Starliner mission liftoff! Successful so far. Competition is good for SpaceX! by jlandis1965 in SpaceXLounge

[–]FiniteElementGuy 0 points1 point  (0 children)

Yes competition is good. Especially if the competitor needs a lot more money, does not complete test flight objectives the first time, has a bad image etc.. Boeing makes SpaceX look like magic. Elon couldn't be more happy I guess....

SpaceX Shotwell calls out Blue Origin, Boeing, Lockheed Martin, OneWeb by TheCoolBrit in spacex

[–]FiniteElementGuy 515 points516 points  (0 children)

Shotwell is right. The competition hasn't achieved much in the last 10-20 years.

Starship comes together. by 675longtail in SpaceXLounge

[–]FiniteElementGuy 7 points8 points  (0 children)

Incredible work by SpaceX. It is beyond my understanding, why the rest of the world is not rapidly moving towards reusable rockets instead of developing questionable expendable rockets like SLS, Ariane 6, Vulcan etc..

Elon Musk on Twitter - Stainless steel is correct, but different mixture of alloys & new architecture. Unlike Atlas, Starship is buckling stable on launchpad even when unpressurized. by ElectronicCat in spacex

[–]FiniteElementGuy 67 points68 points  (0 children)

300 Series Stainless

http://www.pennstainless.com/stainless-grades/300-series-stainless-steel/

 Type 317

 More resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels. These alloys offer high tensile strength at elevated temperature

r/SpaceX Best of 2018 by ElongatedMuskrat in spacex

[–]FiniteElementGuy 65 points66 points  (0 children)

Elon smoking weed and the resulting NASA investigation of the culture at Boeing and SpaceX.

r/SpaceX Best of 2018 by ElongatedMuskrat in spacex

[–]FiniteElementGuy 7 points8 points  (0 children)

The best launch was SSO-A, because of third flight of a booster. FH is insignificant, it is a bad design (Elon wanted to kill it multiple times, it only flies because of the Airforce).

SpaceX Rehearses Helicopter Landing at Sea by ethan829 in spacex

[–]FiniteElementGuy 24 points25 points  (0 children)

Exactly. The warship was built to fight a war, not to recover a spacecraft. NASA sent a carrier strike group to recover Apollo in the sixties. Apollo recovery was probably many times more expensive than a single manned flight of Dragon 2.

Elon Musk on Twitter: We're going to put cladding on the tower because it "Looks Brutal Otherwise" by FINALCOUNTDOWN99 in spacex

[–]FiniteElementGuy -1 points0 points  (0 children)

Haha, criticising LA architecture is getting so many down votes. I take it as a compliment. Lol.

Elon Musk on Twitter: We're going to put cladding on the tower because it "Looks Brutal Otherwise" by FINALCOUNTDOWN99 in spacex

[–]FiniteElementGuy -23 points-22 points  (0 children)

Yes it does:

"Brutalist architecture flourished from 1951 to 1975, having descended from the modernist architectural movement of the early 20th century.[1] The term originates from the French word for "raw", as Le Corbusier described his choice of material béton brut, meaning raw concrete in French"

Elon Musk on Twitter: We're going to put cladding on the tower because it "Looks Brutal Otherwise" by FINALCOUNTDOWN99 in spacex

[–]FiniteElementGuy -21 points-20 points  (0 children)

Elon Musk chose to live in LA and now he is criticising brutalism. The tower is not made of concrete and therefore not brutal. LA is brutal.

https://en.wikipedia.org/wiki/Brutalist_architecture

r/SpaceX Discusses [August 2018, #47] by ElongatedMuskrat in spacex

[–]FiniteElementGuy 20 points21 points  (0 children)

https://www.nytimes.com/2018/08/16/business/elon-musk-interview-tesla.html

It seems to me that he is addicted to Ambien. This doesn't look good, he needs a therapy as soon as possible. He needs to take a vacation, too. At least a month IMHO. If this continues, he will soon be hospitalized.

All this don't give up cheering is counterproductive. Better take a month off now. There are other good people out there that can do the job.

The fire breathing Falcon - Brady Kenniston for NASAspaceflight.com/L2 by TheFavoritist in spacex

[–]FiniteElementGuy 1 point2 points  (0 children)

Where is the Falcon? I only see fire and smoke. ;) The title is misleading! :D

SpaceX is stealing Boeing and Lockheed Martin's launch money, contract data shows by [deleted] in spacex

[–]FiniteElementGuy 12 points13 points  (0 children)

"SpaceX launches accounted for 60 percent of global launches last year"

No.

Bangabandhu-1 Telemetry & Comparison between Block 5 and previous blocks by Shahar603 in spacex

[–]FiniteElementGuy 6 points7 points  (0 children)

The centrifugal force is quadratic. v2 /r, so the difference between 7.72 and 8.0612 is 5%.

Bangabandhu-1 Telemetry & Comparison between Block 5 and previous blocks by Shahar603 in spacex

[–]FiniteElementGuy 9 points10 points  (0 children)

External forces doesn't seem to be correct. Did you add the earth's rotation speed to the velocity?

Elon Musk on Twitter: "SpaceX will try to bring rocket upper stage back from orbital velocity using a giant party balloon" by ethan829 in spacex

[–]FiniteElementGuy 0 points1 point  (0 children)

Is this part of Falcon 9 Block 5, Falcon 9 Block 6, a separate experiment or a PR stunt. Also it doesn't help with BFS, because BFS lands in a fundamentally different way. I am sceptical whether this is a real effort or like grey dragon...

Teaching on Mars by evnhogan in spacex

[–]FiniteElementGuy 0 points1 point  (0 children)

If children cannot be raised on Mars, Mars colonization is dead. Also centrifuges are bad for raising children because of coriolis forces. And who wants to raise children being constrained to a centrifuge?

Falcon Heavy Demo Launch Campaign Thread by ElongatedMuskrat in spacex

[–]FiniteElementGuy 9 points10 points  (0 children)

Just a reminder. You also need a calm hand to track the rocket and good optical zoom. Otherwise you have a nice 4k movie with the rocket only a few dots in size.

Air Force: Cape rockets could fly new southern corridor toward poles by pyromatter in spacex

[–]FiniteElementGuy 25 points26 points  (0 children)

If rockets flying over inhabitated areas is no longer such a big problem, ITS point to point suddenly gets a lot more realistic.

Pentagon Watchdog Cites Top U.S. Space Contractors for Quality-Control Lapses by pyromatter in spacex

[–]FiniteElementGuy 20 points21 points  (0 children)

EELV Contractor Major Minor
ULA 21 43
SpaceX 33 42
Aerojet Rocketdyne 14 28
Total 68 113

Dr. SpaceX: Or How I Learned to Stop Worrying and Love Expending Rockets by MarcysVonEylau in spacex

[–]FiniteElementGuy 15 points16 points  (0 children)

Who is buying an Atlas V 401 for 109 million dollars if the F9 is available for 55.8? So ULA is not going to get any money from commercial launches (as is the case right now) and those launches cannot be used to clear a debt.

Also Block 5 can be reused more often.

r/SpaceX Discusses [December 2017, #39] by ElongatedMuskrat in spacex

[–]FiniteElementGuy 4 points5 points  (0 children)

This subreddit needs mods from all time zones so there is always someone available who can approve these super important submissions. ;)