The demonstration flight put the Falcon Heavy into the annals of spaceflight as the world's most powerful rocket in operation, with more lift capacity than any space vehicle to fly since NASA's Saturn 5, which was retired in 1973, or the Soviet-era Energia, which flew its last mission in 1988.
Propelled by 27 rocket engines, the Falcon Heavy packs more than 5 million pounds of thrust at launch, roughly three times the force of the Falcon 9 booster rocket that until now has been the workhorse of the SpaceX fleet. The new heavy-lift rocket is essentially constructed from three Falcon 9s harnessed together side by side.