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After a decade, NASA’s big rocket fails its first real test

arstechnica.com

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Re: After a decade, NASA’s big rocket fails its first real test

#121

Earlier quoted context omitted.

> A lack of failure is a sign of a lack of trying anything new. I may just have blindspots in my history knowledge here, but the moon landing was pretty much an unqualified success, no?

It was a pyrrhic success. It was so expensive it was a dead end.

Its actually wasn't. If you actually look at the cost involved. Putting all the funding into Shuttle simply made the Apollo architecture to expensive.

A much, much, much, much better strategy would have been to keep the Appollo hardware and evolve it. Plan for 1-2 Saturn V flights every year. Use the F1 engine on a smaller vehicle (like Saturn 1B) and use that vehicle as the work horse for both the military and NASA.

This would have allowed them to mass produce the engine, reuse the same pads. It would have given them much more capability compared to Shuttle and it would have been considerably cheaper.

It was bad engineering choices, not simply the budget. They cut the wrong things.

Re: After a decade, NASA’s big rocket fails its first real test

#122
post #9
post #2

I’m not a rocket scientist and I also don’t want to bash NASA, but the size of the budget here coupled with the lack of transparency about the failure is in stark contrast with what we’ve seen out of both SpaceX and Blue Origin. Maybe what NASA is trying to do here from an engineering perspective is much, much harder. I also feel there may be unjustified spin in this article. But to an untrained eye this article sure…

Nothing about SLS makes sense to me economically. F9 Launch Cost (without reuse): $65mm FH Launch Cost (without reuse): $150mm SLS Launch Cost: >$2,000mm How does anyone square this arrangement? What saving graces does SLS have (from an engineering perspective) compared to the SpaceX programs? There are certainly a lot of downsides and I would be really disappointed to learn that there are no upsides.

Its actually much worse then that. These are not the 'cost' for F9/FH, that is the price. The cost of these launch is like 1/2 to 1/3. Part of the price is also amortizing past development cost.

In the SLS launch non of that is included. If you take into account the full development cost and amortize them over all the launches (and calculate the interest on government debt) the price is actually way higher then what you have listed.

- SLS is more powerful then FH but not by as much as people think.

- SLS is human-rated and FH is not, but that is mostly because there is no reason to human-rate the FH.

- SLS has the potential to be extend significantly to outperform FH by a much larger margin but that will cost another X billion and another Y years.

- SLS was supposed to be cheap by using lots of legacy technology. So in reality Falcon series are actually pretty much newer and more modern in pretty much every design aspect. Of course when SLS was designed Falcon was 'unproven' and the parts of the SLS were 'proven'. However of course this has totally reversed by now.

SLS rocket is simply a bad design. It was the outcome of a bad process partly pushed by congress on NASA and partly by NASA engineers own failure to analyse the situation properly. A large part of this is the believe to reuse 'proven' technologies and more importantly to reuse that same workforce.

Because it used Cost+ contracting the contractors have no intensive what so ever to perform well. The keep getting their bonus payments for good performance even, something that independent government reviews has pointed out multiple times.

So to sum up, there is very little to almost nothing that is gained by SLS. Its a huge part of the NASA budget every year that could be invested in amazing developments. You could fully fund the lunar lander program AND do other preparation for moon bases for example.

Edit: This talk form 2011 is quite interesting. I often call it the SpaceX antithesis talk. He even mentions SpaceX a couple of times and references them without naming them.

He quite literally says 'if we can't make this affordable they will from in future just let SpaceX do it' and he made it clear their main design goal is affordability and having a program that could meet milestones. Well, that didn't work out so much. See:

- https://www.youtube.com/watch?v=IweLWCBHpUE?t=0

Re: After a decade, NASA’s big rocket fails its first real test

#123
post #9

Earlier quoted context omitted.

Nothing about SLS makes sense to me economically. F9 Launch Cost (without reuse): $65mm FH Launch Cost (without reuse): $150mm SLS Launch Cost: >$2,000mm How does anyone square this arrangement? What saving graces does SLS have (from an engineering perspective) compared to the SpaceX programs? There are certainly a lot of downsides and I would be really disappointed to learn that there are no upsides.

