Elon Musk said he hopes to finance his plans to colonize Mars by making SpaceX's entire fleet of vehicles — the Falcon 9, the Falcon Heavy, and the Dragon spacecraft — obsolete. "All our resources will turn toward building BFR," Musk said. "And we believe we can do this with the revenue we receive from launching satellites and servicing the space station." Musk also announced he's planning to scale down the BFR, proposing 31 main engines this year. Last year at the same conference, Musk unveiled the combo rocket-and-spaceship's design, which included 42 main Raptor engines.
Musk also proposed a variety of new uses for the scaled-down rocket beyond just going to Mars. Supposedly, the ITS can be used to launch satellites, take cargo to the International Space Station, and even do lunar missions to set up a Moon base. SpaceX's current Falcon 9 fleet is used to do a few of those things already, but Musk says eventually the company will turn to the ITS to do all of its space missions.
Musk says the cost of launching cargo on the ITS will be fairly cheap, too, since the rocket and spaceship will be a fully reusable system — unlike the Falcon 9, which is only 70 to 80 percent reusable. Last year, Musk claimed the first crews would start flying to the Red Planet as early as 2024. This year, he said the first two cargo ITS ships will launch to Mars in 2022. That's just five years to create an entirely new rocket, send it to another planet, and land it on the surface intact.
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