The 5.1 million pounds of thrust that will eventually propel Falcon Heavy off the pad will make it the most powerful rocket in the world, expanding SpaceX's manifest to heavier, more complicated payloads.
Falcon Heavy will generate over five million pounds of thrust at lift-off via three Falcon 9 nine-engine cores containing 27 Merlin engines that are configured with eight engines surrounding one centre engine on each core.
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The sheer power of Falcon Heavy is eminently clear in this lovely capture by Tom Cross.
Over the week and a half between now and the tentative present launch date, SpaceX can be expected to further pore over the vehicle and pad systems to ensure that they are in proper working order after some months of inactivity, punctuated by a controlled explosion. It was initially announced in 2011, and it remained for years a goal in SpaceX's horizon, since there have been several frustrating attempts on test runs in 2015 and 2016, given the fact that the Heavy Falcon is already assembled and ready for takeoff, it is safe to say that failed attempts pushed SpaceX to this point.
As with all static fires of flight-proven boosters, the static fire was anticipated to last 7 seconds from the time of engine ignition to engine shutdown. The Falcon Heavy has a capacity of 140,660 pounds into lower earth orbit.
The Falcon Heavy is the largest rocket SpaceX has ever built.
The Falcon Heavy can carry the biggest payload since the Apollo lunar programme's Saturn V - and is viewed as an essential step in Musk's plan to establish a human colony on Mars.