In the mean time of liftoff, SpaceX’s Starship pushes off the launch pad with roughly 74.4 million newtons of thrust — sufficient power, in precept, to elevate roughly 7,500 tonnes of mass instantly towards gravity.
For context, that’s about twice the thrust of the Saturn V rocket that carried the Apollo astronauts to the Moon between 1969 and 1972. The automobile itself is taller — 121 metres in comparison with Saturn V’s 111 — and heavier when totally fuelled, with a complete mass at liftoff exceeding 5,000 tonnes.
By uncooked bodily output, Starship is essentially the most highly effective rocket ever constructed.
However uncooked thrust is just not actually the purpose of Starship. Saturn V hit comparable bodily scales half a century in the past. What Starship is definitely making an attempt to show — and what its engineering decisions actually replicate — is just not the utmost dimension of a rocket. It’s the most turnaround time between launches. If it really works, that’s the innovation that adjustments what people can do in house.
What really occurs at liftoff
The Tremendous Heavy booster — the large first stage of Starship — is powered by 33 Raptor 2 engines burning liquid methane and liquid oxygen.
Every Raptor 2 produces roughly 2,260 kilonewtons of thrust at sea stage, roughly 230 tonnes-force. Multiplied throughout 33 engines, the overall is about 74.4 million newtons, or 16.7 million pounds-force. That is greater than the present most thrust of NASA’s Area Launch System (about 39,144 kilonewtons) and greater than double that of the Saturn V (about 35,000 kilonewtons).
The rocket burns by propellant at a unprecedented price. Tremendous Heavy incorporates 3,400 tonnes of liquid methane and liquid oxygen. All 33 engines burn constantly for about 166 seconds in the course of the first stage of ascent, consuming roughly 20 tonnes of propellant per second at peak stream.
At that time, the second stage — the Starship spacecraft itself — separates and continues to orbit below its personal six Raptor engines, whereas the Tremendous Heavy booster reverses course and returns to the launch website.
That return is the place the particular engineering revolution really lives.
Why Saturn V comparisons solely get you midway
Saturn V was, by any measure, a unprecedented rocket. It launched 13 instances between 1967 and 1973. Each a type of launches ended with your complete rocket falling into the ocean, breaking up, or burning up. Not a single Saturn V was ever recovered, refurbished, or flown once more.
Each subsequent giant rocket, till roughly 2015, adopted the identical sample. Rockets have been manufactured, flown as soon as, and discarded. A typical expendable launch price a whole bunch of thousands and thousands of {dollars} for a single flight, with basically all of that expense written off the second the rocket left the pad.
SpaceX’s earlier Falcon 9 rocket started altering that sample in 2015 by recovering and reusing its first stage — touchdown propulsively on a barge or touchdown pad and being refurbished for subsequent flights. Falcon 9 first phases have now flown as many as 20 instances every, dropping the efficient price per launch considerably.
Starship pushes the reusability logic additional. Each phases — the Tremendous Heavy booster and the Starship spacecraft — are designed to return to Earth and be reused. And the particular mechanism by which the booster returns is among the strangest engineering decisions in fashionable spaceflight.
The chopstick catch
As an alternative of touchdown on legs, the Tremendous Heavy booster returns to its launch website and is caught in mid-air by two huge mechanical arms mounted on the launch tower. The arms are formally known as “Mechazilla.” Everybody calls them the chopsticks.
The particular purpose for the selection is engineering economic system. Touchdown legs add weight to the booster. Weight subtracts from payload capability. A booster caught by the tower doesn’t want to hold its personal touchdown gear, which implies each kilogram of tower catch mechanism is a kilogram much less that the booster has to elevate on each flight for the remainder of its operational life.
The catch itself is exact. The booster returns from house at hypersonic speeds, decelerates utilizing its personal engines throughout a touchdown burn, and hovers briefly close to the tower earlier than the arms shut round it and grip particular exhausting factors on the automobile’s outer hull. The entire strategy and catch usually takes lower than a minute.
SpaceX first efficiently caught a returning Tremendous Heavy on October 13, 2024, during flight test IFT-5. A second profitable catch adopted on March 6, 2025, throughout IFT-8. A 3rd has since been achieved. The method is just not routine but, however it has been demonstrated to work.
Why “flown once more the following day” is the precise level
The particular purpose all of this issues is just not that catching rockets is cool. It’s that it makes rockets economically akin to airplanes.
An airplane prices some huge cash to construct, however it flies hundreds of instances over its operational life. That’s what makes air journey inexpensive. A rocket, traditionally, prices about the identical as an airplane per unit however flies precisely as soon as. That’s the reason sending something to orbit has all the time been terribly costly.
If Starship could be caught, refurbished, and flown once more inside days relatively than months, the per-flight price drops by orders of magnitude. SpaceX’s stated design target is a full stack turnaround measured in hours to some days, with the identical booster doubtlessly flying a number of instances per week at full operational cadence.
Whether or not SpaceX will really hit that focus on is genuinely unsure. The expertise has not but demonstrated it. As of the latest take a look at flight in Might 2026, particular person boosters haven’t been re-flown from a catch. The corporate continues to work by the particular engineering issues — thermal fatigue, structural stress, {hardware} refurbishment — that separate a caught booster from a re-launched one.
However the framework is now in place. A rocket has been constructed that may produce twice the thrust of Saturn V and be caught again on the launch tower like an outsized chook returning to its perch. Whether or not the identical rocket might be launching once more inside 24 hours is the query the following few years of Starship growth are totally about.
If the reply seems to be sure, the economics of every little thing else in spaceflight will change. Sending people to Mars, refuelling spacecraft in orbit, constructing lunar bases — all of those grow to be doable in ways in which expendable rockets may by no means have supported.
The 74 million newtons of thrust is the particular engineering credential that makes Starship severe. The catch-and-refly system is what makes it revolutionary. What nonetheless stays to be confirmed is whether or not the tower can catch what it catches, and let it go once more, rapidly sufficient to really matter.
