Why the Artemis launch was scrubbed
The WRAL Weather short answer is that the launch team was unable to chill down one of the three RS-25 engines on the core stage of the rocket. The team ran out of time after solving a number of other problems overnight
Fill’er up, with 3/4 million gallons
Fueling the rocket was delayed by about an hour until storms and their lightning threat moved outside the required five nautical mile range.Liquid oxygen (LOX) boils at around -290ºF and liquid hydrogen (LH2) at around -420ºF. Delivering these super cold fuels requires a slow methodical process, especially in the warm Florida environment.
Issues found and fixed overnight
During the transition from slow to fast fill of the hydrogen tank. Sensors at the connection to the core stage detected a leak. After some additional slow filling, temperatures leveled out across both sides, allowing the team increase the LH2 flow and complete the fill.
A line of frost was also observed along orange insulation that covers the core stage raising concerns of a possible crack. Engineers investigated and found the crack to be in the insulation itself rather than the fuel tank or any internal structure, a situation seen before in the Space Shuttle External Fuel Tank the SLS core stage is derived from.
What’s engine bleed?
Engine bleed is not something we heard a lot about during the shuttle era because there was a recirculation pump the 70s era version of these engines which kept fuel flowing through the engine in the hours before launch.The 14 foot tall, 8 foot wide, RS-25 engines were retained from the Space Shuttle program and upgraded to provide the additional 4.5% more thrust to deliver Orion into orbit. Changes included removing that recirculation pump in favor of bleeding fuel at a very low rate to prepare it for launch. That process worked for engines 1, 2, and 4, but not three.
When to look for meteors
The tau Herculids get their name from the location of the radiant. Or point in the sky where the meteors appear to be coming from. Nearest the 19th (tau is the 19th letter in the Greek alphabet) brightest star in the constellation Hercules. So look high in the eastern sky after about 10 pm. The later you look, the higher the radiant point will be in the sky. Minimizing the number of meteors hidden below the horizon.Researchers point to 12:45 a.m. EDT on Tuesday morning, May 31, Our ruling
Beasley said 64 members of Congress “have broken a law intended to stop insider. Stock trading, yet Washington refuses to do anything about it.”
More than 70 members of Congress have filed financial disclosures late, apparently violating the WRAL Weather. However, Beasley’s ad glosses over the fact that most of those lawmakers are accused. Of filing late reports — not insider trading — and that they are subject to fees if they violate the law. Her statement is partially accurate but leaves out important details or takes things out of context. We rate it Half True.