This afternoon, Next Spaceflight showed that Tuesday's Starship Flight Test 12
had been pushed back until
Wednesday, May 20, at the same time of 6:30 PM EDT. I haven't seen an explanation of what led to the extra day, so I can't rule
out another slip out later after this one, but that's pretty much always the
case.
It's hard to overstate how important this launch is to SpaceX, and by
extension to the space industry and the US space programs. There are two
fairly big articles about the modifications that brought the Starship from
version 2 to 3 for this mission, and there's a lot riding on it. Again, not
just for SpaceX but for the US space program, and the private space launch
industry in general.
For the details on getting from version 2 to 3, SpaceX themselves have a large
article on their web presence, under their updates,
in this case devoted to just the version 2 to 3 update.
The article that I think gives the better overview is by Eric Berger at Ars
Technica, and titled, "The US space enterprise is desperately waiting for Starship—will it finally
deliver?" This is the one that I think will have more meaning for readers who have
been following the development of Starship since they first started talking
about it and testing ideas. Like the first awkward hops in
August 2019
by the little version of Starship they called Hoppy.
Eric starts from a high level view of how different Starship and SuperHeavy
booster are from pretty much every other rocket you've ever heard of.
Something he doesn't talk about in these few words is how hard what they're
trying to do is. Gravity is tough taskmaster. I've never really played with
the math on these things, or any of the (sort of) games and simulations like
Kerbal Space or others, but one of the things that comes out of studying
spaceflight is that at some size planet, the gravitational pull is strong
enough that it's not possible to get away from the planet. Earth is said to be
close to that size, such that if we were not much bigger than we are, we could
never even get into low Earth orbits. (And I don't want to give a number for
how much bigger because I just don't know enough)
Where this converges onto Starship is that this is the largest rocket humans
have ever created. The performance that can be obtained is a tough
fight.
And yet everything SpaceX aspires to accomplish in the next quarter of a
century, all of its enormous valuation, is predicated on a new launch
vehicle. A rocket that, to date, has a decidedly mixed record of success. A
rocket that has not flown in seven months. A rocket that, finally, may
return to the skies on Wednesday.
We are speaking, of course, of Starship—a truly revolutionary rocket. If it
works. And after a long period of development and three years of test
flights and setbacks, it kind of has to.
A saying that I grew up around so I've had in my head for a good 50 years or
more, is "when you try to do things no one has ever done before, you'll see
things no one has ever seen before." They may be finding problems in the way
SuperHeavy does something that no one in history has ever seen. Could that
fact be a reason why they've had more troubles than they thought? Instead of
scaling up older designs easily, they find the materials don't work right or
other things they didn't consider "just ain't right" because no one has ever
done this before. Remember, Starship and SuperHeavy started out to be carbon
fiber because it's just the way everyone does this. Early in preliminary
design, someone realized that stainless steel had serious advantages and
SpaceX shifted to stainless early in the process.
I've covered this before, but consider the engines that NASA's Space Launch
System (SLS) uses - the couple of SLS flights that have flown both were
powered by Space Shuttle Main Engines that actually flew on Shuttle missions.
The SSMEs happen to have almost the same thrust as the Raptor engines SpaceX
has been developing for Starship. In
May of 2020, I found out that the first stage engines for SLS cost $146 million per
engine, so nearly $600 million ($584 m) for just the four engines of the
booster core. The SSMEs are rated at 512,000 pounds of thrust and both
SpaceX's Raptor 2 and the newer Raptor 3 are in the same class. The Raptor's
design price point is under $1 million.
I took
a picture of Raptor 1 next to Raptor 2
and added a newer (and color) picture of the Raptor 3. The change from 2 to
3 isn't as dramatic as the Raptor 1 to 2, but the simplification is visible.
Yes, those are Raptors 1, 2, 3 from left to right.
The mass of the Raptor sea-level engines has been reduced from 1,630 kg to
1,525 kg - just over 1000 kg, or 2200 lbs. Overall vehicle-level mass
savings reach approximately 1 ton per engine through simplification of the
engine itself, vehicle-side commodities, and supporting hardware. There are
33 of these engines in the SuperHeavy, so that's a savings of 33 tons that
the vehicle was lifting that's now available for payload.
Well, I don't want to quote everything that Berger talks about in his
article, but it's an honest and realistic look at Starship and SuperHeavy.
As he said, Starship has absolutely had a mixed record of success, with
several bad problems in the last couple of years. Who can forget things like
the loss of Starship 8 on the way to the Indian ocean raining Starship
debris over Caribbean islands?
Debris from Starship falls back into the atmosphere in this view over Hog
Cay, Bahamas, in March 2025. Credit: GeneDoctorB via X
I've frequently noted that when it comes to the private launch industry,
it's SpaceX and then everyone else. While Starship hasn't lifted a single
pound to orbit for any entity, SpaceX lifted over 82% of all the mass put
into orbit in 2025. That's pretty much all due to the Falcon 9.
EDIT to Add May 19 @ 10:25 AM EDT: As of this morning, the launch has
slipped to
Thursday May 21 at the same time as before, 6:30 PM EDT.
NASA Spaceflight's weekly video
does a pretty deep dive on this launch and points out that SpaceX is being
pretty careful with this mission because of the high stakes involved. They
point out that with Monday being Memorial Day, SpaceX isn't allowed to close
the beach for a launch on a holiday, so if the launch doesn't go by
Saturday, they're not launching until Tuesday. They've said they are doing
another full Wet Dress Rehearsal before the launch. That doesn't rule out
launching on Thursday, it just adds another thing to bear in mind.