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CFT Launch Scrubbed, Groups Recycle for “Attainable” Subsequent Try Tomorrow

June 2, 2024
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CFT Launch Scrubbed, Groups Recycle for “Attainable” Subsequent Try Tomorrow
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Shut-up view of Boeing’s CST-100 Starliner spacecraft, atop the Atlas V. Photograph Credit score: Jeff Seibert/AmericaSpace

Crew Flight Take a look at (CFT) Commander Barry “Butch” Wilmore and Pilot Suni Williams should wait somewhat longer for the primary human-carrying voyage of Boeing’s CST-100 Starliner spacecraft to the Worldwide Area Station (ISS), following a scrub lower than 4 minutes earlier than launch on Saturday. Groups have Jap Vary assist for a “doable” subsequent try at 12:03 p.m. EDT on Sunday, after which personnel will stand down earlier than ramping up for one more back-to-back pair of launch tries on Wednesday and Thursday of subsequent week.

The Blue Workforce arrives on the base of SLC-41 within the minutes after the scrubbed launch try. Photograph Credit score: NASA

In the present day’s agonizing launch delay comes nearly a month for the reason that first try and get CFT off the bottom again on 6 Might, when groups elected to face down for what was hoped to be a few week to take care of a defective oxygen aid valve on the Atlas V’s second stage. That valve was promptly changed and examined, with early hopes to fly as quickly as 17 Might, however within the meantime a small helium leak was detected in Starliner’s service module.

Traced to a flange on a single response management system thruster, the difficulty brought about the launch to maneuver once more to No Earlier Than (NET) 21 Might, then no earlier than the twenty fifth and finally to the opening day of June, with a focused T-0 level at 12:25:40 p.m. EDT. Final week, Wilmore and Williams flew from NASA’s Johnson Area Heart (JSC) in Houston, Texas, to the Area Coast and on Thursday the 172-foot-tall (52.4-meter) Atlas V with Starliner perched at its tip was rolled the quarter-mile (400-meter) distance from the 30-story Vertical Integration Facility (VIF) to the SLC-41 pad floor.

The Blue Workforce start work to open Starliner’s hatch after Saturday’s launch scrub. Photograph Credit score: NASA

Climate circumstances for Saturday’s inaugural launch try and Sunday’s backup alternative pledged 90-percent favorability, tempered by a slight threat of violating the Cumulus Cloud Rule and the Floor Winds Rule. “A big space of excessive stress, at the moment centered over the Ohio Valley area, ought to dominate Central Florida’s climate,” famous the forty fifth Climate Squadron at Patrick Area Pressure Base in a Friday replace.

“For the first launch window, that prime is anticipated to be close to the North Carolina coast, bringing breezy, easterly winds and dry, secure air to the Spaceport,” it continued. “Climate is anticipated to be favorable, with winds and the Cumulus Cloud Rule being the first issues.” Sunday was predicted to be broadly related, with a slight lower in wind speeds and a marginal enhance in cloud cowl.

The Atlas V for CFT is configured in its not often used “N22” configuration, with a Twin-Engine Centaur (DEC) higher stage and a pair of Aerojet Rocketdyne-furnished AJ-60 solid-fueled boosters. Photograph Credit score: Jeff Seibert/AmericaSpace

Saturday’s motion bought underway at 1:05:40 a.m. EDT, precisely 11 hours previous to T-0, when the CFT countdown clock began ticking at T-6 hours and 20 minutes and engineers started powering-up the 172-foot-tall (52.4-meter) Atlas V. This explicit incarnation of the automobile—nicknamed “The Bodyguard” in honor of its crew-carrying credentials—is formally designated “N22” and consists of the Atlas V Frequent Core Booster (CCB), a pair of AJ-60 solid-fueled boosters offered by Aerojet Rocketdyne, the Twin-Engine Centaur (DEC) higher stage, the Launch Car Adapter (LVA) and Starliner.

The N22 has been used twice beforehand, for Starliner’s uncrewed Orbital Flight Exams (OFTs) in December 2019 and Might 2022. Notably, the Mighty Atlas beforehand flew people 4 instances—lofting Mission Mercury astronauts John Glenn, Scott Carpenter, Wally Schirra and Gordon Cooper atop Atlas-D boosters for his or her missions between February 1962 and Might 1963—and CFT marks the primary event a member of this decades-old household of rockets has carried individuals in over 61 years.

Spectacular views of December 2019’s launch of an Atlas V with Starliner’s first uncrewed Orbital Flight Take a look at (OFT-1). Photograph Credit score: Mike Killian/AmericaSpace.com

In the present day’s prolonged countdown included a pair of pre-planned, built-in holds. The primary, lasting an hour, started at 5:25 a.m. EDT, at T-2 hours, and enabled a shift-change to happen within the Launch Management Heart (LCC) because the Preps Launch Workforce handed over their console tasks to the Tanking and Launch Workforce, led by ULA Chief Launch Conductor Doug Lebo.

