SpaceX's First Falcon Heavy Launch Will Now Take Place In 2018 (engadget.com)
The launch of SpaceX's Falcon Heavy rocket has been delayed to 2018. In an email to Aviation Week, SpaceX President Gwynne Shotwell said, "We wanted to fly Heavy this year. We should be able to static fire this year and fly a couple of weeks right after that." Engadget reports: The static fire test will be the first time that all of Heavy's 27 Merlin engines will be fired at once. And if all goes well there, Falcon Heavy should be ready for launch within the first few weeks of 2018. There have been multiple launch delays with Heavy, which Elon Musk has attributed to the development of such a large and powerful rocket being "way, way more difficult" than SpaceX expected. "Falcon Heavy requires the simultaneous ignition of 27 orbit-class engines," Musk said at the ISS R&D conference in July. "There's a lot that can go wrong there." And because of that, Musk has been very clear about where everyone's expectations should be going into Falcon Heavy's first launch. "There's a real good chance that it does not make it to orbit. I hope it gets far enough away from the launch pad that it does not cause pad damage -- I would consider that a win," he said.
"I hope it gets far enough away from the launch pad that it does not cause pad damage" - I have a similar wish for this Presidency.
What's the big woop? We were doing this in 1942. And it worked, ask the British.
There's a Morton's Fork for project managers: give repeated updates to a changing schedule, slips and all, or to give a vague window that conceals these schedule slips. The benefit of the former is that onlookers can get an increasingly precise estimate of final delivery, whereas the benefit of the latter is that it appears more professional. The downside of the former is a constant request for updates (which one feels obligated to answer) and doom and gloom from onlookers every time the schedule slips; for the latter, it's that few people know when the project will be completed until it's almost done and a release date is easy to nail down, and it's difficult to plan around such a nebulous release window. Those who choose transparency often are stressed out by the scrutiny, sometimes wishing they maybe hadn't been so transparent.
Corruption is convincing someone that the selfless ideal is the same as their selfish ideal.
Anyone lining up to criticise SpaceX for the delays to Falcon Heavy needs to be reminded that the current iteration of the standard Falcon9 rocket is now more powerful on its own than the original specs for Falcon Heavy.
Several of the payloads that were originally booked with FH have already been launched on single F9s.
So the Falcon Heavy that is being rolled out now is a substantially more significant piece of hardware than it would have been if we'd been watching this event two or three years ago.
The lessons learned from developing Falcon Heavy will also pay forward into the development process for BFR. Even if FH never flies again, the process was still worth it.
As Elon stated in the quoted comment, the complexity of this launch is pretty significant. Although it must be possible to measure the respective thrust output from 27 different rockets simultaneously [i.e. torsion gauges across your rocket superstructure], translating that in to real-time simulation that balances thrusts for both trajectory and vehicle integrity are going to be hard.
Whilst this launch is certainly experimental, SpaceX will want to get the maximum possible return on that investment - it's their USP after all - and that means having a good degree of confidence that it will work. Something that blows up on the pad after giving half a second of telemetry isn't much use to anyone except the afternoon news shows and YouTube. Well, and ULA.
This is all about balancing the need to test [in order to get data] with the need to test successfully [in order to get data]. And although the cost of an F9 Heavy launch [to SpaceX] certainly won't be three times the cost of a regular F9 launch, it won't be cheap, either. If regular F9 launches are $60MM, then the cost of F9H must be at least in the order of $120MM or so.
Worth taking the time to give it a reasonable chance of success.
Brings out the Tesla because he wants to cut pollution and save the planet, sets up space company which has a rocket that'll burn a million pounds of fuel in a matter of seconds just to send stuff to a space station that just sits there spinning round the globe.
I only please one person per day. Today is not your day. Tomorrow isn't looking good either. - Scott Adams
Well, as was shown on the TV show "Young Sheldon" on Thursday night, NOW we know how Musk got the technology to do what he's doing. LOL
Agree with your analysis, but would add that "the cost of getting methane from natural gas" has to include the environmental impact...
And as for the cost of synthesizing methane using carbon dioxide and electricity, well, Musk does just happen to have another couple of companies, one of which produces solar panels and another which produces huge storage batteries...
When you think about that, you realise that he's thinking seriously long-term, because he's actually hedging against the inevitable increase in the cost of natural gas with time - i.e. as it becomes more and more scarce.
Use lots of struts
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Sorry, I'm only a 1336 h4x0r.
With a few careful observations, you can begin to understand that the
heliocentric model is a lie, and you live on a flat plane.
Solar Eclipse: https://vimeo.com/230976895
Corona not shaped in a spherical configuration; orients toward Earth. Corona lines can be observed to move faster than the speed of light. Light of the corona can be observed on the back of the moon. Light of the chromosphere can be observed on the back of the moon. Light of protuberences can be observed on the back of the moon. Sun and Moon same size and near. Wiki: Allais Effect
Lunar Eclipse: https://vimeo.com/92378881
Irregular shadow shape, progression. Shadow is black, then changes color to reddish: Shadows don't change color. Moon glow of uneclipsed portion increases as shadow becomes reddish, detail lost. Moon has no rotation(see Nikola Tesla): we always see the same face. Moon emits own light. Craters not from impacts: Too round.
