Kosh's Shadow 2/18/2021 5:00:32 PM

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In #25 Occasional Reader said: It's a godawful small affair, to the girl with the mousy hair... 

Jukebox

Kosh's Shadow 2/18/2021 5:06:26 PM

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The Martian atmosphere is too thin to use aerobraking and parachutes to land a lander big enough to carry people. That will take retrorockets.

NASA has wanted data on how rockets behave when flying into a thin atmosphere, but the cost of a dedicated mission on Earth is too high for the rocket. (Even higher to fly to Mars) NASA has the instruments.

SpaceX boosters encounter similar conditions in their turnaround burn to land. SpaceX needed that data, but they don't have the instruments. (This was before any of the booster landings).

So NASA and SpaceX made a deal. NASA would take measurements, supply them to SpaceX, and use the data for their own purposes. A win-win deal.

turn 2/18/2021 5:19:53 PM

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In #2 Kosh's Shadow said: So NASA and SpaceX made a deal. NASA would take measurements, supply them to SpaceX, and use the data for their own purposes. A win-win deal.

I didn’t know that, thanks for sharing. I’m assuming Musk can put the data to good use in the design of the Starship too. As I understand it right now his team is faced with the design challenge of the heat shield tiles on the Starship. They are trying to minimize the number of tiles and work out the critical separation distance between them. I read something about this, I think if they are too close and they pry each other loose and too far away the skin melts through.

turn 2/18/2021 5:21:52 PM

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Reply to turn in 3:
We’ll they need to work on the landing a bit too! Ha

Kosh's Shadow 2/18/2021 5:23:18 PM

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In #3 turn said: I didn’t know that, thanks for sharing. I’m assuming Musk can put the data to good use in the design of the Starship too. As I understand it right now his team is faced with the design challenge of the heat shield tiles on the Starship. They are trying to minimize the number of tiles and work out the critical separation distance between them. I read something about this, I think if they are too close and they pry each other loose and too far away the skin melts through.

Tiles were a big Space Shuttle problem, too. Hard to deal with something that expands under heat.  You canna change the laws of physics!

turn 2/18/2021 5:29:14 PM

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Reply to turn in 3:
Found the article.

~snip~

According to Musk, what SpaceX is trying to determine with those coupon-style tests is how to install a heat shield with tiles that are neither too close together or too far apart.

LINK

JCM 2/18/2021 5:36:26 PM

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CTE was another tile issue on the Shuttle the Tiles and substructure expanded at different rates stress the adhesion matrix.

turn 2/18/2021 5:37:54 PM

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In #5 Kosh's Shadow said: You canna change the laws of physics!

You got that right, now tell that to AOC and her green energy fantasies./

The Starship design (unlike the shuttle) will use just one hexagonal tile shape for economy. Plus that shape is ideal in that it won’t allow for the plasma to travel in a straight line which would tend to cause more damage (as I understand it).

turn 2/18/2021 5:43:21 PM

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Reply to JCM in 7:
CTE? 

turn 2/18/2021 5:48:50 PM

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Kosh's Shadow 2/18/2021 5:49:15 PM

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In #8 turn said: In #5 Kosh's Shadow said: You canna change the laws of physics! You got that right, now tell that to AOC and her green energy fantasies./

The laws of physics are racist, just like math

I suggest anyone who thinks that go to health care practitioners who feel the same when calculating dosages, and their families are NOT allowed to sue if a mistake is made because the provider is a POC.

JCM 2/18/2021 5:50:00 PM

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Reply to turn in 9:

Coefficient of Thermal Expansion. Expansion rate of materials at various temperatures.

Occasional Reader 2/18/2021 6:07:48 PM

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Reply to turn in 10:

Where the hell are the busty Barsoomian princesses? 

Kosh's Shadow 2/18/2021 6:13:09 PM

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In #13 Occasional Reader said: Where the hell are the busty Barsoomian princesses? 

I want to open the first pub on Mars - called Bar-soom

turn 2/18/2021 6:14:47 PM

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Reply to JCM in 12:
Ahhh of course, thanks.

Kosh's Shadow 2/18/2021 6:15:38 PM

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turn 2/18/2021 6:16:39 PM

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In #13 Occasional Reader said: Where the hell are the busty Barsoomian princesses? 

Why they’re hiding in the canals of course!

Kosh's Shadow 2/18/2021 6:19:38 PM

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In #13 Occasional Reader said: Where the hell are the busty Barsoomian princesses? 

I think we've had this conversation before, or is it a case of Deja Vu Thoris?

Occasional Reader 2/18/2021 6:37:09 PM

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In #14 Kosh's Shadow said: I want to open the first pub on Mars - called Bar-soom

I would never drink there, because I suffer from an irrational fear of one of the moons of Mars (Phobosphobia).

Kosh's Shadow 2/18/2021 6:54:12 PM

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In #19 Occasional Reader said: I would never drink there, because I suffer from an irrational fear of one of the moons of Mars (Phobosphobia).

You need to conquer your Deimos

Occasional Reader 2/18/2021 7:04:11 PM

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