Now with that out of the way here's a few speculations on my part about what they're doing (assuming they're going to announce their concept, which Blackstar hasn't actually stated yet):...
Now with that out of the way here's a few speculations on my part about what they're doing (assuming they're going to announce their concept, which Blackstar hasn't actually stated yet):1- A CRS-2 bid means they're going to have to cover the development cost themselves, and try to recoup it during the CRS-2 process while competing with SpaceX and OSC that have already had their development paid for. This suggests something very simple, flying on a vehicle that's already operational (Atlas V, IMO).2- My best guess would be an LM-flavored Cygnus equivalent. Centaur tank derived pressure structure (like what ARCTUS proposed but likely bigger), bus derived from one of their existing buses (either a commercial one, a DoD one, or a NASA one), and prox ops based on what they've proven out for Orion.3- I think they'll shoot for bigger payloads with fewer flights per year than Cygnus.4- Unclear on if they would try for something recoverable or not, though my guess based on #1 is that they'd go for disposable like Cygnus.
However what would really be neat is if they decided that the Dream Chaser was worth the risk, and assuming they see a future in Commercial Crew that it would also allow them to muscle into that too, even if it's only for non-NASA flights. Maybe do some sort of win-win joint venture with Sierra Nevada.I can wish... ;)
Quote from: jongoff on 03/06/2015 04:22 amNow with that out of the way here's a few speculations on my part about what they're doing (assuming they're going to announce their concept, which Blackstar hasn't actually stated yet):...Sounds completely logical and doable. Would be interesting if they propose it as you have outlined it.However what would really be neat is if they decided that the Dream Chaser was worth the risk, and assuming they see a future in Commercial Crew that it would also allow them to muscle into that too, even if it's only for non-NASA flights. Maybe do some sort of win-win joint venture with Sierra Nevada.I can wish...
Quote from: TrevorMonty on 03/05/2015 08:56 pmIt just so happens that LM build DC for SNC.I didn't quite understand that post. We seem to moving from 4 letter acronyms to 2 letters. Perhaps in the future, we can economize further by using just one letter for everything.
It just so happens that LM build DC for SNC.
Quote from: ChrisWilson68 on 03/05/2015 06:22 pmQuote from: Blackstar on 03/05/2015 06:18 pmLockheed Martin.That is interesting! I hope that means LM put in an unexpected bid for CRS2.I had heard from a few non-LM sources that they had put in a CRS-2 bid. I've even heard some speculation on their approach. It would be cool to hear a formal confirmation and more details if that's what the announcement is. So no, I at least don't find this unexpected at all.Now with that out of the way here's a few speculations on my part about what they're doing (assuming they're going to announce their concept, which Blackstar hasn't actually stated yet):1- A CRS-2 bid means they're going to have to cover the development cost themselves, and try to recoup it during the CRS-2 process while competing with SpaceX and OSC that have already had their development paid for. This suggests something very simple, flying on a vehicle that's already operational (Atlas V, IMO).2- My best guess would be an LM-flavored Cygnus equivalent. Centaur tank derived pressure structure (like what ARCTUS proposed but likely bigger), bus derived from one of their existing buses (either a commercial one, a DoD one, or a NASA one), and prox ops based on what they've proven out for Orion.3- I think they'll shoot for bigger payloads with fewer flights per year than Cygnus.4- Unclear on if they would try for something recoverable or not, though my guess based on #1 is that they'd go for disposable like Cygnus.Anyhow, speculation aside, it'll be interesting to see what the actual announcement is.~Jon
Quote from: Blackstar on 03/05/2015 06:18 pmLockheed Martin.That is interesting! I hope that means LM put in an unexpected bid for CRS2.
Lockheed Martin.