With 25,000 gallons (94,000 liters) of “storable” RP-1 kerosene having been loaded into the Atlas V CCB tanks previous to the 6 Might launch try, efforts moved into excessive gear to gasoline the booster and Centaur with cryogenic liquid oxygen and hydrogen. All advised, the DEC was fueled with 4,150 gallons (18,870 liters) of super-cooled liquid oxygen and 12,300 gallons (46,560 liters) of liquid hydrogen and the CCB was loaded with 48,800 gallons (184,730 liters) of liquid oxygen.

An Atlas V N22 lifts the uncrewed OFT-2 Staliner mission to area in Might 2022. Photograph Credit score: Jeff Seibert/AmericaSpace

With the conclusion of tanking, and with the Atlas V in a “quiescent state”, the countdown entered its second built-in maintain of 4 hours. Throughout this timeframe, Wilmore and Williams have been handed over to the Boeing crew within the Neil Armstrong Operations & Checkout (O&C) Constructing the place they got a climate briefing and shortly after 8 a.m. EDT have been assisted into their personalized “Boeing Blue” launch and entry fits by Boeing engineers and David Clark go well with technicians.

In the meantime, on the pad the ULA/Boeing “Blue Workforce” verified no poisonous vapors within the SLC-41 White Room and set to work opening Starliner’s hatch and readying the inside for Wilmore and Williams. The astronauts departed the O&C Constructing shortly after 9 a.m. EDT and rode Boeing’s Crew Transport Car (CTV) to the pad. As soon as there about 20 minutes later, they took the elevator to Stage 12 on the Crew Entry Tower (CAT) to start boarding the spacecraft by way of the Crew Entry Arm (CAA).

OFT-2 takes flight on 19 Might 2022. Photograph Credit score: Jeff Seibert/AmericaSpace

Wilmore was in place within the left-side commander’s seat shortly earlier than 8:30 a.m. EDT, with Williams—the primary lady ever to fly on the maiden voyage of a brand new, orbital-class spacecraft—assuming her place within the right-side pilot’s seat a couple of minutes later. The pair accomplished go well with pressurization and leak checks and established communications hyperlinks with floor controllers.

“The climate seems to be good,” tweeted ULA CEO Tory Bruno. “Atlas is standing tall, sturdy and proud. The Solar rises above all. Looks like a superb day to go to area.”

Flanked by fellow NASA astronauts Mike Fincke and Jessica Wittner, CFT Commander Barry “Butch” Wilmore addresses well-wishes on the Kennedy Area Heart (KSC) on 25 April. Photograph Credit score: Jeff Seibert/AmericaSpace

Nevertheless, in a worrisome indicator of the last-minute scrub which impacted their first launch try, an issue related to the topping-off of the DEC tanks arose simply after 10 a.m. EDT. “Working a problem with topping valves on the bottom aspect,” tweeted Mr. Bruno, including {that a} needed “repair” to change to redundant circuitry was being run by ULA’s software program integration lab earlier than transferring forward.

The transition to redundant circuitry allowed DEC topping to renew and shortly after 11 a.m. EDT the Blue Workforce closed and sealed Starliner’s hatch and commenced the method of retracting the entry boarding, deflating the environmental seal and retreating to their fallback positions. “A verify of the native climate reveals no guidelines are being violated,” famous ULA. “Situations are inexperienced throughout the board.”

CFT Pilot Suni Williams can be making her third spaceflight. Photograph Credit score: Jeff Seibert/AmericaSpace

With solely a single second in time—exactly 12:25:40 p.m. EDT—to launch, Wilmore and Williams closed their visors shortly after midday and LCC groups have been instructed to keep up radio silence because the countdown moved by its last minutes. The CAA was hydraulically retracted to its stowed place and Starliner itself was positioned on inside energy. From his console, Mr. Lebo proceeded well by a Go/No-Go polls of all personnel, ending with the crew.

“Starliner is go,” got here the clipped reply from Wilmore.

Starliner is considered one of two Business Crew automobiles being ready for normal Worldwide Area Station (ISS) crew rotations. Photograph Credit score: NASA

The retired U.S. Navy captain, who beforehand flew as a shuttle pilot and ISS commander, then added: “This can be a nice day to be happy with your nation. We’re able to put some hearth into this rocket!”

Sadly, Wilmore’s earnest phrases proved untimely, for an ominous “Maintain! Maintain! Maintain” name got here from the Floor Launch Sequencer (GLS) at T-3 minutes and 50 seconds. Clocks have been recycled to T-4 minutes and groups entered a scrub timeline, preparatory to extraction of the astronauts from Starliner’s cabin.

Commander Barry “Butch” Wilmore and Pilot Suni Williams are pictured throughout pre-mission coaching. Photograph Credit score: NASA/Robert Markowitz

Within the minutes after the scrub, ULA Launch Director Tom Heter III instructed groups to organize for a “doable” subsequent launch try at 12:03 p.m. EDT Sunday. Following liftoff, Wilmore and Williams will spend about 25 hours in transit to the ISS, the place they may spend not less than eight “docked” days conducting a spread of flight take a look at aims alongside the area station’s incumbent Expedition 71 crew—Commander Oleg Kononenko, fellow Russian cosmonauts Nikolai Chub and Aleksandr Grebenkin and NASA astronauts Matt Dominick, Mike Barratt, Jeanette Epps and Tracy Dyson—earlier than returning to a parachute-and-airbag-aided touchdown within the southwestern United States.

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