New Discussion Thread for SLS.SLS Articles (lots of them):https://www.nasaspaceflight.com/?s=SLSL2 SLS (Vast):https://forum.nasaspaceflight.com/index.php?board=48.0--Do not argue. Make sure your posts are on topic and interesting. Don't bandwagon. There's a lot of SLS news out there (well mainly just via our articles as there's very little else out there on the technical side).Attempt to derail this with "But Falcon Heavy" etc.....and your post will be removed. Plenty of "vs" threads. This one is about discussing SLS.Other available thread include:Discussion/Comparison of the new generation of American heavy lift launchersDiscussion on Alternative Launchers to SLS for Artemis
Thanks Gongora. Just wanted to say congratulations once again to the SLS Green Run team, for a successful full-duration launch simulation test. There is a new 4-view B-roll video of the firing posted in the NSF twitter feed. It presents clear views of the 3 gimballing tests, as well as the supplemental cork insulation and adhesive burning from the static heat load. The second gimbal test was especially interesting as they induced different resonance frequencies in the core stage.Also there is a new NSF article from Philip about the 13 cubesat secondary payloads for Artemis 1, and the stacking and launch preparation schedule. I appreciate NSF covering the technical details of SLS and providing progress reports.Artemis 1 launch now early 2022, most probably. Late 2021 still possible but not likely
Yes, for many people watching it might have seemed that something was terribly wrong. I suspect the flames were mostly from the first layer of adhesive as it was exposed. Cork was a good choice as it insulates against both sound and heat energy, is waterproof, and doesn't burn with an open flame. It chars and ablates away.https://www.corkor.com/blogs/corkor/why-use-cork
Last week, teams with EGS conducted prototype testing of a new rainbird system that will be used for future missions under @NASAArtemis. The system, large water nozzles installed on the mobile launcher, will help protect the infrastructure around @NASA_SLS when it lifts off. 🚀
Very well may be, as this is for ML-2. NASA said they would need to address the 1% overpressure waiver for future missions. This would appear to be adding one or more rainbirds in new positions for ML-2.
Quote from: Avatar2Go on 03/29/2021 07:34 pmVery well may be, as this is for ML-2. NASA said they would need to address the 1% overpressure waiver for future missions. This would appear to be adding one or more rainbirds in new positions for ML-2.The selected replacement design will be installed on ML-1 after Artemis I before Artemis II. The new design will also be used on ML-2.
Interesting that they used vinyl water bags beneath the engines and SRBs to absorb the initial shock waves, in addition to the water deluge system and rainbirds. Bags may not be needed on SLS since Orion is much farther from the nozzles.
It's my understanding that the primary issue was the Shuttle's lateral movement causing the sound to reflect off the bare MLP deck and back onto the spacecraft, which isn't a vulnerability shared with SLS. Don't quote me on that, though.
The Space Launch System had the second-highest cost increase in terms of overall dollars, at $363 million, of which $8 million was in fiscal year 2020 and $355 million in fiscal years 2021 through 2023. A three-month delay in the first SLS mission, Artemis 1, along with “rephrasing production” each accounted for about one-third of the costs. The rest came from “surge costs” to compress schedules as well as the costs of facility shutdowns.
