The company conducted a hold-down firing test of the rocket's 27 Merlin 1D main engines at launch pad 39a that generated approximately 5 million pounds of thrust.
As stated numerous times a year ago, the ability for SpaceX to have two operational launch pads at its Florida launch location greatly aids the company's ability to process multiple rockets in separate flows - as is being seen now with the Falcon Heavy undergoing preparations for its maiden launch from LC-39A while neighboring SLC-40 launches satellites for SpaceX's other customers.
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.
"Falcon Heavy hold-down firing this morning was good", Musk said in the tweet. "Launching in a week or so".
The long-anticipated test flight will carry up a Tesla Roadster belonging to Musk, who heads both the rocket and electric vehicle companies. The company has 30 flights planned over the next 11 months.
Musk stated publicly that the Falcon Heavy's first passenger will be Tesla's cherry red roadster, as well as the reason for not sending any live crew. More impressive that the output of the platform however, is that Musk claims each Falcon Heavy launch will cost less than a third of the price of a Delta IV launch, which is now the most powerful operational platform in use today. That's three times as many engines as are on SpaceX's current workhorse rocket, the Falcon 9.
The company now only operates the Falcon 9 rocket, which consists of a core first stage booster and a second stage.
The Falcon Heavy is the largest rocket SpaceX has ever built.
Launch viewing tickets through Kennedy Space Center Visitor Complex went on sale Thursday and quickly sold out for the closest "Feel the Heat" spots at the Apollo/Saturn V Center.