It fits with the OP theory of "an expensive jobs program for Alabama, Texas and Florida." If you think of that as the actual purpose, this is a successful project.

Taking useful rocket scientists, engineers, programmers, etc, plus all of their blue collar support staff from away from productive industry sounds like the worst possible "jobs" program in the world.

Calling it a success simply because the money was spent without considering opportunity costs [1] is just bad money management. It's how you end up with these blackhole gov programs in the first place.

Extremely wasteful space programs at least typically get justified as also a) 'inspiring' kids into STEM + b) providing national pride. But when all you get in return is decades of doing nothing interesting I doubt many kids will be inspired. And after so many years and getting blown by competitively by private industry turns it into a national embarrassment (even things exploding is more interesting than what they've produced the last few decades with this program).

When you factor in the opportunity cost, aka the alternative ares NOT getting "jobs programs", or rather the capital investment, like infrastructure or healthcare or a hundred other possibilities. Things which can employ plenty of blue collar rust-belt workers into jobs that directly support the needs of modern industry who funds these tax paid adventures (ie, transit/railways, electric grid, broadband, etc). Stuff that supports and underpins the new 'knowledge based economy' instead of drawing resources away from it.

Not to mention providing a stopgap to a 'lost generation' of former typically-unionized industrial workers who couldn't compete globally after the 1980s when they could have been provided some critical time while their kids adapt and get education/skills needed for the new self-sustaining, productive, and heavily automated/software driven industries that the developed world has transitioned too.

[1] https://www.investopedia.com/terms/o/opportunitycost.asp

Re: After a decade, NASA’s big rocket fails its first real test

#124

Earlier quoted context omitted.

Not really a setback, because there was no place for that technology. Lack of space reactors wasn't and isn't a roadblock. Had that development continued it would have been largely wasted, and the knowledge gained would have decayed away.

It easily functions as a self-breeding terrestrial reactor that reaches criticality with 1/500th to 1/1000th the fuel of existing nuclear reactors (~20kg). The design requires active power that shuts down the reactor on failure, making any accident a complete nonevent. It can even be kickstarted without huge amounts of enriched fuel with the addition of a neutron gun (which they used to test the design without nuclea…

The requirements for a space reactor, and for a terrestrial reactor, are radically different. No space reactor will make sense for terrestrial power generation. The temperatures are different, power density is different, safety cases are different. A 20kg reactor likely needs highly enriched fuel (space reactors are typically fast reactors too, so we're talking about something that's almost a bomb there.)

An external neutron source does not greatly change the needed enrichment (since any practical subcritical reactor would still need k fairly high, so it is only a bit subcritical.)

Re: After a decade, NASA’s big rocket fails its first real test

#125
post #119

Earlier quoted context omitted.

Congress and the Nixon administration trapped NASA in LEO. There was extensive planning inside NASA for applications of Saturn-Apollo technologies [0]. Two of the ambitious ones were a manned Venus flyby [1] and a permanent Lunar base [2]. After the Apollo I fire Congress lost its appetite for space and slashed NASA's budget [3]. The Nixon administration went all-in on the Space Shuttle which ate up all of NASA's man…

Had NASA engineers actually build a better design for Space Shuttle, lots of budget would have been available to do more. The Space shuttle could have done much more much better things if it was designed differently.

And had my father had two X chromosomes, he'd have been my mother. There has to be a reason to entertain contrafactuals; you can't just state them and assume that outcome would have been likely.

Re: After a decade, NASA’s big rocket fails its first real test

#126
post #121

Earlier quoted context omitted.

It was a pyrrhic success. It was so expensive it was a dead end.

Its actually wasn't. If you actually look at the cost involved. Putting all the funding into Shuttle simply made the Apollo architecture to expensive. A much, much, much, much better strategy would have been to keep the Appollo hardware and evolve it. Plan for 1-2 Saturn V flights every year. Use the F1 engine on a smaller vehicle (like Saturn 1B) and use that vehicle as the work horse for both the military and NASA.…

That wouldn't have been continuing Apollo; that would have been salvaging something from the effort. I do agree it (or something else, like Schnitt's MCD booster concept) would have been far better for the country, even if they wouldn't have gotten Nixon as many votes in California.

