Bit of a round up of where things stand post SES-8.http://www.nasaspaceflight.com/2013/12/ses-8-success-trajectory-future-spacex-possibilities/All positive news, so I doubt anyone will care too much for this.
I've seen the reference to three missions needed to certify the F9 1.1 for NRO jobs,, but haven't seen the specifics. Since there are a lot more than three planned before the first NRO launch, how would a failure somewhere along the line affect that?
The CASSIOPE mission also involved the first “boost back” test of the first stage, while sources note there was also a boost back test during the SES-8 mission, or at least the restart of the first stage post staging.
I'll just point this out (was on L2 earlier)QuoteThe CASSIOPE mission also involved the first “boost back” test of the first stage, while sources note there was also a boost back test during the SES-8 mission, or at least the restart of the first stage post staging.So, that's something new Let the discussion and video analysis commence! Does any of the videos show a cloud of puff that looks different (some thrusters vs at least one M1D) from the others? I for one haven't been able to find it on any of the downrange videos.
Great article again Chris! Although it does worry me if they lose one rocket, it could bring down the entire house of cards.
Quote from: Silmfeanor on 12/08/2013 08:27 amI'll just point this out (was on L2 earlier)QuoteThe CASSIOPE mission also involved the first “boost back” test of the first stage, while sources note there was also a boost back test during the SES-8 mission, or at least the restart of the first stage post staging.So, that's something new Let the discussion and video analysis commence! Does any of the videos show a cloud of puff that looks different (some thrusters vs at least one M1D) from the others? I for one haven't been able to find it on any of the downrange videos.I think that a relight would happen further downrange, several minutes after most of the videos lost sight of the stage. We can clearly see post-separation maneuvering in preparation for a re-ignition. - Ed Kyle
Quote from: edkyle99 on 12/08/2013 04:26 pmQuote from: Silmfeanor on 12/08/2013 08:27 amI'll just point this out (was on L2 earlier)QuoteThe CASSIOPE mission also involved the first “boost back” test of the first stage, while sources note there was also a boost back test during the SES-8 mission, or at least the restart of the first stage post staging.So, that's something new Let the discussion and video analysis commence! Does any of the videos show a cloud of puff that looks different (some thrusters vs at least one M1D) from the others? I for one haven't been able to find it on any of the downrange videos.I think that a relight would happen further downrange, several minutes after most of the videos lost sight of the stage. We can clearly see post-separation maneuvering in preparation for a re-ignition. - Ed KyleNot if they were testing the boost-back/RTLS burn instead of the max-q reduction burn. Correct me if I'm wrong, but when they actually do RTLS, wouldn't they want to do the boostback burn ASAP, to minimize the needed delta v to get the horizontal velocity to get the stage heading back to the launch site?On flight 6 the first relight, the max-q reduction burn, appears to have happened just as the stage started to enter the atmosphere, allowing for some drag to settle the propellant. The second burn, the hoverslam burn, though unsuccessful, would have had even more drag to settle the propellant. But a boostback burn would be well above the atmosphere, so they would need some other method to settle the prop in the tanks, or have a clever baffling/zero-g prop management system in place. Since they did not test the zero-g prop settling on flight 6 (no boostback burn), I think it is a reasonable guess to say that is what they were testing on this flight, to get a data before the try to bring the stage back for real on CRS-3, especially since they only need to know whether the engines successfully relight and then they can be shut off, requiring only a very small amount of propellant.
I'm on Oahu today (rough duty but I needed the miles!) and in my room overlooking Diamond Head is a hair dryer. It says on the side that it is an 1650 watt dryer.The article says that SES-8 produces about 5KW of power... Am I getting confused, or is this bird (typical of other birds in its size class in many ways) providing sophisticated communication services to a large chunk of Asia on... 3 hairdryers worth of electricity?Modern electronics is awesome The article was really superb, it puts so much of the story together in one easy to digest chunk. needs to be shared widely!
Quote from: AndyX on 12/08/2013 02:26 pmGreat article again Chris! Although it does worry me if they lose one rocket, it could bring down the entire house of cards.That is a risk. It's a risk for everyone, but I think SpaceX fans are more likely to act like a boy band splitting up, yelling "I never thought that would ever happen."The higher you place something on a pedestal, the harder the fall.You just don't get that risk with Atlas V.
Great article Chris and thanks for the quality coverage.
Great article Chris! Still hoping they get one more off this year, but it looks a little tight... Good luck to them....
