Don't mean to be rude but there's already a topic on thishttp://forum.nasaspaceflight.com/index.php?topic=25788.0
SpaceX - 80%Boeing - 70% (not driven to open up space like Musk, more dependent on NASA funding)Sierra Nevada - 30%Blue Origin - 95% (Bezos has deeper pockets than Musk and is as driven)
Cool, a thread where we can all pull numbers out of our butts.
Quote from: Jorge on 08/06/2011 09:42 pmCool, a thread where we can all pull numbers out of our butts.Well, one more thread where we can do that, anyway ... (the thing is, some numbers have points and corners -- they hurt! That's why it's such a relief to get 'em out of there)
The important thing is that none of 'em are 100% until they're flying, and we should not have retired the shuttle until that point. The clock is ticking (and the ISS is aging)....I think a question we may well be faced with is what happens when delays cause the overlap between commercial crew service entry and ISS retirement to evaporate?
At least we still have a manned spacecraft flying this time in the form of the ISS. You can counter that we were flying Skylab back then, but we didn't keep Skylab flying manned. Ironically, our last use of the Apollo capsule was the Apollo-Soyuz Test Project; the same Russian vehicle that will get our astronauts to the station this time around. If the political back then were better, I wonder if we would have asked the USSR to sell us rides on Soyuz in order for us to keep Skylab manned until shuttle was ready.
Here's my unscientific on a hunch listing of the odds of each CCDev contender actual making it into commercial flight service with actual launches over several years:SpaceX - 100% (unless something unforeseeable goes wrong)Boeing - 90% (my gut tells me Boeing would fast pull the plug if Congress drastically cuts the CCDev funding level)Sierra Nevada - 30%Blue Origin - 10%How would you place those odds?
A reliable and sustainable commercial crew service? Not higher than 50-50 for any company.And to say SpaceX is somehow more likely to accomplish reliable and sustainable crewed spaceflight than Boeing is really, really strange.
And to say SpaceX is somehow more likely to accomplish reliable and sustainable crewed spaceflight than Boeing is really, really strange.
CONgress
Quote from: AlexCam on 08/07/2011 07:30 amA reliable and sustainable commercial crew service? Not higher than 50-50 for any company.And to say SpaceX is somehow more likely to accomplish reliable and sustainable crewed spaceflight than Boeing is really, really strange. If you look at the manifest, you'd see that the SpaceX is planning on using the scheduled COTS Dragon launches as an opportunity to launch commercial satellites with a single launch opportunity, increasing the economics of the Falcon 9-Dragon system.NASA is just one customer. Other customers could be commercial satellites, as I mentioned above. Eventually other customers will join NASA for Dragon's unique cargo and HSF features. Seeing it this way, makes the economics of it a bit more sane.
I am not diminishing SpaceX's successes until now, I am merely pointing out that they have extreme cost overruns and schedule delays.
Boeing on the other hand might be an old-space company, but they have a record of delivering within budgets (if those are realistic) and within schedule.
Quote from: AlexCam on 08/07/2011 09:56 amI am not diminishing SpaceX's successes until now, I am merely pointing out that they have extreme cost overruns and schedule delays.Huh? Delays yes, like everybody else, but cost overruns?
Quote from: mmeijeri on 08/07/2011 10:01 amQuote from: AlexCam on 08/07/2011 09:56 amI am not diminishing SpaceX's successes until now, I am merely pointing out that they have extreme cost overruns and schedule delays.Huh? Delays yes, like everybody else, but cost overruns?The original COTS schedule was for 3 years with the demo flights in 2008. It has since been long extended and there has been quite a lot of money injected into their developing program as well.When SpaceX was awarded its COTS contract in 2006, the stated goal of the company was to not exceed a certain number of employees in order to control costs (at some point they mentioned 800, then 1000), currently their employee count is in the region beyond 1250 and rising.QuoteBoeing on the other hand might be an old-space company, but they have a record of delivering within budgets (if those are realistic) and within schedule.What about Dreamliner? What about KC-46? I think you are pulling this "information" from your nether regions.
Offhand, I would say that the hardest thing that they have to accomplish is simply the next step every time. ANd SpaceX has the great attitude of 'we can do it'.
Blue Origin=99% because Bezos is worth 18BN.
Quote from: PeterAlt on 08/07/2011 09:00 amQuote from: AlexCam on 08/07/2011 07:30 amA reliable and sustainable commercial crew service? Not higher than 50-50 for any company.And to say SpaceX is somehow more likely to accomplish reliable and sustainable crewed spaceflight than Boeing is really, really strange. If you look at the manifest, you'd see that the SpaceX is planning on using the scheduled COTS Dragon launches as an opportunity to launch commercial satellites with a single launch opportunity, increasing the economics of the Falcon 9-Dragon system.NASA is just one customer. Other customers could be commercial satellites, as I mentioned above. Eventually other customers will join NASA for Dragon's unique cargo and HSF features. Seeing it this way, makes the economics of it a bit more sane.Plans and execution are different things. Boeing has for decades proven that it is able to achieve success in complicated programs. SpaceX has unfortunately proven (once again in the history of modern aerospace) that for a smaller company it is extremely difficult to solve complicated tasks in a reliable and sustainable fashion. I am not diminishing SpaceX's successes until now, I am merely pointing out that they have extreme cost overruns and schedule delays. Boeing on the other hand might be an old-space company, but they have a record of delivering within budgets (if those are realistic) and within schedule.Having said that, any speculation which company will ultimately succeed in crewed spaceflight is just that - speculation. However, to give SpaceX a higher chance in succeeding than Boeing ignores everything that has happened in spaceflight in the US until now.
Quote from: M_Puckett on 08/08/2011 01:39 amBlue Origin=99% because Bezos is worth 18BN. Sorry, but that's a pretty naive argument. That's like saying because Bill Gates is worth XX billions, he can design a Microsoft rocket and it will assuredly fly.Money alone does not make a design work.