insert_name Posted June 26, 2017 Share Posted June 26, 2017 2 hours ago, sevenperforce said: Falcon 9 definitely can't pull RTLS for any LEO flight. If you'll recall, the very first booster to be reflown was from a CRS mission, and it landed on OCISLY. I don't know the exact number, but I think it's somewhere around 7 tonnes to LEO; anything below that can reserve enough propellant for RTLS; anything above that needs an ASDS. An Iridium constellation launch weighs in at 9.6 tonnes. Also, the Iridium sats go a bit higher than most LEO payloads, and the polar inclination doesn't help. CRS 7 could have been RTLS but they choose to have it landed on OCISLY to gain experience landing on the droneships as all other droneship landings had failed at that time Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted June 26, 2017 Share Posted June 26, 2017 1 minute ago, insert_name said: CRS 7 could have been RTLS but they choose to have it landed on OCISLY to gain experience landing on the droneships as all other droneship landings had failed at that time Elon said that RTLS would have been pushing the envelope (since CRS-7 was carrying BEAM, which weighed down Dragon a bit), while they were much more optimistic about an ASDS landing in comparison. In any case, somewhere between 7 and 10 tonnes is probably the cutoff. Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted June 26, 2017 Share Posted June 26, 2017 1 hour ago, sevenperforce said: Elon said that RTLS would have been pushing the envelope (since CRS-7 was carrying BEAM, which weighed down Dragon a bit), while they were much more optimistic about an ASDS landing in comparison. In any case, somewhere between 7 and 10 tonnes is probably the cutoff. Slight correction, CRS-7 exploded. CRS-8 carried BEAM. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted June 26, 2017 Share Posted June 26, 2017 4 hours ago, KSK said: Sooo - is a tardigrade burn one that was too late to have the desired effect? Its what you call it when you accidentally warp thru your maneuver node. Quote Link to comment Share on other sites More sharing options...
tater Posted June 26, 2017 Share Posted June 26, 2017 The launch is not yet scheduled at spaceflightnow, but listed as July. So it might happen the very beginning of the month, on the same 2 week schedule (though it won't necessarily happen Thursday, it's Not Earlier Than, after all. Still, awesome cadence. Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted June 27, 2017 Share Posted June 27, 2017 Amusing thought I saw on another forum: Now SpaceX only needs two sets of grid fins, one set for each coast. At least until FH flies. Quote Link to comment Share on other sites More sharing options...
tater Posted June 27, 2017 Share Posted June 27, 2017 4 sets, unless they can make a new set in under 2 weeks---just to have a spare in case of a failed landing. Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted June 27, 2017 Share Posted June 27, 2017 Just now, tater said: 11 minutes ago, sevenperforce said: Amusing thought I saw on another forum: Now SpaceX only needs two sets of grid fins, one set for each coast. At least until FH flies. 4 sets, unless they can make a new set in under 2 weeks---just to have a spare in case of a failed landing. The joke being that they won't have failed landings. Quote Link to comment Share on other sites More sharing options...
tater Posted June 27, 2017 Share Posted June 27, 2017 Heh. Still, effectively true with a spare. Quote Link to comment Share on other sites More sharing options...
magnemoe Posted June 27, 2017 Share Posted June 27, 2017 1 hour ago, tater said: Heh. Still, effectively true with a spare. However they are unlikely to swap the fins between rockets who is under testing and re-qualification for next launch. They might do if they run short who is standard equipment cannibalism Quote Link to comment Share on other sites More sharing options...
tater Posted June 27, 2017 Share Posted June 27, 2017 (edited) They're all the same part. The previous versions needed cleaning and repainting every time, and were removed for this anyway. It makes no sense not to at the very least pull them off of any expendable vehicle, for example, then reuse them. or when the time comes, decommission a given core, and take the fins if they are still fine. Intelsat 35e launch from 39A is static fire Thursday, and Launch NET July 3 (Monday). Edited June 27, 2017 by tater Quote Link to comment Share on other sites More sharing options...