If they lose one rocket it will be a sales persons nightmare and will drive insurance costs up, but they can cope with that. If they lose 2 in a row or 2 out of the next 3, it will be problematic and some clients might book a flight with the competition.
Both EELVs have failed once.
Quote from: edkyle99 on 12/09/2013 12:27 amBoth EELVs have failed once.You know, ULA directly states that Atlas V has "achieved 100% mission success".I know what each of you means, and I'm not sure I wouldn't count both of you as correct.
The article says that SES-8 produces about 5KW of power... Am I getting confused, or is this bird (typical of other birds in its size class in many ways) providing sophisticated communication services to a large chunk of Asia on... 3 hairdryers worth of electricity?
Quote from: IRobot on 12/08/2013 10:01 pmIf they lose one rocket it will be a sales persons nightmare and will drive insurance costs up, but they can cope with that. If they lose 2 in a row or 2 out of the next 3, it will be problematic and some clients might book a flight with the competition.Change the "If" to "When", because every launch vehicle in the orbital business eventually fails.
Quote from: edkyle99 on 12/09/2013 12:27 amQuote from: IRobot on 12/08/2013 10:01 pmIf they lose one rocket it will be a sales persons nightmare and will drive insurance costs up, but they can cope with that. If they lose 2 in a row or 2 out of the next 3, it will be problematic and some clients might book a flight with the competition.Change the "If" to "When", because every launch vehicle in the orbital business eventually fails. I was being pessimist to the point of 1 failure in the next 6 launches.
The article says that SES-8 produces about 5KW of power... Am I getting confused, or is this bird (typical of other birds in its size class in many ways) providing sophisticated communication services to a large chunk of Asia on... 3 hairdryers worth of electricity?Modern electronics is awesome
That was an excellent article, as a great overview of the situation, now (Dec 20th forward, MAINTENANCE!!) and for the future... Thanks Chris, at least ONE person cares for it: me!!
In regards to the CRS1 mission,the loss of an engine did result in loss of satellite but I thought that was more to do with NASA deciding there was slight risk to ISS if 2nd stage tried to deliver satellite to its orbit. There was 95% probability the satellite would have been delivered successfully, NASA required 99%. Primary mission of CRS1 was a success. It did demostrate that the F9 could complete its mission(primary anyway) after an engine failure. Be interesting to know how the insurance companies viewed.
Quote from: TrevorMonty on 12/09/2013 07:47 amIn regards to the CRS1 mission,the loss of an engine did result in loss of satellite but I thought that was more to do with NASA deciding there was slight risk to ISS if 2nd stage tried to deliver satellite to its orbit. There was 95% probability the satellite would have been delivered successfully, NASA required 99%. Primary mission of CRS1 was a success. It did demostrate that the F9 could complete its mission(primary anyway) after an engine failure. Be interesting to know how the insurance companies viewed. Ed has more exacting criteria. Nothing wrong with that if - as he does - you state your criteria upfront and everyone can see the basis of your judgements. One is then free to agree or disagree as convenient!
Thanks for the article!Interesting mission patch.
Quote from: go4mars on 12/09/2013 05:06 amThanks for the article!Interesting mission patch.Thanks!Was one of the NROL patches. The space octopus got a lot of attention, so given that part of the article was about EELV stuff, out came another NROL patch I like!
That 5kw actually an "up to" number for that bus. There are about 50 different ways for transponders to serve multiple customers and I don't know which ones SE-8 uses, but there's no way the total rf output would ever even reach 500 watts, and probably less. It doesn't do any good to have a thousand watt transmitter when you're talking to an 8 watt VSAT on the surface.
Quote from: Nomadd on 12/09/2013 05:20 pm That 5kw actually an "up to" number for that bus. There are about 50 different ways for transponders to serve multiple customers and I don't know which ones SE-8 uses, but there's no way the total rf output would ever even reach 500 watts, and probably less. It doesn't do any good to have a thousand watt transmitter when you're talking to an 8 watt VSAT on the surface.There is always a reason for more power output, and that is to push through interference.
And how is this debate about SES-8 and the future of SpaceX?
There is now T-6 to launch and then CRS-3. T-6 is the 3rd launch for F9 v1.1 and IIRC certifies the vehicle for DoD missions. So I wonder how many new contracts are going to be signed based on the SES-8 success and then if T-6 is also successful, what DoD contracts become available? And perhaps more relevant is how much capacity does SpaceX have in their manifest for more contracts?Interesting year coming up.
For more information see Launch Services New Entrant Certification Guide, GAO, February 2013.
