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Senate Launch System continues to delay development
https://arstechnica.com/science/2019...ellant-depots/
Basically, NASA is so invested in SLS they apparently don't want to develop other tech. I love the part about how Falcon 9 Heavy is mythical (at the time) while SLS isn't... |
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Senate Launch System continues to delay development
On Aug/1/2019 Ã* 19:42, Greg (Strider) Moore wrote :
https://arstechnica.com/science/2019...ellant-depots/ Basically, NASA is so invested in SLS they apparently don't want to develop other tech. I love the part about how Falcon 9 Heavy is mythical (at the time) while SLS isn't... SLS isn't mythical. It is very real. It's a real boondoggle. Alain Fournier |
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Senate Launch System continues to delay development
On 8/2/2019 7:48 AM, Jeff Findley wrote:
In article , says... Today, NASA signed an agreement with SpaceX to develop in space refueling technology (presumably for Starship). That conversation on Twitter is what spurred ULA's former chief scientist to Tweet about the above. I love the part about how Falcon 9 Heavy is mythical (at the time) while SLS isn't... Yeah, that was always disingenuous considering how much commonality there is between the (then flying) Falcon 9 and the (then under development) Falcon Heavy. SLS, by comparison, is pretty much all new except for the SSMEs they took off of all of the orbiters that are in museums. That was an eye-roller for me too, even at the time and of course, remains so. Just look at the cost per flight numbers. Says it all... Oh, and Ars Technica, and Eric Berger in particular, publish great articles about "space". I like their online forums as well. Jeff Agreed. Dave |
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Senate Launch System continues to delay development
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Senate Launch System continues to delay development
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Senate Launch System continues to delay development
In article ,
says... On 2019-08-03 13:05, Jeff Findley wrote: said, the only things being reused are the SSMEs and those got new engine controllers and are being used in expendable mode at a higher thrust setting than they were used on shuttle missions. Considering the number of times NASA has bragged about SSMEs engine tests, are they really "expendanble" since they seem to be test fired many times over the last few years? They're being used on SLS in an expendable mode. That's a fact. The RS-25E engines that will be "new builds" will almost certainly be test fired before being used *once* on SLS in an expendable mode. No doubt some tweaks to the design were made with that in mind. All of the shuttle ET tooling was destroyed. If there had been no political interference, when Constallation was replaced with SLS, would the core still have been ET-like and sent to Michoud for construction? aka: is the concept/design sound or did they impose an ET-like design to help Michoud? The destruction of the ET tooling dates back to the Ares I/Ares V days. So if you want to blame someone, blame than NASA Administrator Mike Griffin for that. Without tooling and work for some time, I take it Michoud had to start from scratch when it got contract for SLS main tank? Pretty much. They bragged a lot about the new tooling and (new to Michoud) friction stir welding, which they had a *lot* of problems with. the nozzle into chunks. The core stage has not been test fired yet. Physically, can they test fire the core stage standing up without 2 boosters attached? Yes. That's the whole point of the "Green Run" tests. NASA did the same with the Saturn V's first stage. This whole SLS program is being run in a back to the 60s and 70s way, IMHO. Lots of tests at lots of different sites, making sure the pork is spread around. July 25, 2019 ?Green Run? Test Will Pave the Way for Successful NASA Moon Missions https://www.nasa.gov/exploration/sys...est-paves-way- for-nasa-moon-missions.html Jeff -- All opinions posted by me on Usenet News are mine, and mine alone. These posts do not reflect the opinions of my family, friends, employer, or any organization that I am a member of. |
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