https://techcrunch.com/2018/02/06/watch-spacex-launch-its-falcon-heavy-rocket-for-the-first-time-here/

SpaceX is test launching its Falcon Heavy rocket, the first ever launch of the new heavy-lift orbital rocket. The Heavy’s thrust is generated by its 27 Merlin engines, which is three times the number of engines you’d find in the current Falcon 9 rocket.

That amounts to over 5 million pounds of thrust, and a total cargo capacity of around 119,000 pounds. That gives it more than double the total freight moving power of its next closest competitor. In fact, the last active rocket with a greater payload capacity was NASA’s Saturn V rocket, which flew its last mission in 1973.