Re: After a decade, NASA’s big rocket fails its first real test

#127
post #9

Earlier quoted context omitted.

Nothing about SLS makes sense to me economically. F9 Launch Cost (without reuse): $65mm FH Launch Cost (without reuse): $150mm SLS Launch Cost: >$2,000mm How does anyone square this arrangement? What saving graces does SLS have (from an engineering perspective) compared to the SpaceX programs? There are certainly a lot of downsides and I would be really disappointed to learn that there are no upsides.

Can Falcon Heavy launch payloads with a wider diameter? I assume they’d have to build an additional adapter to handler wider payloads.

Do we need payloads with wide diameter?

Re: After a decade, NASA’s big rocket fails its first real test

#128
post #32
post #2

I’m not a rocket scientist and I also don’t want to bash NASA, but the size of the budget here coupled with the lack of transparency about the failure is in stark contrast with what we’ve seen out of both SpaceX and Blue Origin. Maybe what NASA is trying to do here from an engineering perspective is much, much harder. I also feel there may be unjustified spin in this article. But to an untrained eye this article sure…

As if SpaceX has delivered anything that isn’t: a) (effectively) government funded and b) built on the back of decades of NASA engineering effort. Blue Origin hasn’t actually done anything.

You are very wrong about this actually.

SpaceX funded most of the Falcon 1 program themselves. The DoD was one early costumer.

SpaceX got some funding for Commercial Cargo program but that was mostly for the capsule, it didn't fully fund the Falcon 9.

The whole Falcon 9 improvement, such as Merlin 1D engines and all the other improvements were funded from SpaceX themselves.

The same goes for the complete SpaceX re-usabilitly program.

Under the Commercial Cargo contract part of that money was for human rating the Falcon 9 but is mostly about paper work and certification. A few issues were addressed that were financed with this contract. That money was for the capsule.

The Raptor program was a SpaceX own development. They got a small grant from the air force for a small Raptor version but that is a tiny part of the program and the current Raptor is very different. All of that was done without any funding from government.

The complete Starship program was funded by SpaceX themselves until last year when they got comparatively small amount for the Starship as a Moon lander study, but not nearly enough to fund the program.

The complete Starlink program was funded and developed by SpaceX without any government contracts.

Its flat out false to say that everything SpaceX has done was government funded. SpaceX has and had many commercial flights and has multiple rounds of investment of private money raised.

In reality SpaceX very likely bit to low for both CRS and for CommercialCrew. SpaceX had to invest private funds to get these programs operational. Boeing considered SpaceX bid so low that it would be impossible for SpaceX to finish the capsule and reasoned that when that happened they could also ask for more money, but SpaceX didn't ask for more money and finished the project.

And the argument that it all builds on decades of NASA engineering effort, well that is partly true. But you could just as well argue that Space build on all engineering effort of humanity.

NASA or its contractors have never even come close to making an engine so operationally cheap as the Merlin, or an engine that was as reusable as Merlin. Nothing NASA has ever done is close to as impressive as Raptor (RS-25 is neat design but production and cost nightmare). NASA has not build a cargo or crew capsule in 50 years. NASA has not managed to design a new rocket in 50+ years. NASA own attempts at rocket development have universally failed.

NASA never managed anything close to capturing a reusable orbital booster. Programs like DC-X are not in the same league.

People need to stop claiming that SpaceX is simply a couple guys who found some drawings at NASA and said, he we can copy that. SpaceX has done things NASA was not able to even with budgets 10-50 times higher. Most of the things SpaceX profited from were done decades ago.

And in the opposite direction it is actually the case that NASA learned a huge amount from SpaceX as well. NASA got full access into Space re-usability program like the engines, super-sonic retro-propulsion. SpaceX has the first data on pusher escape systems. Full-Flow Stage Combustion engine are now something NASA can study because of the Moon Lander program. SpaceX way of doing software development have very much changed NASA approchs as well.