Codraroll Posted June 27, 2017 Share Posted June 27, 2017 On 26.6.2017 at 11:47 AM, KSK said: Sooo - is a tardigrade burn one that was too late to have the desired effect? Alternate interpretation: Prograde burn - burning to accelerate in the direction you're heading. Retrograde burn - burning to accelerate in the opposite direction of where you're heading. Tardigrade burn - sterilizing your spacecraft. Quote Link to comment Share on other sites More sharing options...
StupidAndy Posted June 27, 2017 Share Posted June 27, 2017 is there any video for the Bulgariasat-1 landing? Quote Link to comment Share on other sites More sharing options...
tater Posted June 27, 2017 Share Posted June 27, 2017 21 minutes ago, StupidAndy said: is there any video for the Bulgariasat-1 landing? Those usually appear when the ASDS returns. I think OCISLY is due later in the week. Quote Link to comment Share on other sites More sharing options...
cubinator Posted June 28, 2017 Share Posted June 28, 2017 1 hour ago, tater said: Those usually appear when the ASDS returns. I think OCISLY is due later in the week. So the Falcon spends quite a while at sea, huh? Do ground crews have to repair any ocean-related damage done to the booster due to this time in transit back to port? Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2017 Share Posted June 28, 2017 Well, it's a few to several hundred km down range, and it's not designed for speed . Quote Link to comment Share on other sites More sharing options...
Skylon Posted June 28, 2017 Author Share Posted June 28, 2017 (edited) Just wondering: from the stats given, could we predict how much an ITS heavy could lift? What is the DeltaV split between he second and first stage? Edited June 28, 2017 by Skylon Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted June 28, 2017 Share Posted June 28, 2017 21 minutes ago, Skylon said: Just wondering: from the stats given, could we predict how much an ITS heavy could lift? All of it. Quote Link to comment Share on other sites More sharing options...
Hannu2 Posted June 28, 2017 Share Posted June 28, 2017 10 hours ago, Codraroll said: Alternate interpretation: Prograde burn - burning to accelerate in the direction you're heading. Retrograde burn - burning to accelerate in the opposite direction of where you're heading. Tardigrade burn - sterilizing your spacecraft. As far as I know about tardigrade's ability to survive in extreme conditions the last must be a flyby through Sun's photosphere. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted June 28, 2017 Share Posted June 28, 2017 Via spaceflightnow.com: Intelsat 35e now moved up to July 2, 7:36 EDT. also, CRS-12 on August 10, Formosat August 24, absolutely not Air Force spy plane August 28. Quote Link to comment Share on other sites More sharing options...
TheEpicSquared Posted June 28, 2017 Share Posted June 28, 2017 http://spacenews.com/spacexs-final-falcon-9-design-coming-this-year-two-falcon-heavy-launches-next-year/ So a methalox Falcon series could possibly maybe be a thing? Interesting. Quote Link to comment Share on other sites More sharing options...
