The Falcon Heavy rocket nuclear amplifier launched Thursday from NASA's Kennedy Space Center in Florida tipped into rough sea after landing on an offshore dragon ship, SpaceX officials said on Monday.
Falcon Heavy's core booster moved about 10 minutes after Falcon Heavy blew out of Florida's space shore and moments after the rocket's two side priests returned to landing on the road at Cape Canaveral Air Force Station.
The landings on the target marked the first time SpaceX landed all three Falcon Heavy boosters on the same mission. The core stage crashed at sea near the drone ship after losing the ignition fluid on Falcon Heavy's initial flight in February 2018.
But the sea swells to rock the drone ship, which SpaceX has called "Of course I Still Love You" caused the rocket to top before recovery crew could safe booster to the ship.
"During the weekend due to rough sea conditions, SpaceX's recovery team was unable to secure the core of its turn to Port Canaveral," said James Gleeson, a SpaceX spokesman. "As conditions deteriorated with eight to ten foot swells, booster began to move and ultimately could not stay upright.
" While we had hoped to bring booster back intact, security work in our law always took precedence, "Gleeson said in a statement. "We do not expect future missions to be affected."
The launch was successful in its primary goal and delivered the Arabsat 6A communication to pave the way for launching a mission radio video, radio, and Internet signal across the Middle East, North Africa, and Europe.
The Falcon Heavy sidestampers and the two halves of the rocket payload layer were recovered intact and will be reused on future missions, SpaceX said.  The SpaceX system normally uses to secure the booster to the drone ship could not be used on the Falcon Heavy Mission because nuclear booster uses a other mechanical interface, but SpaceX intends to use it then the system at the next landing attempt.
Raised by more than 5.1 million pounds of traction, Falcon Heavy fell to the east from the Kennedy Space Center with 27 Merlin main engines – nine on each rocket's first three stage boosters.
Falcon Heavy's core booster shot for three and a half minutes on Thursday's launch and accelerates to a speed of more than 6,700 km / h before releasing and allowing the rocket's upper stage to complete the task of placing the Arabsat 6A communications satellite in orbit.
The two-sided boosters pulled one minute earlier – at about T + plus 2 minutes, 30 seconds – to begin their journeys back to Cape Canaveral. The core phase flew at a lower throttle to save fuel, then ramped up to full power after separating the side clamps.
SpaceX's drone ship was parked about 615 miles (990 kilometers) east of Cape Canaveral for Thursday's mission, farther down than the ship's typical SpaceX launch position due to the Falcon Heavy high-speed station.
The sidestampers who landed after Thursday's launch will be inspected and renovated for the next Falcon Heavy aircraft scheduled for late June, which was already planned to use a new core booster. The two-part payload will be reused on a Falcon 9 launch later this year with a set of SpaceX's StarLinks broadband internet satellites in orbit.
With the Falcon Heavy's core stage lost after landing, the successful rocket boosts SpaceX was now counting on 37 vehicles – 23 on drone ships, 13 at Cape Canaveral Air Force Station and one at Vandenberg Air Force Base, California.
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