Will the unmanned test flight of Crew Dragon be carrying cargo? And what is happening to the Dragon 1 spacecraft/hulls: how many times can they be or have been used?
Quote from: MATTBLAK on 08/07/2018 10:28 amWill the unmanned test flight of Crew Dragon be carrying cargo? And what is happening to the Dragon 1 spacecraft/hulls: how many times can they be or have been used?It's already been stated around here that the D1 hulls were intended to be used up to three times.
Jessica Jensen was been asked about that on the previous CRS missions and she has always said that Dragon 1 is rated for at least 3 reuses. Dragon 2 is supposed to be rated for more reuses but not for crew use yet, it's not on NASA's plans yet.
Probably already asked multiple Times, of so, please point me to the right thread/messageI read the upcoming cargo flights will be flown with D2.What about the different size of berthing passage when compared to the smaller docking one ?Will be largest cargo moved to Cygnus ?
Here’s what SpaceX must do to win the commercial crew raceDemo test, abort test, finish COPVs, test fuel loading, and so on. It's a long list.ERIC BERGER - 8/9/2018, 7:59 AM
Lueders said the Block V variant of the Falcon 9 rocket first stage, as well as its upper stage, will soon ship from SpaceX’s factory in Hawthorne, California, to the company’s facilities in McGregor, Texas, for engine testing. Afterward, the rocket is scheduled to arrive at Florida’s Cape Canaveral in September. The company has also delivered the spacecraft to Florida, but they still need to finish the Dragon’s trunk for the mission and ship that.
Another good Eric Berger article, this one describing the work left for SpaceX to do for CC:QuoteHere’s what SpaceX must do to win the commercial crew raceDemo test, abort test, finish COPVs, test fuel loading, and so on. It's a long list.ERIC BERGER - 8/9/2018, 7:59 AMhttps://arstechnica.com/science/2018/08/heres-what-spacex-must-do-to-win-the-commercial-crew-race/Edit to add: article includes status of Demo 1 hardwareQuoteLueders said the Block V variant of the Falcon 9 rocket first stage, as well as its upper stage, will soon ship from SpaceX’s factory in Hawthorne, California, to the company’s facilities in McGregor, Texas, for engine testing. Afterward, the rocket is scheduled to arrive at Florida’s Cape Canaveral in September. The company has also delivered the spacecraft to Florida, but they still need to finish the Dragon’s trunk for the mission and ship that.
Quote from: edkyle99 on 08/09/2018 02:29 pm" … to Win the Commercial Crew Race". Ughhh. This is not a "race", and I hope that the contractors don't see it that way. The first to orbit is not the "winner". (Indeed, "racing" to orbit might produce the opposite result.) Kudo's will come to the first - it's only natural. And personally I'm rooting for both.That said, a year after the second Commercial Crew provider is operational pretty much everyone will forget who flew first since we'll be focused on who is flying next.
" … to Win the Commercial Crew Race". Ughhh. This is not a "race", and I hope that the contractors don't see it that way. The first to orbit is not the "winner". (Indeed, "racing" to orbit might produce the opposite result.)
The NASA manager overseeing development of Boeing and SpaceX’s commercial crew ferry ships says the space agency has approved SpaceX’s proposal to strap in astronauts atop Falcon 9 rockets, then fuel the launchers in the final hour of the countdown as the company does for its uncrewed missions.
On some more demanding launches, the lost lift capacity from warmed propellant would prevent the Falcon 9 from satisfying mission requirements.
From the above linked article. QuoteOn some more demanding launches, the lost lift capacity from warmed propellant would prevent the Falcon 9 from satisfying mission requirements.What Commercial Crew mission requirement would require this much payload to the ISS for the F9? I would have thought that using warmed propellant would cause about a 20-30% drop in performance which would require the F9 to perform a barge landing instead of RTLS recovery for the booster.
Quote from: Brovane on 08/09/2018 07:12 pmFrom the above linked article. QuoteOn some more demanding launches, the lost lift capacity from warmed propellant would prevent the Falcon 9 from satisfying mission requirements.What Commercial Crew mission requirement would require this much payload to the ISS for the F9? I would have thought that using warmed propellant would cause about a 20-30% drop in performance which would require the F9 to perform a barge landing instead of RTLS recovery for the booster. I didn't read that as necessarily referring to Commercial Crew missions, I thought he was just talking about Falcon 9 missions in general.
Precisely. CC missions are within the performance range of F9 with boiling props. However using boiling props requires modifications to the GSE, the vehicle, and the pre-launch procedures, just for crew flights.