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ULA Vulcan launch marks debut NSSL mission for House Pressure

August 14, 2025
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ULA Vulcan launch marks debut NSSL mission for House Pressure
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ULA’s Vulcan Centaur—a two-stage, heavy-lift orbital launch car—lifts off on its debut nationwide safety mission for the U.S. House Pressure. Credit score: United Launch Alliance

  • The United Launch Alliance’s (ULA) Vulcan Centaur rocket efficiently accomplished its inaugural nationwide safety mission (USSF-106), launching the Navigation Expertise Satellite tv for pc-3 into geosynchronous Earth orbit (GEO).
  • This mission marks the debut of Vulcan Centaur throughout the Nationwide Safety House Launch (NSSL) program, changing the retired Delta IV Heavy rocket and ending U.S. reliance on Russian-made rocket engines.
  • Vulcan Centaur, a two-stage, heavy-lift launch car, deployed a payload of roughly 14,300 kilos to GEO, showcasing its capability and capabilities.
  • ULA secured 26 missions below NSSL’s Section 2 contract, and additional contracts below Section 3, indicating its continued position in this system alongside SpaceX and different launch suppliers.

After years of certification snags, the U.S. House Pressure lastly has its newest Nationwide Safety House Launch (NSSL) rocket.

The latest department of the U.S. armed forces on Tuesday launched United Launch Alliance’s (ULA) Vulcan Centaur to geosynchronous Earth orbit (GEO), marking the two-stage, heavy-lift launch car’s debut nationwide safety mission. The NSSL program is chargeable for sending a few of the nation’s most delicate and superior area know-how to orbit.

Vulcan took the reins from ULA’s Delta IV Heavy, some of the prolific rockets in U.S. historical past on the time of its final flight in April 2024. Final yr, it accomplished a pair of certification flights — together with the launch of Astrobotic’s Peregrine lunar lander — that paved the way in which for Tuesday’s mission, dubbed USSF-106.

Vulcan lifted off from House Launch Advanced-41 at Cape Canaveral House Pressure Station in Florida simply earlier than 9 p.m. EDT. The variant that flew stood simply over 200 toes tall, producing 3 million kilos of thrust from 4 Northrop Grumman stable rocket boosters in addition to a pair of Blue Origin BE-4 fundamental engines.

Following fundamental engine cutoff, the rocket’s Centaur V second stage ignited its RL10C engines, constructed by Aerojet Rocketdyne and loaded with cryogenic liquid hydrogen and oxygen. Based on ULA, Centaur V produces greater than twice the vitality and is orders of magnitude extra sturdy than its predecessors.

The second stage then headed to GEO, the place it deployed an Air Pressure Vanguard payload referred to as the Navigation Expertise Satellite tv for pc-3—the nation’s first built-in navigation satellite tv for pc experiment in half a century. Centaur can carry as much as 14,300 kilos of payload to GEO.

“After years of improvement, technical collaboration, and dedication by all concerned, together with our authorities mission companions and the whole ULA group, I’m proud to say the primary Vulcan NSSL mission delivered its payloads safely into area,” mentioned Colonel Jim Horne, mission director for USSF-106.

‘Nationwide safety begins at liftoff’

Vulcan is taking part in a key position within the House Pressure’s shift away from foreign-built {hardware} and techniques.

NSSL started awarding contracts for a brand new technology of business launch autos in 2018, allocating funding and missions to ULA, SpaceX, Blue Origin, Northrop Grumman, and a handful of others. Thus far, all missions have been flown by SpaceX’s Falcon 9 and Falcon Heavy and ULA’s Delta IV and Atlas V.

“Nationwide safety begins at liftoff,” mentioned Gary Wentz, ULA vice chairman of presidency and industrial packages, in an announcement. “Vulcan did precisely what it was constructed to do: ship a vital mission with energy, precision and confidence.”

SpaceX decried the collection of Atlas V, arguing that its use of Russian-made engines violated sanctions. The induction of Vulcan, although, “ends U.S. reliance on Russian engines,” per the House Pressure.

“Vulcan offers flexibility to our nation’s choice makers as we fight our adversaries’ makes an attempt to disrupt the U.S. in area operations,” mentioned Tory Bruno, ULA CEO and president.

The heavy-lift rocket has a chance to construct on the legacy of Delta IV Heavy, which on the time of its retirement was the third-highest capability launch car in operation. Together with Falcon 9, it served because the spine of the NSSL program. However the competitors is heating up.

USSL-106 was the primary of 26 missions allotted to ULA below the NSSL’s Section 2 contract award. SpaceX obtained 22 Section 2 missions.

Each firms have been once more chosen for Section 3 contracts, receiving about $5 billion every and 28 and 19 launches, respectively. Blue Origin’s New Glenn was additionally a part of that award. However Section 3 is split into two “lanes.” ULA, SpaceX, and Blue Origin obtained extra rigorous Lane 2 missions, whereas Rocket Lab and Stoke House will tackle extra lenient Lane 1 flights.

The NSSL program is extra crowded than it was once, which locations extra strain on ULA to carry out. Nevertheless, Tuesday’s success could also be step one towards cementing Vulcan because the House Pressure’s new workhorse.

Editor’s notice: This story first appeared on FLYING.



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