And all of that is before we consider the organizational changes at NASA that happened directly because of SpaceX. Many NASA engineers have talked about how contact with SpaceX directly changed their perspective and how they tried to bring this culture into NASA. Dan Rasky is one good example of this, his talks on the subject are informative.

What makes SpaceX (and in a different way BlueOrigin) different is exactly that they go and get their own funding for when they want to work on a project. If government has some contracts open that they can use their technology for they are happy to do it. Eventually government will fly regularly with Starship, but that is different from SpaceX Starship program being funded by government.

Re: After a decade, NASA’s big rocket fails its first real test

#129
post #3

SLS is often jokingly referred to as the Senate Launch System for good reason. Its bloated budget and insistence on reusing space shuttle components means that it’s more a jobs program, than a serious attempt at building a launch vehicle.

It's not like they actually sent a member of Congress into space in 1985.... https://en.m.wikipedia.org/wiki/STS-51-D

Never heard of that, thanks. Jake Garn is a pretty interesting character. City mayor, Senator, navy pilot with thousands of flying hours. Headed the Senate appropriations committee for NASA and wrangled himself a place on a Shuttle mission. Born in 1932 and still alive despite donating a kidney to his daughter in the 80s. Quite a life.

Re: After a decade, NASA’s big rocket fails its first real test

#130
post #11

Earlier quoted context omitted.

Great comparison of SLS vs. Starship: https://www.youtube.com/watch?v=KA69Oh3_obY Key points: https://i2.wp.com/everydayastronaut.com/wp-content/uploads/2... Mass to the Moon: - Saturn 5: 49 metric tonnes - SLS: 43 metric tonnes - Starship: 156 metric tonnes Price per launch: - Saturn 5: 1.2B dollars - SLS: 0.875B dollars - Staraship: 0.1B dollars worse case scenario (Elon aims at 0.002B$) Price per kg: - Satrun 5: 2…

>> Staraship: 0.1B dollars worse case scenario (Elon aims at 0.002B$) Lol. No. That is beyond pipe dream territory. There a innumerable costs associated with spacelaunch that have absolutely nothing to do with reusability. Range closures. Payload integration. Regulatory compliance (ie safety). Telemetry. That USAF person in the back of the room with their finger on the destruct button. That stuff doesn't happen for f…

SpaceX is already launching for less then 100 million. You don't need to close a larger part of the ocean for a bigger rocket.

SpaceX is actually building its own rocket launch facilities in South Texas. They are also already evaluating sea platforms.

Insurance rates for Falcon 9 are already very low, the lowest in the industry. If Starship can double or triple the flight rate insurance will go down by quite a bit. Also the costumers pay for insurance, its not part of the SpaceX price quoted here. In addition, government don't actually insure things like Artemis program.

> That USAF person in the back of the room with their finger on the destruct button.

That job doesn't exist anymore for SpaceX launches.

In fact, if you look at the total labour for launch, its going down considerably and it will continue to go down. Look at SpaceX operation in South Texas, an explicit goal of their whole design process is to make things cheaper and faster and that goes for operations as well.

Another example is the capsule retrieval operations. During Appollo damn near a whole battle fleet was sent, now its one ship and some available cost guard.

2 million $ per launch is quite extreme however there is absolutely no reason why it should cost over 100 million. Even with the Falcon 9 today, the second stage is actually large part of the cost and a fully reusable system would reduce that consderably. The fuel for Starship is actually cheaper then for the Falcon 9 as the Falcon 9 uses RP-1, helium and a couple other things Starship no longer has.

The steel construction should actually end less expensive then the Falcon 9 construction. This of course doesn't go for the full human capable Starship, but just the Cargo version of the rocket compared.

The Raptor rocket engine is more complex then Merlin and will likely be somewhat more expensive until it significantly overtakes it in production rate. However SpaceX has shown to be able to make engine quite cheaply and with reuse the per flight cost is trivial.

Please explain why Starship should cost (internal cost) more then 2x of Falcon 9.

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