The Asian Age

Party balloon to bring rockets back

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Washington, April 16: SpaceX is getting into the party spirit. CEO Elon Musk revealed on Monday that the space- faring firm plans to try and employ “a giant party balloon” to bring its rockets’ upper stages back from orbital velocity. If all goes to plan, the company would then land the component on “a bouncy house.”

It sounds like another outlandish idea from the same mind that sent his own car into space, but Musk has good reasoning behind his plan. A balloon is ideal because it keeps its shape across all ranges of Mach number ( known as “regimes”) and helps reduce the ballistic coefficien­t by two orders of magnitude. Musk explained that SpaceX already carries out targeted retro burns for the upper stages to an empty area of the Pacific Ocean. The new plan would involve retargetin­g closer to the shore and positionin­g a catcher ship in a similar manner to Mr Steven.

The ship uses what Musk has described as “basically a giant catcher’s mitt welded on,” consisting of four metal arms and a net. The system was first used in February 2018 to recover the rocket’s fairing, which is used to cover the payload. The fairing has onboard thrusters to guide it to the ship as it falls at eight times the speed of sound, but unfortunat­ely Mr. Steven missed its first fairing.

SpaceX’s mission to recycle as much of its rockets as possible continues. The reward is greatly reduced operating costs: while a rocket costs $ 62 million to build and run, the fuel only costs around $ 3,00,000. The company saves around $ 46.5 billion from reusing the first stage booster. All this adds up to more money for the Mars mission, set to send a manned mission to the red planet by 2024, and proves how the “BFR” could refuel and return to Earth. — Agencies

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