"Furthermore, the integrated escape system returns with the spacecraft, allowing for easy reuse and radical reductions in the cost of space transport. Over time, the same escape thrusters will also provide the capability for Dragon to land almost anywhere on Earth or another planet with pinpoint accuracy, overcoming the limitation of a winged architecture that works only in Earth’s atmosphere."http://www.spacex.com/press.php?page=20110419Ok, I just backed it up. Not opinion but stated from Spacex's own website. Clearly it's not just my opinion but Spacex's as well.
Quote from: Ronsmytheiii on 04/21/2011 03:16 amAll major points:Quote-NASA envisions the need for CCDev 3 or 4. Once round 2 is completed, and with Congressional approval it is possible to get started on a big commercial crew program -NASA has not made a final determination regarding the acquisition strategy for commercial crew beyond CCDev 2-NASA does not know yet if three crew flights a year is sufficient to meet International Space Station (ISS) requirements, or whether commercial companies can make a business case for it.-NASA is releasing a Request for Proposal (RFP) or an Announcement for Proposal (AFP) for commercial crew services in late summer 2011 and will be choosing 4-6 companies for the first round of efforts. RFP is for a contract and AFP is for Space Act Agreements. Edit: I dont understand from the wording if CCDEV 3/4 will be the " big commercial crew program" or if it is separate. guessingCOTS => CRS (Cargo Resupply Services)soCCDEV => {something like CCRS (Commercial Crew Resupply Services)}
All major points:Quote-NASA envisions the need for CCDev 3 or 4. Once round 2 is completed, and with Congressional approval it is possible to get started on a big commercial crew program -NASA has not made a final determination regarding the acquisition strategy for commercial crew beyond CCDev 2-NASA does not know yet if three crew flights a year is sufficient to meet International Space Station (ISS) requirements, or whether commercial companies can make a business case for it.-NASA is releasing a Request for Proposal (RFP) or an Announcement for Proposal (AFP) for commercial crew services in late summer 2011 and will be choosing 4-6 companies for the first round of efforts. RFP is for a contract and AFP is for Space Act Agreements. Edit: I dont understand from the wording if CCDEV 3/4 will be the " big commercial crew program" or if it is separate.
-NASA envisions the need for CCDev 3 or 4. Once round 2 is completed, and with Congressional approval it is possible to get started on a big commercial crew program -NASA has not made a final determination regarding the acquisition strategy for commercial crew beyond CCDev 2-NASA does not know yet if three crew flights a year is sufficient to meet International Space Station (ISS) requirements, or whether commercial companies can make a business case for it.-NASA is releasing a Request for Proposal (RFP) or an Announcement for Proposal (AFP) for commercial crew services in late summer 2011 and will be choosing 4-6 companies for the first round of efforts. RFP is for a contract and AFP is for Space Act Agreements.
Regarding pinpoint propulsive landings, I'll just say words are cheap, and execution means infinitely more. That's actually how I feel about this whole CCDev strategy - it's lunacy to scrap our only existing human spaceflight capability when this program is in its infancy, with so much uncertainty. History would suggest not to believe current optimistic schedule or cost projections, and to be prepared for actual results to fall short of current promises.
Quote from: vt_hokie on 04/22/2011 04:42 pmRegarding pinpoint propulsive landings, I'll just say words are cheap, and execution means infinitely more. That's actually how I feel about this whole CCDev strategy - it's lunacy to scrap our only existing human spaceflight capability when this program is in its infancy, with so much uncertainty. History would suggest not to believe current optimistic schedule or cost projections, and to be prepared for actual results to fall short of current promises.I agree..but what would you do if you were NASA with a finite budget??
Quote from: vt_hokie on 04/22/2011 04:42 pmRegarding pinpoint propulsive landings, I'll just say words are cheap, and execution means infinitely more. That's actually how I feel about this whole CCDev strategy - it's lunacy to scrap our only existing human spaceflight capability when this program is in its infancy, with so much uncertainty. History would suggest not to believe current optimistic schedule or cost projections, and to be prepared for actual results to fall short of current promises.By 2008 saving the shuttle was not a good idea(it would have required more than a regular budget becuase some contracts and contracters would have needed to be restarted.). Commercail imho is the only sensible option that didn't need a huge NASA budget increase nor a major amount of time to fund.
