MaltenesePhysics t1_isrl8jf wrote on October 18, 2022 at 4:33 AM

Reply to comment by FTR_1077 in NASA outlines case for making sole-source SLS award to Boeing-Northrop joint venture by jeffsmith202

FH will never be human rated, but I don’t consider SLS human rated. The ECLSS is disabled/missing for Artemis 1, something absolutely critical for Human Spaceflight. It’s ludicrous that there’s no ECLSS on mission 1 to shake out issues, but that’s another story. It’s like they’re begging for something to fail on A2, when they could’ve just tested on A1.

Hussar_Regimeny t1_isrnaql wrote on October 18, 2022 at 4:56 AM

> ECLSS

I should point out that the ECLSS has been tested extenstively on the ground already. Sending up with A1 will give little to no new data. The only way to stress test an ECLSS is to have humans aboard. Plus parts of it at the very least have been tested onboard the ISS

Plus it's not uncommon to not place the ECLSS on flights. DM-1 didn't have one and then DM-2 flew with humans and with the ECLSS for the first time. So this isn't the ludicrous action you think it is.

MaltenesePhysics t1_isth0j0 wrote on October 18, 2022 at 4:09 PM

That’s not true. DM-1 had its ECLSS installed and enabled. They ran into some issues with it during flight, even with no crew aboard. You can’t find unexpected issues with a system without having the system installed. It doesn’t make sense for them to not take the opportunity to test the entire system in deep space.