wumpus Posted June 28, 2017 Share Posted June 28, 2017 (edited) 4 hours ago, TheEpicSquared said: http://spacenews.com/spacexs-final-falcon-9-design-coming-this-year-two-falcon-heavy-launches-next-year/ So a methalox Falcon series could possibly maybe be a thing? Interesting. That seems well after a "final" Falcon 9 design. Also if they are building 20 falcons and have nearly a dozen used boosters in storage, just what do they plan on launching? I another thread (probably a SLS-bashing one) someone pointed out that the Saturn V was built to go to the moon, not the moon chosen because we built the Saturn V [note: Kennedy originally wanted Mars, but was told that it was beyond our capabilities]. Does Musk really have that many satellites to launch? Edited June 28, 2017 by wumpus Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted June 28, 2017 Share Posted June 28, 2017 16 minutes ago, wumpus said: Does Musk really have that many satellites to launch? Yep. Spoiler AIRBUS DEFENCE AND SPACE VANDENBERG FALCON 9 ARABSAT (ARABSAT 6A) FLORIDA LAUNCH SITE FALCON HEAVY BANGABANDHU-1 CAPE CANAVERAL FALCON 9 BIGELOW AEROSPACE CAPE CANAVERAL FALCON 9 CONAE (ARGENTINA) VANDENBERG FALCON 9 CONAE (ARGENTINA) VANDENBERG FALCON 9 ES'HAILSAT FLORIDA LAUNCH SITE FALCON 9 FALCON HEAVY DEMO FLORIDA LAUNCH SITE FALCON HEAVY GLOBAL IP FLORIDA LAUNCH SITE FALCON 9 GOVSAT-1 CAPE CANAVERAL FALCON 9 HISDESAT VANDENBERG FALCON 9 HISPASAT CAPE CANAVERAL FALCON 9 INMARSAT CAPE CANAVERAL FALCON HEAVY IRIDIUM (FLIGHT 3) VANDENBERG FALCON 9 IRIDIUM (FLIGHT 4) VANDENBERG FALCON 9 IRIDIUM (FLIGHT 5) VANDENBERG FALCON 9 IRIDIUM (FLIGHT 6) VANDENBERG FALCON 9 IRIDIUM (FLIGHT 7) VANDENBERG FALCON 9 IRIDIUM (FLIGHT 8) VANDENBERG FALCON 9 KOREASAT CAPE CANAVERAL FALCON 9 NASA (SWOT) VANDENBERG FALCON 9 NASA (TESS) CAPE CANAVERAL FALCON 9 NASA CREW (DEMO 1) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA CREW (DEMO 2) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA CREW (FLIGHT 1) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA CREW (FLIGHT 2) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 11) CAPE CANAVERAL DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 12) CAPE CANAVERAL DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 13) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 14) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 15) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 16) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 17) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 18) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 19) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 20) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 21) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 22) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 23) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 24) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 25) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NASA RESUPPLY TO ISS (FLIGHT 26) FLORIDA LAUNCH SITE DRAGON & FALCON 9 NORTHROP GRUMMAN CAPE CANAVERAL FALCON 9 NSPO (TAIWAN) VANDENBERG FALCON 9 OHB SYSTEM AG VANDENBERG FALCON 9 RADARSAT VANDENBERG FALCON 9 SES (SES-11) FLORIDA LAUNCH SITE FALCON 9 SES (SES-14) FLORIDA LAUNCH SITE FALCON 9 SPACEFLIGHT SERVICES VANDENBERG FALCON 9 TELESAT (TELSTAR 18V) FLORIDA LAUNCH SITE FALCON 9 TELESAT (TELSTAR 19V) FLORIDA LAUNCH SITE FALCON 9 U.S. AIR FORCE (GPS III-2) FLORIDA LAUNCH SITE FALCON 9 U.S. AIR FORCE (STP-2) FLORIDA LAUNCH SITE FALCON HEAVY VIASAT CAPE CANAVERAL FALCON HEAVY Quote Link to comment Share on other sites More sharing options...
tater Posted June 28, 2017 Share Posted June 28, 2017 Regarding satellites, the plan is a constellation of thousands of small sats as I recall (his own company). They have substantial backlog of launches as it is, and the current cadence certainly helps them clear it. Raptor on Falcon is an interesting idea that I had frankly dismissed, but given what Shotwell said the other day I am more open to it being a thing. Seems to me that any such vehicle might be a sort of mini-BFS as a proof of concept, where F9 is the BFR booster. Quote Link to comment Share on other sites More sharing options...
IncongruousGoat Posted June 28, 2017 Share Posted June 28, 2017 (edited) 4 hours ago, TheEpicSquared said: http://spacenews.com/spacexs-final-falcon-9-design-coming-this-year-two-falcon-heavy-launches-next-year/ So a methalox Falcon series could possibly maybe be a thing? Interesting. More importantly, the name Block 5 makes sense now. Edited June 28, 2017 by IncongruousGoat Quote Link to comment Share on other sites More sharing options...
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