Quote from: jongoff on 03/06/2015 04:22 amQuote from: ChrisWilson68 on 03/05/2015 06:22 pmQuote from: Blackstar on 03/05/2015 06:18 pmLockheed Martin.That is interesting! I hope that means LM put in an unexpected bid for CRS2.I had heard from a few non-LM sources that they had put in a CRS-2 bid. I've even heard some speculation on their approach. It would be cool to hear a formal confirmation and more details if that's what the announcement is. So no, I at least don't find this unexpected at all.Now with that out of the way here's a few speculations on my part about what they're doing (assuming they're going to announce their concept, which Blackstar hasn't actually stated yet):1- A CRS-2 bid means they're going to have to cover the development cost themselves, and try to recoup it during the CRS-2 process while competing with SpaceX and OSC that have already had their development paid for. This suggests something very simple, flying on a vehicle that's already operational (Atlas V, IMO).2- My best guess would be an LM-flavored Cygnus equivalent. Centaur tank derived pressure structure (like what ARCTUS proposed but likely bigger), bus derived from one of their existing buses (either a commercial one, a DoD one, or a NASA one), and prox ops based on what they've proven out for Orion.3- I think they'll shoot for bigger payloads with fewer flights per year than Cygnus.4- Unclear on if they would try for something recoverable or not, though my guess based on #1 is that they'd go for disposable like Cygnus.Anyhow, speculation aside, it'll be interesting to see what the actual announcement is.~JonIn the past I speculated that Boeing might do something like this. Either revive HTV on EELV (that they proposed a long time ago), or build their own Cygnus competitor sharing some processing/parts with CST.I didn't think about LM doing the same thing but I don't see why not. Looking through some old Planetspace stuff, it looks like they had plans to operate on Atlas V, in addition to the proposed Athena III vehicle.I'm going to double down on my earlier speculation and guess that:1. It's big. Launched on one of the heavier Atlases or even DIV-H2. Offering one to NASA every 12-18 months3. Has either HTV or old Planetspace OTV heritage; looks more like HTV than Cygnus.4. First flight NET 2018, more likely 2019.
Quote from: TrevorMonty on 03/05/2015 08:56 pmIt just so happens that LM build DC for SNC.LM is not the lead on the SNC proposal. It's just a contractor. But it's possible that LM has submitted its own bid. Perhaps, a cargo Orion?
The CRS-2 specifications didn't wanted less than 3/yr. The station needs periodical missions to carry last minute cargo. May be they could use 5 Dragon + one big cargo. But I believe that for LEO, even an Atlas V 551 can only put 17tonnes to ISS orbit. And a spacecraft could hardly carry more than 50% of total LV payload in cargo. Thus, they can't really cover the minimum in a single launch.Now, an AV431 can do 13tonnes to ISS, is quite cheaper, and they can put more than enough volume (say a 3.6m diameter PCM, which could have 45m³) to carry 6 tonnes per launch. They can easily cover their requirement in three launches and it would not be a vehicle much bigger than a Super Cygnus.
Those sound like excellent guesses to me. Going for Cygnus's niche makes a lot more sense than going for Dragon's niche. For CRS-1, Cygnus gets a lot more money per flight than SpaceX does per flight, so it's easier for them to make a profit using Atlas V at the Cygnus pricepoint...
Cygnus was basically put together from existing parts, and there's not much reason LM couldn't follow suit.
1-Yeah, I'm definitely a fan of frequent deliveries, for the reasons you suggested.2-But we don't even know for sure at this point if the announcement will be news on an LM CRS-2 bid, so we shall see.
Quote from: baldusi on 03/06/2015 07:43 pmThe CRS-2 specifications didn't wanted less than 3/yr. The station needs periodical missions to carry last minute cargo. May be they could use 5 Dragon + one big cargo. But I believe that for LEO, even an Atlas V 551 can only put 17tonnes to ISS orbit. And a spacecraft could hardly carry more than 50% of total LV payload in cargo. Thus, they can't really cover the minimum in a single launch.Now, an AV431 can do 13tonnes to ISS, is quite cheaper, and they can put more than enough volume (say a 3.6m diameter PCM, which could have 45m³) to carry 6 tonnes per launch. They can easily cover their requirement in three launches and it would not be a vehicle much bigger than a Super Cygnus.Yeah, I'm definitely a fan of frequent deliveries, for the reasons you suggested. If I were them, I'd try to come up with something with low empty mass that could launch on an Atlas V 401. But we don't even know for sure at this point if the announcement will be news on an LM CRS-2 bid, so we shall see.~Jon
1-Lots of flights really challenge ISS operations. They create a lot of work for the astronauts and scheduling is a real pain.
Quote from: Blackstar on 03/06/2015 09:50 pm1-Lots of flights really challenge ISS operations. They create a lot of work for the astronauts and scheduling is a real pain.Sure, it's a balance that needs to be struck. More frequent deliveries does have an impact on logistics and scheduling, but too infrequent and it has a negative impact on science as well. ~Jon
Quote from: jongoff on 03/07/2015 01:59 amQuote from: Blackstar on 03/06/2015 09:50 pm1-Lots of flights really challenge ISS operations. They create a lot of work for the astronauts and scheduling is a real pain.Sure, it's a balance that needs to be struck. More frequent deliveries does have an impact on logistics and scheduling, but too infrequent and it has a negative impact on science as well. ~JonEach berthing takes away something like 3 man/days of crew time and it interrupts the microgravity environment. Thus, they wanted 6 to 8 berthing events and 20 to 30 tonnes per year with at least two contractors.