SpaceX plans to test its Falcon Heavy rocket on the Space Coast Monday, company officials said.
The time window for the static-fire test starts at 4 p.m.
Crews have already loaded fuel onto the rocket, which stands on launch pad 39-A, at Kennedy Space Center. The Falcon Heavy will be the most powerful rocket to launch from there since the 1970s.
SpaceX hopes to launch the rocket by the end of January. The company unveiled the Falcon Heavy rocket in December.
Photos posted by SpaceX chief executive Elon Musk then showed the new rocket inside its Florida hangar. Musk has said the Falcon Heavy will launch his own cherry-red Tesla Roadster into space.
SpaceX will test-fire the rocket's 27 engines at the pad Monday.
Falcon Heavy is essentially the company's Falcon 9 times three. It features three Falcon 9 first-stage boosters joined together with a second-stage on the middle one. It also has three times as many engines.
The Falcon 9 is now used to hoist satellites and supplies to the International Space Station. The Heavy is intended for super-big satellites, as well as cargo destined for points far beyond, like Mars.
Musk has repeatedly warned there's a good chance the new rocket could blow up, thus, his own personal property will be aboard. He heads the Tesla electric car company, as well as SpaceX and several other companies.
More photos of Falcon Heavy on the launch pad → https://t.co/095WHX44BX pic.twitter.com/Z5aE1BUFSt— SpaceX (@SpaceX) January 3, 2018
If all goes as planned, Musk's Roadster will wind up in a long, elliptical orbit around the sun, stretching as far out as the orbit of Mars. He laid out the jaw-dropping plan in a series of tweets earlier this month. Last week, a SpaceX manager said the company will meet all necessary government requirements.
"I love the thought of a car drifting apparently endlessly through space and perhaps being discovered by an alien race millions of years in the future," Musk wrote.
The Falcon Heavy will be without its featured load for the test. That's been customary ever since a Falcon 9 exploded during a 2016 practice engine firing, destroying both rocket and satellite.
The Falcon Heavy will have double the thrust of the next biggest rocket out there today, according to Musk. "Guaranteed to be exciting, one way or another," he promised.
SpaceX advertises that the Falcon Heavy will be able to lift 140,660 pounds of cargo to low-Earth orbit, 37,040 pounds to Mars, and 7,720 pounds to Pluto.
NASA's Saturn V moon rocket, used during the late 1960s and early 1970s, will still top the charts. But none of it was reusable. NASA introduced reusability with its space shuttles in 1981, reflying the orbiters as well as booster segments and main engines until their retirement in 2011.
SpaceX has paved the way for rocket reusability in commercial orbital flight. Two of the Heavy's three first-stage boosters have flown before. After blasting off from NASA's historic Launch Complex 39A at Kennedy Space Center, all three will attempt vertical landings, two on land and one on a floating offshore platform.
SpaceX is working on an even bigger rocket that would replace the Falcon line.
NASA is also working on a megarocket, the Space Launch System or SLS. So is United Launch Alliance, a venture between Lockheed Martin and Boeing, with its next-generation Vulcan.
The Associated Press contributed to this report.
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