree very well with 4 legs. If there are 8 central engines, then yeah, you're right. Quote Link to comment Share on other sites More sharing options...
SOXBLOX Posted September 1, 2020 Share Posted September 1, 2020 2 hours ago, StrandedonEarth said: IKR? People think the combustion chamber is the crazy part, but first you need to get the propellants to an even higher pressure for injection! Hah! Most of engine design consists of balancing pressures in the system, so that everything comes out just right. Quote Link to comment Share on other sites More sharing options...
Shpaget Posted September 1, 2020 Share Posted September 1, 2020 Hundreds of cargo flights before humans? That's gonna take a while. On the other hand, orbital next year is amazing, if they can pull it off. Anyway, their F9 missions are almost starting to get boringly norminal. Now I'm watching the abridged versions of launch, MECO and landing, almost hoping for some drama. It's weird. Just a few years ago, landing a rocket was almost science fiction, not it's not normal if it doesn't happen. Amazing time to be alive and watch this unfold. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted September 1, 2020 Share Posted September 1, 2020 14 minutes ago, Shpaget said: Now I'm watching the abridged versions of launch, MECO and landing, almost hoping for some drama. Don’t jinx it! If anything goes blorp now we know who to blame. Speaking of things going blorp, SN7.1 is on the road closure books to begin (potentially) destructive failure starting September 6th. Quote Link to comment Share on other sites More sharing options...
Shpaget Posted September 1, 2020 Share Posted September 1, 2020 Oh, don't worry. I said almost. Besides, I keep my inner ghoul fed by Boeing. Quote Link to comment Share on other sites More sharing options...
RealKerbal3x Posted September 1, 2020 Share Posted September 1, 2020 Seems like they'll be wasting no time on starting SH Booster 1 construction once the high bay is finished... Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted September 1, 2020 Share Posted September 1, 2020 4 hours ago, CatastrophicFailure said: If anything goes blorp Just a rocket with legs, what can be wrong? Quote Link to comment Share on other sites More sharing options...
tater Posted September 1, 2020 Share Posted September 1, 2020 Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted September 1, 2020 Share Posted September 1, 2020 13 hours ago, StrandedonEarth said: 15 hours ago, RCgothic said: 1100bar! Wow! IKR? People think the combustion chamber is the crazy part, but first you need to get the propellants to an even higher pressure for injection! In a FFSC engine, yes. For a GG cycle, I believe the highest pressure is usually in the chamber (or at least in the chamber inlet); the GG pressure drop is used to mechanically drive the turbine that pushes the propellants into the chamber. The FFSC engine uses the pressure drop from the preburner into the chamber to drive the propellants into the preburners! 22 minutes ago, tater said: Dear god in heaven Quote Link to comment Share on other sites More sharing options...
tater Posted September 1, 2020 Share Posted September 1, 2020 (edited) 30 minutes ago, sevenperforce said: Dear god in heaven The best thing about this whole situation is that they are just building the %$#@ thing. For my entire life being interested in spaceflight, stuff like this has been "artist conceptions" and "paper rockets," then "powerpoint" and renders. It's like the ULA/Bigelow video about B330 around the moon. Cool render, bros, but that ending—"for only X billion tax $ we can start making this a reality!" (paraphrase) Edited September 1, 2020 by tater Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.