Quote from: joek on 12/10/2013 02:54 amFor more information see Launch Services New Entrant Certification Guide, GAO, February 2013.This one could be a challenge "new entrants must be able to launch aminimum of 20,000 pounds to low earth orbit from specific Air Force launch facilities (versusfacilities the new entrants currently use.) "
Quote from: IRobot on 12/08/2013 10:01 pmIf they lose one rocket it will be a sales persons nightmare and will drive insurance costs up, but they can cope with that. If they lose 2 in a row or 2 out of the next 3, it will be problematic and some clients might book a flight with the competition.Change the "If" to "When", because every launch vehicle in the orbital business eventually fails. Both EELVs have failed once. Ultra-reliable Araine 5 has failed four times. World's most reliable R-7/Soyuz failed twice in 2011 alone. Proton and Zenit both failed spectacularly this year. STS failed, sadly. Even Falcon 9 itself (though not v1.1) has failed. The fourth Falcon 9 lost an engine during ascent, preventing an upper stage restart that prevented placement of the Orbcomm prototype satellite into its planned orbit. The satellite quickly reentered the atmosphere, a total loss. As for the willingness of SpaceX fans (and potential customers) to endure failures, I'll merely point out that the first three Falcon 1 launches (and first four Falcon 1 vehicles) all failed or were damaged on the ground and that it took SpaceX seven years to finally put one small payload into orbit. Their support only seemed to grow through the troubles. - Ed Kyle
I'll also speculate his rockets will prove much more reliable than Delta / Atlas / Ariane
I'm the biggest SpX amazing people here, but.It's physically impossible to be "much more reliable" than Atlas - that would require reliability above 100%
You're points are logical, but let me add a few counter points:1 - Having no solids allow for F9/FH be completely tested to a much larger extent (static fires test everything on Stage 1, and hold before release tests everything that can be tested on a 2 second static fire)2 - Elon's computer guy mentality means his rockets have a paranoid level of diagnostics3 - Parsing Elon's commentary, he clearly doesn't care if every launch has multiple scrubs, better safe than sorry, that's a very positive attitude4 - Also parsing his commentary, my impression is they're monitoring engines on static fire / hold before release not based on acceptable mission but on accepting nothing even slightly out of exact performance specs, I'm no rocket expert to compare with other rockets5 - F9 v1.0 had one engine failure (out of 50 engines counting 2nd stage), and it's stated that F9R engines are substantially more reliable6 - Elon both has his money on the line and is essentially supervising everything, and given his impressive track record, I'll also speculate his rockets will prove much more reliable than Delta / Atlas / Ariane7. While I am a SpaceX amazing people, I believe this is a rational analysis of their perspective.
Even Falcon 9 itself (though not v1.1) has failed. The fourth Falcon 9 lost an engine during ascent, preventing an upper stage restart that prevented placement of the Orbcomm prototype satellite into its planned orbit. The satellite quickly reentered the atmosphere, a total loss. - Ed Kyle
An engine out is a fault, but not a failure if the primary mission succeeds....
IMO unreasonable and unfortunate) Nasa rules
Quote from: edkyle99 on 12/09/2013 12:27 amEven Falcon 9 itself (though not v1.1) has failed. The fourth Falcon 9 lost an engine during ascent, preventing an upper stage restart that prevented placement of the Orbcomm prototype satellite into its planned orbit. The satellite quickly reentered the atmosphere, a total loss. - Ed KyleAn engine out is a fault, but not a failure if the primary mission succeeds.... The Falcon 9 engine out resulted in primary mission success.. the COTS payload was placed in the proper orbit..As to the Orbcomm sat...There was plenty of fuel available for 2nd stage restart to get the Orbcomm to the proper orbit.. but the restart was forbidden by (IMO unreasonable and unfortunate) Nasa rules, not Falcon capability.The Orbcomm was not a 'total loss'... before orbit decay, Orbcomm was able to test it's various systems, enough to approve construction of the remainder of the sat series.... which actually was it's purpose.
Fortunately, Orbcomm was able to get the majority of the data that the satellite was being sent aloft to gather, so while it did not get into the proper orbit and eventually re-entered, the satellite did accomplish most if its mission.
Quote from: clongton on 12/10/2013 01:32 pm Fortunately, Orbcomm was able to get the majority of the data that the satellite was being sent aloft to gather, so while it did not get into the proper orbit and eventually re-entered, the satellite did accomplish most if its mission.Then why did they file an insurance claim?
Also, to disagree on one point, I think the "barely complex" threshold is comfortably met by Dragon re-entry. Unless you see a lot of spacecraft returning intact from orbit that I haven't noticed.