Space and Science BS Thread

I was wondering how this iteration of SLS testing compared to Saturn V testing back in the day…

https://twitter.com/sciguyspace/status/1511081474711302172?s=21&t=o7oJPFeb88ZRSsMCeysUcg

 

https://twitter.com/nasagroundsys/status/1511086165004361729?s=21&t=o7oJPFeb88ZRSsMCeysUcg

 

https://twitter.com/nasahistory/status/1511090486827696128?s=21&t=o7oJPFeb88ZRSsMCeysUcg

 

The LH2 vent valve that they couldn't get to cycle, I installed and serviced that in years passed. We tested and tested and tested and tested to make sure timing was tight, no delays when signal was sent, the travel was the correct length...they can be very finnicky. We would sit there and have Nasa test director cycle that valve from 4 miles away hundreds and hundreds of times and I would be sitting there with a caliper on the glands making sure each time it cycled it traveled the exact same length. Sometimes it would, sometimes it wouldn't. Then I would have to figure out why it wasn't consistent.

 

Were you ever able to figure it out?

 

Yes for a period of time and then absolutely nothing would change and we wouldn't be getting signal or they would call for it to go half open and it would open a quarter or call for full open and it would open a half. This was during more of a construction phase where we would have camera guys, fireex systems,welders with fire blankets guys crawling all over our skid of valves and it was very easy for something to get kicked and knock everything out of whack.

 

Ah. Do you think you and your guys will be called back out to replace the valve?

 

Seems like they’re done for today

https://twitter.com/nasakennedy/status/1511328999691235328?s=21&t=ToSel9d2THR2Ksfb7pUJ3A

 

That valve is no longer an immediate concern of mine, they have plenty of expertise to fix it, it's just going through the process and procedure of alterations to the paperwork that is directing the work flow. Paper always dictates the action, there is 60 years of experience in Lh2 shop between 2 guys, they only move when the paper is correct.

I'll ask them whats up with it and pass it along when I hear but as far as my supervision knows...wet dress is pushed until next week.

 

Well hopefully that means they can get AX-1 and Crew4 launched

 

Yep hard push to get Ax1 launched and C4 launched while Sls is at a stopping point. Brass says they are competing for resources w/ SLS.

 

Something to keep an eye on..
https://twitter.com/spacedotcom/status/1511415992878043137?s=21&t=AOsPmqYVJo8wKqFIIBvlLg

 

SLS WDR on hold until after Ax-1 launch on Friday:
https://twitter.com/spacex/status/1511436369796599808?s=21&t=AOsPmqYVJo8wKqFIIBvlLg

 

https://twitter.com/emrekelly/status/1511440612662427651?s=21&t=Int8U4FFigmUsetlfPhT1w

 

Hmmm. Left closed? Or corroded closed?

 

Corroded closed?

Like someone tried to open it, couldn’t, then said, “fuck it” and left it at that?

 

Maybe. Or like the problem they had last year.

 

Getting ready to meet Nichole Stott. She went up in 2000 and was a part of class XVIII.

 

Maybe @Hunterdc1 can weigh in but reading the tweet again, seems like there was a valve that was supposed to be opened at some point in pre-launch procedures but was missed.

Last year’s stuck valves on the Starliner seemed to me to be remotely, automated valves that got corroded over time. Not manual valves.

 

Cool! How’s that happening?