News Vulcan: ULA's Next Generation Launcher

TheShuttleExperience said:
Wow, I would expect the loss of a nozzle to be catastrophic (at least for the booster and eventually for the rest of the LV too).
Click to expand...
The solid motor will just burn regardless. Unless something lodges in the nozzle throat there would be no cause for any over-pressure events that would destroy the casing. And unlike regeneratively cooled liquid engines, failure of the nozzle bell wouldn't be particularly combustible.

The Challenger accident occurred when a SRB o-ring joint blew out and a stream of burning gas impinged on the external tank. The SRB itself did not explode - it continued to burn (albeit with lower chamber pressure and thrust). Both SRBs survived the explosion and breakup and flew for a time before range safety terminated them.
 
Thunder Chicken said:
What exactly do those percentages represent? What would be "100% of Inclination"? Are there four separate points for the four axes?

This smells like someone manipulating plot axes and their ranges to make a nice looking plot for advertising.
Click to expand...
I think he explained the plot once... yeah, it would be nice to have absolute numbers. but this way they can use the same plot for DOD missions.
 
Thunder Chicken said:
The Challenger accident occurred when a SRB o-ring joint blew out and a stream of burning gas impinged on the external tank. The SRB itself did not explode - it continued to burn (albeit with lower chamber pressure and thrust). Both SRBs survived the explosion and breakup and flew for a time before range safety terminated them.
Click to expand...
I had the investigation report as a video on VHS in the late 90s. There wasn't really an "explosion" but rather a deflagration. The orbiter itself was destroyed due to aerodynamic overstress when it became loose rapidly.

A booster failure or anomaly can have catastrophic consequences or close calls. For STS-51L it was "just" a failing O-Ring. Also remember Soyuz MS-10...
 
Last edited:
Thunder Chicken said:
The Challenger accident occurred when a SRB o-ring joint blew out and a stream of burning gas impinged on the external tank. The SRB itself did not explode - it continued to burn (albeit with lower chamber pressure and thrust). Both SRBs survived the explosion and breakup and flew for a time before range safety terminated them.
Click to expand...

More so, the flame jet of the booster welding through the tank hull didn't cause an explosion itself, since the hydrogen tank didn't contain any oxygen to start a combustion. The hydrogen just gave the flame a different colour for some long seconds. Things decided to go their own way, when the structure of the tank failed and the aft tank dome fell off. But I am not sure right now, if this happened before or after the aft attachment of the booster failed and I am too lazy to look right now.

What ever happened in which order: It was fast and it was catastrophic. Most final things only became known because the core rope memory of the computers was still there to be read out.
 
Another "observation" :rolleyes:

(T0 at 22:40)

https://twitter.com/x/status/2021989144751198326
https://twitter.com/x/status/2021883496302604552

https://twitter.com/x/status/2021914314739736735

https://twitter.com/x/status/2021889699502010874
HA8x9mybsAAM0m-

HA8x9mwawAEvgDq

HA8x9mTW4AAcH9k
 
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