Tower caught the rocket
On October 13, the Super Heavy booster of SpaceX’s Starship returned from space and was caught in mid-air by the mechanical arms of its launch tower, a first in the history of rocketry. The flight was the fifth test of the largest rocket ever built, and the catch was the moment the industry had been waiting for.
On the morning of October 13, the most powerful rocket ever built lifted off from the Texas coast, and seven minutes later its booster came back and was caught, in mid-air, by the mechanical arms of the launch tower. The catch was the first of its kind in the history of spaceflight: a twenty-three-storey first stage, descending at hundreds of kilometres an hour, slowed itself, hovered beside the tower, and was gripped by the pair of steel arms that SpaceX calls the chopsticks, part of the system named, with characteristic drama, Mechazilla. The ship it had carried continued on its way across the Atlantic and splashed down in the Indian Ocean, as planned, and the flight was declared a success within the hour.
The significance of the catch is difficult to overstate for anyone who has followed the economics of spaceflight. The rocket is the most expensive part of the launch, and the history of the industry has been the history of learning to throw less of it away; the boosters of the Falcon family have been landing on droneships and pads for years, but the Starship system is designed for full and rapid reuse, the booster and the ship returning to the pad, refuelled and flown again within days. The catch demonstrates that the largest component of the largest rocket can be brought home, and the demonstration moves the architecture of the Mars programme, which depends on flying the system many times, from the theoretical to the mechanical. ‘This is a day for the engineering history books,’ the company’s commentator said as the arms closed around the booster, and the engineers in the control room, who had spent years building toward the moment, were on their feet.
The flight itself had already earned its place in the programme’s testing arc. The first four flights of Starship had ended in explosions, two of them on the pad and in the air, and each failure had produced the data that the next flight used; the fifth flight carried no satellites, only the proof that the vehicle could fly, separate, return, and land its first stage in one piece. The pace of the tests, five flights in eighteen months, is the pace of a company that treats failure as a cost of learning, and the industry watched the programme’s progress with a mixture of admiration for the engineering and alarm at the disruption it promises.
The catch is a milestone on a road that is still long. The ship itself has not yet been recovered, the refuelling in orbit that the Mars architecture requires has not been demonstrated, and the full system remains years from the flights to the Moon and Mars that SpaceX has promised. But the tower that caught the rocket has changed the terms of the argument: the largest rocket in history has shown that it can be flown like an aircraft, brought home, and flown again. The day belonged to the engineers in Texas, and the industry that watched will spend the next months adjusting to what they proved.