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ULA launches second Vulcan flight, encounters strap-on booster anomaly – Spaceflight Now

October 4, 2024
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ULA launches second Vulcan flight, encounters strap-on booster anomaly – Spaceflight Now
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By thirty-seven seconds after liftoff, it was clear one in all two strap-on stable gas boostersvwas suffered an anomaly as might be seen by sparks and particles falling away from the rocket. Picture: Adam Bernstein/Spaceflight Now

United Launch Alliance fired off a next-generation Vulcan rocket Friday within the second of two “certification” check flights wanted earlier than the brand new launcher can be utilized to hold high-priority nationwide safety payloads for the U.S. Area Power and the Nationwide Reconnaissance Workplace.

One among two solid-propellant strap-on boosters offered by Northrop Grumman suffered an anomaly of some kind throughout the climb out of the decrease ambiance, however the Vulcan managed to proceed on into orbit. What impression the difficulty may need on the Vulcan’s certification shouldn’t be but identified, however ULA CEO Tory Bruno stated will probably be investigated.

“The trajectory was nominal all through,” he stated on the corporate’s launch webcast. “We did, nevertheless have an commentary on SRB No. 1, so we will probably be off taking a look at that after the mission is full.” No different particulars have been offered.

The Vulcan’s two Blue Origin-built BE-4 engines and twin stable rocket boosters, or SRBs thundered to life at 7:25 a.m. EDT, shattering the morning calm with the crackling roar of two million kilos of thrust.

The 202-foot-tall, 1.5-million-pound rocket, decked out in a swirling red-and-white livery, climbed skyward from launch advanced 41 on the Cape Canaveral Area Power Station, quickly accelerating out of the dense decrease ambiance on an easterly trajectory.

The obvious booster anomaly might be seen in long-range monitoring digital camera views when a bathe of sparks and what seemed like particles fell away from the right-side SRB 37 seconds after liftoff. The issue appeared to originate at or close to the nozzle on the base of the booster. The exhaust plume modified form dramatically, however the Vulcan was capable of proceed its climb to area.

The anomaly apart, the strap-on boosters burned out and have been jettisoned about 20 seconds later than deliberate. The methane-burning BE-4s, each producing 550,000 kilos of thrust, continued boosting the rocket out of the decrease ambiance for an additional three minutes or so earlier than shutting down.

The non-reusable stage then fell away to crash into the Atlantic and the flight continued on the facility of the Centaur 5 higher stage’s two Aerojet Rocketdyne RL10C engines.

The higher stage fired its engines a second time after reaching orbit to show its capability to restart in area, a key requirement for army payloads requiring advanced “excessive vitality” trajectories to succeed in their operational orbits.

The Vulcan’s maiden launch on January 8 went off with no hitch, efficiently sending a commercially-built moon lander on its manner. For its second flight, ULA initially deliberate to launch a Sierra Area’s winged cargo ship — Dream Chaser — on its maiden flight, however the spacecraft couldn’t be delivered in time.

As an alternative, ULA put a dummy payload atop the Vulcan, a so-called “mass simulator,” added just a few know-how demonstration experiments to assist allow long-during flights and put in additional instrumentation to document as a lot information as doable throughout the 54-minute demonstration.

The “cert 2” mission “has actually one main goal, which is to go fly a second time and have one other success,” Bruno stated earlier than launch. Assuming a assessment of the flight information confirms good efficiency, he added, “then you definately’re able to fly nationwide safety” payloads.

How the stable gas booster concern may play into that information assessment and the rocket’s eventual certification shouldn’t be but identified.

However two such missions are deliberate later this yr, which Bruno described as “pressing.” Whereas he didn’t point out any doable Area Power or NRO payloads, nationwide safety missions sometimes launch satellites able to optical and radar imaging, digital eavesdropping, encrypted communications relay and different top-secret payloads.

As a result of the Vulcan didn’t carry an energetic payload for its second flight, ULA added “extra instrumentation that we’re ready to make use of for simply characterizing a automobile,” Bruno stated.

“We’re placing all types of different devices (in) simply to assist us higher perceive how the rocket works as we go ahead. In order that’s the mission, a second flight to grow to be licensed, after which some know-how experiments of our personal.”

ULA managers describe the Vulcan as “the way forward for our firm.” It’s changing the Delta 4 household of rockets, which have already been retired, and the venerable Atlas line that dates again to the early days of the U.S. area program.

ULA nonetheless has 15 Atlas 5 rockets in its stock. Eight will probably be used to launch Amazon Kuiper web relay satellites, six are reserved to launch Boeing’s Starliner crew ferry ship to the Worldwide Area Station and one is earmarked to spice up a Viasat communications satellite tv for pc into orbit.

As soon as these missions are flown over the subsequent a number of years, the Vulcan would be the firm’s sole launcher.

“The system that we’ve developed is de facto positioning us for a really vibrant, affluent future for a lot of, a few years to come back,” Mark Peller, ULA’s vp of Vulcan growth, stated earlier than the rocket’s maiden flight. “It has confirmed to already be an especially aggressive product within the market, having an order guide of over 70 missions earlier than first flight.”

Not like the Atlas 5, which makes use of Russian-built RD-180 engines to energy the rocket’s first stage, the all-American powered Vulcan depends on two BE-4 first stage engines constructed by Blue Origin, the area firm owned by Amazon founder Jeff Bezos.

At liftoff, the dual BE-4s generate a mixed 1.1 million kilos of thrust. The 2 strap-on solid-propellant boosters generate one other 919,200 kilos of push, offering a complete thrust of simply over 2 million kilos. The Vulcan might be launched with as much as six strap ons relying on mission necessities.

The hydrogen-fueled Centaur 5 higher stage engines generates 23,825 kilos of thrust, enabling launch of heavy army payloads to so-called high-energy orbits that may’t be simply reached by rockets optimized for low-Earth orbit.

Bruno wouldn’t reveal the price of a Vulcan rocket, aside from to say it was lower than $100 million, making it aggressive with SpaceX’s Falcon 9 and Falcon Heavy rockets.

“Subsequent up after the after this mission will probably be a few missions for the Area Power,” Bruno stated. “We anticipate these to be able to go this yr, therefore the urgency and never with the ability to wait any longer for the Dream Chaser.”



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