No model of the lunar eclipse correctly captures it:
https://www.washingtonpost.com/news/capital-weather-gang/wp/2014/10/06/why-does-the-moon-turn-red-during-a-lunar-eclipse/
https://www.timeanddate.com/eclipse/in/usa/scottsdale?iso=20140415
Next lunar eclipse: January 30/31, 2018 North America
If each engine is x% reliable against kabooming the whole mess, then the chances of success are:
% Chance of success
99 76%
98 57%
97 43%
96 33%
95 25%
There is a rather dismal history on many-engine rockets. The USSR's attempt at that failed rather miserably.
I'd rather they spend a few months extra to get the launch right rather than launch before they're ready and risk a failure. Launching despite warnings from engineers/known dangers has resulted in more than a few NASA rocket failures. And unlike SLS taxpayers aren't on the hook for the overtime.
The Merlin engine has proven to be very reliable. The fact that they get to recover most of the engines and inspect them should help to keep reliability high, or even improve it. Also keep in mind the multiple engine configuration also allows the rocket to complete the mission successfully if one of the engines fails.
You assume that an engine failure dooms the mission. The whole point is engine-out capability that doesn't. In such a case, the reliability increases the more engines you have.
The problem with the N1 was a combination of A) its engine-out failures tended to be cascading (aka, the engines were not properly protected from each other), B) its rate of engine-out failures was huge, C) lots of miswiring, and D) overcautious software that killed missions it shouldn't have, and outright destroyed a launch pad when it didn't need to.
Pinkypants -- my favorite!
You're basing your numbers on 1960s level tech for an expendable launcher? We've made a few advancements since then. In fact SpaceX's failure tolerance designs have already at least partly proven themselves with an engine exploding on a Falcon 9 flight but the rocket continuing on to orbit for a mostly successful launch (a secondary payload was lost but the primary made it to orbit). And if I'm recalling correctly that has been the only engine failure that is known to have occurred out of over 400 (44 launches x 9 main stage engines plus one second stage engine).
I hope Elon has done his homework. The Soviets failed miserably with 30 engines in the first stage of their N1 https://en.wikipedia.org/wiki/N1_(rocket). All four launch attempts failed spectacularly. Wikipedia also says after the first launch failure: "All subsequent flights had freon fire extinguishers installed next to every engine." Doesn't sound like a good design to me.
Circle the wagons and fire inward. Entropy increases without bounds.
I love it!
"I hope it gets far enough away from the launch pad that it does not cause pad damage -- I would consider that a win,"
Don't forget about faulty fuel line plumbing, I believe several of the failures were caused (or at least exacerbated) by fuel lines shattering after unexpected reverberations or attempts to shutdown failed engines resulting in fires in the engine section. The Russians did some amazing things in space travel, but then the head of their program died during routine surgery and everything seemed to fall apart.
It's not really engine outs that doom launches. It's engine booms.
Nobody intentionally launches an unreliable rocket, and it's true the Merlin engine has a good track record. It also hasn't been used in a configuration where so many of them are running in close proximity. That's what the Soviets had a lot of problems with, even though they have always built reliable engines, even back then.
A proper engine design can't "boom". It can burn violently until propellant can be cut off (you can't really stop that, when you're dumping fuel and oxidizer together), but if you design properly, you prevent backflowing "hammer" effects in feedlines, have proper debris catching around turbopumps, etc.
SpaceX has lost Merlins in flight before. No boom, at least so far :) A new Block 5 development engine was initially reported to have exploded on the test stand, but it turned out to be a failure of the test equipment.
Pinkypants -- my favorite!
They actually lost an engine and completed the mission on one of their earlier launches ( https://www.youtube.com/watch?...) .
From what I've read, there's a chance they might even be able to make it to orbit while losing two of them, depending on how heavy the payload is.
And since they're planning all three cores of the FH, there's going to be more margin to bring the payload up in expendable mode if an engine fails.
So the question is, do you prefer the chance of losing one big engine and the whole mission, or betting that you won't lose 2-3 engines on the same launch (For F9, I'm not sure how many it would be for FH).
Of course, SpaceX has other considerations with the number of engines they use, like the ability to use fewer of them for landing, and general economies of scale for production and testing.
REG: Yeah. All right, Stan. Don't labour the point. And what have they ever given us in return?!
XERXES: The aqueduct?
REG: What?
XERXES: The aqueduct.
REG: Oh. Yeah, yeah. They did give us that. Uh, that's true. Yeah.
COMMANDO #3: And the sanitation.
LORETTA: Oh, yeah, the sanitation, Reg. Remember what the city used to be like?
REG: Yeah. All right. I'll grant you the aqueduct and the sanitation are two things that the Romans have done.
MATTHIAS: And the roads.
REG: Well, yeah. Obviously the roads. I mean, the roads go without saying, don't they? But apart from the sanitation, the aqueduct, and the roads--
COMMANDO: Irrigation.
XERXES: Medicine.
COMMANDO #2: Education.
REG: Yeah, yeah. All right. Fair enough.
COMMANDO #1: And the wine.
FRANCIS: Yeah. Yeah, that's something we'd really miss, Reg, if the Romans left. Huh.
COMMANDO: Public baths.
LORETTA: And it's safe to walk in the streets at night now, Reg.
FRANCIS: Yeah, they certainly know how to keep order. Let's face it. They're the only ones who could in a place like this.
REG: All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a fresh water system, and public health, what have the Romans ever done for us?!
XERXES: Brought peace?
REG: Oh. Peace? Shut up!
HF was already delayed to late Decembers. Workers would be stressed or distracted by holiday activities then.
Then Russell's Teapot would be a a real thing!