Quote from: HIP2BSQRE on 04/22/2011 04:45 pmQuote from: vt_hokie on 04/22/2011 04:42 pmRegarding pinpoint propulsive landings, I'll just say words are cheap, and execution means infinitely more. That's actually how I feel about this whole CCDev strategy - it's lunacy to scrap our only existing human spaceflight capability when this program is in its infancy, with so much uncertainty. History would suggest not to believe current optimistic schedule or cost projections, and to be prepared for actual results to fall short of current promises.I agree..but what would you do if you were NASA with a finite budget??Evaluate on a technical basis with an eye to securing the short-term in order to protect and promote the longer-term. Not just throw a hail mary and hope and assume it will be great.
Let's just hope this program turns out better than "safe, simple, soon" Constellation and every prior attempt at replacing the shuttle, because this time the ISS depends on it!
Quote from: vt_hokie on 04/22/2011 10:43 pmLet's just hope this program turns out better than "safe, simple, soon" Constellation and every prior attempt at replacing the shuttle, because this time the ISS depends on it!Luckily, this time it doesn't depend on a new launch vehicle development. Every other time assumed new launch vehicle development, with the notable exception of the so-called Orbital Space Plane (OSP) program, which actually I think both Boeing's CST-100 and Lockheed Martin's Orion are at least partially descended from (before Orion got partially screwed up from the new launch vehicle requirements).http://spacecraft.ssl.umd.edu/akins_laws.htmlAkin's Law #39:The three keys to keeping a new manned space program affordable and on schedule: 1) No new launch vehicles. 2) No new launch vehicles. 3) Whatever you do, don't decide to develop any new launch vehicles.
Quote from: Robotbeat on 04/23/2011 04:45 amLuckily, this time it doesn't depend on a new launch vehicle development. Every other time assumed new launch vehicle development, with the notable exception of the so-called Orbital Space Plane (OSP) program, which actually I think both Boeing's CST-100 and Lockheed Martin's Orion are at least partially descended from (before Orion got partially screwed up from the new launch vehicle requirements).http://spacecraft.ssl.umd.edu/akins_laws.htmlAkin's Law #39:The three keys to keeping a new manned space program affordable and on schedule: 1) No new launch vehicles. 2) No new launch vehicles. 3) Whatever you do, don't decide to develop any new launch vehicles.The Falcon Heavy is a new launch vehicle.
Luckily, this time it doesn't depend on a new launch vehicle development. Every other time assumed new launch vehicle development, with the notable exception of the so-called Orbital Space Plane (OSP) program, which actually I think both Boeing's CST-100 and Lockheed Martin's Orion are at least partially descended from (before Orion got partially screwed up from the new launch vehicle requirements).http://spacecraft.ssl.umd.edu/akins_laws.htmlAkin's Law #39:The three keys to keeping a new manned space program affordable and on schedule: 1) No new launch vehicles. 2) No new launch vehicles. 3) Whatever you do, don't decide to develop any new launch vehicles.
The modification needed to man rate the EELV and add a LAS may be the equivalent of developing a new launch vehicle.
Quote from: A_M_Swallow on 04/23/2011 10:22 pmQuote from: Robotbeat on 04/23/2011 04:45 amLuckily, this time it doesn't depend on a new launch vehicle development. Every other time assumed new launch vehicle development, with the notable exception of the so-called Orbital Space Plane (OSP) program, which actually I think both Boeing's CST-100 and Lockheed Martin's Orion are at least partially descended from (before Orion got partially screwed up from the new launch vehicle requirements).http://spacecraft.ssl.umd.edu/akins_laws.htmlAkin's Law #39:The three keys to keeping a new manned space program affordable and on schedule: 1) No new launch vehicles. 2) No new launch vehicles. 3) Whatever you do, don't decide to develop any new launch vehicles.The Falcon Heavy is a new launch vehicle.What's that got to do with CCDev 2?
Quote from: A_M_Swallow on 04/23/2011 10:22 pmThe modification needed to man rate the EELV and add a LAS may be the equivalent of developing a new launch vehicle.Based on what?
LAS is not part of the launch vehicle.CCDev has nothing to with beyond LEOstop with these foolish posts