The Silicon Graybeard (among others) links to a really interesting video from SpaceX about Starship:
Something that needs to be shared is a video from SpaceX, called Starship - Test Like You Fly and while it's nearly a half hour long, it's absolutely worth watching.
That's near-term Starship past and (implied) future. But watching it made me think about a 2021 post from Casey Handmer - Starship Is Still Not Understood. In it, he remarks on just how far Starship had come in the previous couple of years:
While I am 100% certain that the Starship design will continue to evolve in noticeable ways, the progress in two years cannot be understated. Two years ago Starship was a design concept and a mock up. Today it’s a 95% complete prototype that will soon fly to space and may even make it back in one piece.
The odds of Starship actually working in the near future are much higher today than they were two years ago. Across the industry, decisions are being made on a time horizon in which Starship operation is relevant, and yet it is not being correctly accounted for.
He then goes on to lay it all out:
Starship matters. It’s not just a really big rocket, like any other rocket on steroids. It’s a continuing and dedicated attempt to achieve the “Holy Grail” of rocketry, a fully and rapidly reusable orbital class rocket that can be mass manufactured. It is intended to enable a conveyor belt logistical capacity to Low Earth Orbit (LEO) comparable to the Berlin Airlift. That is, Starship is a powerful logistical system that puts launch below the API.
Starship is designed to be able to launch bulk cargo into LEO in >100 T chunks for <$10m per launch, and up to thousands of launches per year. By refilling in LEO, a fully loaded deep space Starship can transport >100 T of bulk cargo anywhere in the solar system, including the surface of the Moon or Mars, for <$100m per Starship. Starship is intended to be able to transport a million tonnes of cargo to the surface of Mars in just ten launch windows, in addition to serving other incidental destinations, such as maintaining the Starlink constellation or building a big base at the Lunar south pole.
The fact that Starship flown expendably would be perhaps 10 times cheaper, in terms of dollars per tonne, than even Falcon is not relevant.
Jerry Pournelle used to say that the only space metric that counted was cost per ton delivered to orbit. I don't see this as a Berlin Airlift; it's a Liberty Ship. Mass Produced in huge numbers and able to shuttle large amounts of generic cargo to and from space. Handmer emphasizes this point:
Historically, mission/system design has been grievously afflicted by absurdly harsh mass constraints, since launch costs to LEO are as high as $10,000/kg and single launches cost hundreds of millions. This in turn affects schedule, cost structure, volume, material choices, labor, power, thermal, guidance/navigation/control, and every other aspect of the mission. Entire design languages and heuristics are reinforced, at the generational level, in service of avoiding negative consequences of excess mass. As a result, spacecraft built before Starship are a bit like steel weapons made before the industrial revolution. Enormously expensive as a result of embodying a lot of meticulous labor, but ultimately severely limited compared to post-industrial possibilities.
Starship obliterates the mass constraint and every last vestige of cultural baggage that constraint has gouged into the minds of spacecraft designers. There are still constraints, as always, but their design consequences are, at present, completely unexplored. We need a team of economists to rederive the relative elasticities of various design choices and boil them down to a new set of design heuristics for space system production oriented towards maximizing volume of production. Or, more generally, maximizing some robust utility function assuming saturation of Starship launch capacity. A dollar spent on mass optimization no longer buys a dollar saved on launch cost. It buys nothing.
The implications are huge, and probably require a change in the institutions themselves (e.g. JPL and NASA):
NASA centers and their contractors build exquisitely complex and expensive robots to launch on conventional rockets and explore the universe. To take JPL as an example, divide the total budget by the mass of spacecraft shipped to the cape and it works out to about $1,000,000/kg. I’m not certain how much mass NASA launches to space per year but, even including ISS, it cannot be much more than about 50 T. This works out to between $100,000/kg for LEO bulk cargo and >$1,000,000/kg for deep space exploration.
Enter Starship. Annual capacity to LEO climbs from its current average of 500 T for the whole of our civilization to perhaps 500 T per week. Eventually, it could exceed 1,000,000 T/year. At the same time, launch costs drop as low as $50/kg, roughly 100x lower than the present. For the same budget in launch, supply will have increased by roughly 100x. How can the space industry saturate this increased launch supply?
...
This is where the risk to the space industry originates. Prior to Starship, heavy machinery for building a Moon base could only come from NASA, because only NASA has the expertise to build a rocket propelled titanium Moon tractor for a billion dollars per unit. After Starship, Caterpillar or Deere or Kamaz can space qualify their existing commodity products with very minimal changes and operate them in space. In all seriousness, some huge Caterpillar mining truck is already extremely rugged and mechanically reliable. McMaster-Carr already stocks thousands of parts that will work in mines, on oil rigs, and any number of other horrendously corrosive, warranty voiding environments compared to which the vacuum of space is delightfully benign. A space-adapted tractor needs better paint, a vacuum compatible hydraulic power source, vacuum-rated bearings, lubricants, wire insulation, and a redundant remote control sensor kit.
I suspect that Jared Isaacson understands this. The Space industry five years from now will be very, very different that any projections we can make today. Starship's future - while brightly described in SpaceX's outstanding video - is much more interesting than almost anyone suspects.
