Find all the latest articles and watch Indonesian-related TV shows, reports and podcasts onNASA's first integrated spacecraft and Space Launch System (SLS) rocket for NASA's Artemis 1 lunar test flight returns to Launch Pad 39B at Kennedy Space Center (KSC) in Florida in hopes of completing the final major test before its planned maiden launch later this year.Repairs and maintenance were carried out in May, both at the Vehicle Assembly Building (VAB) at KSC and outside the Aerospace Center at Air Liquide's nitrogen plant.Attempts in April to complete demonstration tests of Wet Wear Proofs (WDR) were delayed due to multiple outages of nitrogen gas from an offsite plant and were later removed due to problems with the portable actuator two-stage liquid fuel SLS refueling connection.Exploration Ground Systems (EGS) and lead launch processing contractor, Jacobs, are preparing the flight and ground systems for their next WDR effort about two weeks after the vehicle arrives on the Pad 39B.Return to the board after solving the problemVAB's first Crawler Transporter-2 movement carrying Mobile Launcher-1 with Artemis 1 The car is scheduled to depart shortly after midnight ET on June 6, the start of the journey to Pad 39B.The approximately four-mile walk from High Bay 3 to the raised bearing surface is expected to be completed in 8-12 hours, when the Mobile Launcher is lowered into a "hard fall" position on a pedestal.The first lunar-capable Orion/SLS aircraft returned to the platform six weeks after departing to tackle the problem. The problem came to light during three attempts to exercise in wet clothes in April.Problems were found with the runway and runway systems and the nitrogen gas supply (GN2) system at the Air Liquide plant.Without the ability to safely carry out propellant loading and unloading operations until the GN2 plant maintenance and upgrade work was completed and verified, the vehicle was returned to VAB at the end of 25 April to troubleshoot and resolve these issues in parallel.You will now be traveling back and forth across the board to complete your WDR Countdown Demo test.During the pad campaign in April, the check valve in the ICPS gas helium system started to fail After performing maintenance on the relevant pad system following the 2nd WDR attempt on April 4.NASA decided to partially fix the stuck valve and perform a WDR test that largely ruled out the SLS stage two of the fuel and tip countdown, but that April 14 attempt was cleared when a hydrogen leak from the booster line was detected in the primary.navel stage.(Photo Caption: Artemis 1 vehicle seen at VAB High Bay 3 on June 2. During a month-long layover at VAB, EGS and Jacobs workers disconnected external cables from the outside of the vehicle used to record vibrations or minor movements of the vehicle as it rolls over and returns to its previous post , one of several "Move Forward" missions completed in parallel with fixes and modifications of issues discovered during a wet-clothes testing attempt in April.)As it turns out, work on another classified matter has prompted the launch of the two boards from their original projections in late May to early June.During the limited thrust created with the ICPS, outside air is detected within the enclosed area at one of the navel connections of the portable actuator to the upper level.“We modified the ICPS covert boot, which is the area covered by the rapid disconnection of the umbilical cord between the umbilical arm and the vehicle, and added an additional leak detector on the liquid hydrogen side to gain visibility of potential leaks that might occur.," said Cliff Lanham, senior director of vehicle operations for the Vehicle Operations Program.NASA EGS, during a teleconference on May 27, “During Reservoir Operations.”“We saw a small amount of air being sucked in [hazardous gas detection system] Dr John Blevins, NASA's chief engineer for the SLS program, explained during a conference call.“We clean it [area] with warm helium with this [quick disconnects] About this boot to prevent icing and other situations."“Every pollutant, even air, shows up in our hazardous gas system as potential hydrogen, and we have a four percent [concentration] limit on that.We added some measurements [that] We will take [the launch team] can use [to] We differentiate between this air and hydrogen so we don't mistakenly close the system tank due to [a] false alarm."The trunk, as we call it, is a cover that slides so that it touches a flat surface on the car.Blevins later explained in an email.“It does not offer [a] tight seal since we introduced it [purge] gas in the trunk, and this positive pressure is generally sufficient to prevent air being sucked into the trunk.”“[During] The last wet gown, while we cooled the tub, we might have taken a breath of fresh air.The shoe has been adjusted to ensure surface-to-surface contact with the engine surface seat of the vehicle, and the strap buckle is positioned precisely to prevent swallowing.SLS on the LC-39B to try it out with the original 850,000 gallon liquid hydrogen storage ball for left bearing.(credit: Nathan Parker for NSF)“And since there are lingering concerns, and it's hard to get to this place on the pillow, we put in an additional sampling tube to separate whether air is being drawn in to make sure we don't sound the alarm about contaminants unless it really is a hydrogen leak, which should relieve cleaning process on boot,” he added in an email.“No modifications to the boot, just a tube to provide additional samples.”Earlier in May, the integrated operations team of EGS and Jacobs Intake ICPS helium check valve and secret hydrogen leaks in the main stage of the Problem."The valves are fine," Blevins said.“We swallowed small debris that kept the check valve open, which is why it didn't pass the backflow check.[at the pad in April]."The fast-breaking rubber seal was the source of the debris, and Blevins said engineers were continuing to investigate the root cause.“We have a fault tree;we're working on that fault tree.There's a lot of obscure stuff out there," he said.“Everything is under mitigation, if you will, or they will be under mitigation.We want to look very seriously at that and not jump to conclusions about it with a helium filling system.”“I feel very confident in the system we have right now because we did X-rays;we scanned [verify] that it was in the design configuration and it was,” added Blevins.The bolts on the main stage liquid hydrogen tail service post flange have also been re-tightened after being discovered during a post-recoil inspection, so they are not completely isolated, but Hydrogen leaks are known to be difficult to detect at ambient temperatures, so this fix will eventually be tested during the next tank attempt.The rear service mast that will feed the main stage is LH2 and liquid oxygen.As seen here, the LH2 stud can be seen with the e LOX stud completely hidden behind it.The two commodity TSMs are connected to the same side of the base country.(credit: Nathan Parker for NSF L2)Meanwhile, KSC and Air Liquide conducted a comprehensive, long-term GN2 supply test on the Pad 39B to verify factory repairs and upgrades in mid to late May."They take liquid nitrogen, and there are a few different ways to gasify that commodity," said Tom Whitmaier, NASA's deputy associate administrator for the development of the Joint Exploration System.“Can you [use] Steam Generator.It looks like a small drip coil;You heat this liquid and turn it into a gas.The second thing you can do is you can use an air exchanger.And the air exchanger is exactly what it sounds like, a huge cooling tower that sits outside the hot liquid nitrogen and turns it into a gas.”"They added this air exchanger in addition to the steam generator we had before, and it's really a kind of belt and strap," adds Whitmer."This added capacity for the air exchanger and the ability to switch back and forth really adds some great capacity and we're delighted to have it.""We asked for a long-term test, and the provider provided it," Blevins added.“Every part of this [during the test] profile exceeds what we will ever do in terms of duration and volume of nitrogen demand with simulated resistance in the pad or damper."“This is a very important commodity, which of course is the reason for our decline.I'm sure, but also be careful because I need this commodity.[We] I've been working hard to clean the device if we can't provide disinfection, so I'm ready to do that test.”Credit: Nathan Parker for NSF (left), NASA (right).(Photo Caption: The Artemis 1 spacecraft on the podium in April. In the photo right, a Jacobs technician in an Atmospheric Protection (SCAPE) suit stands on the roof of Pad 39B during an SLS Booster hydrazine entitlement activity. Left to right: Molly Smith, and Mark K. Smith, Ryan McHenry, and David Goetz.)During the WDR effort on April 14, the second GN2 supply collapse was more serious as the SLS core phase was still partially filled with liquid hydrogen and liquid oxygen.As the propellant is still moving through the path between the vehicle and the launcher and launch pad, a backup source of nitrogen gas provided by the charger at KSC's Converter Compressor Facility (CCF) is used to allow propellant release to continue.Final big test before launch plannedWith fixes and upgrades in place, it will take approximately two weeks for the launch team on the Pad 39B and at the launch control center adjacent to the VAB to prepare the Orion, SLS, Mobile Launcher and boards for “launch day” the next day of trying out wetwear training. , currently expected on June 19 [of schedule margin] Lanham said on May 27."This is Florida in June, so thunderstorms are expected, and we'll also be working on any range limits that may arise."Cape Canaveral Space Force Station (CCSFS) and the Eastern Test Range are busy with frequent SpaceX launches and other commercial launches, and WDR is a dangerous operation that must be coordinated with launches at KSC and CCSFS.With the ICPS helium system returned to full functionality, the next wetsuit preparation effort is planned to be a full test, almost identical to a last-minute firing countdown.The WDR is planned as a complete countdown test of the Orion, SLS, and ground systems to demonstrate that the hardware and software are ready to launch the SLS engine and booster to finally launch the Artemis 1.During the two weeks from start-up to loading of the SLS two-stage propellant, the team will link the vehicle and mobile launch systems to the Pad 39B's power, data, fluids and fuel transmission lines.As was the case in late March prior to the first WDR attempt, the launch team will once again run Orion and SLS and verify that these connections are working.After the bearing check, the last major operation before the countdown begins is to repair the power unit for the hydraulic system on the solid rocket booster.The Shuttle Heritage Booster's hydraulic power units will be loaded with their own hydrazine fuel, and then the launch team will be in a position to start the two-day countdown, which is currently expected to occur in the afternoon of June 17th.Main image credit: NASA/Glenn Benson.“Beer fan.A devoted pop culture scholar.Coffee Ninja.Evil zombie fan.Organizer."Your email address will not be published.Required fields are marked *Save my name, email and website in this browser for my next comments.