Discussion:
"SpaceX’s Starship goes sci-fi shiny with stainless steel skin"
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Lynn McGuire
2018-12-29 02:01:28 UTC
Permalink
"SpaceX’s Starship goes sci-fi shiny with stainless steel skin"

https://techcrunch.com/2018/12/26/spacexs-starship-goes-sci-fi-shiny-with-stainless-steel-skin/

"SpaceX’s futuristic Starship interplanetary craft may embody the golden
age of sci-fi in more ways than one: in addition to (theoretically)
taking passengers from planet to planet, it may sport a shiny stainless
steel skin that makes it look like the pulp covers of old."

Super cool !

Lynn
J. Clarke
2018-12-29 03:01:33 UTC
Permalink
On Fri, 28 Dec 2018 20:01:28 -0600, Lynn McGuire
"SpaceX’s Starship goes sci-fi shiny with stainless steel skin"
https://techcrunch.com/2018/12/26/spacexs-starship-goes-sci-fi-shiny-with-stainless-steel-skin/
"SpaceX’s futuristic Starship interplanetary craft may embody the golden
age of sci-fi in more ways than one: in addition to (theoretically)
taking passengers from planet to planet, it may sport a shiny stainless
steel skin that makes it look like the pulp covers of old."
Super cool !
It's not clear what they're actually using. 300 series is rather
ordinary stainless steel but SX500 is not steel at all, it's a nickel
superalloy of the sort that eats diamond blades for breakfast.

I suspect that they're going in the direction of the X-15 which had
nickel superalloy skin.
Dimensional Traveler
2018-12-29 07:27:22 UTC
Permalink
Post by J. Clarke
On Fri, 28 Dec 2018 20:01:28 -0600, Lynn McGuire
Post by Lynn McGuire
"SpaceX’s Starship goes sci-fi shiny with stainless steel skin"
https://techcrunch.com/2018/12/26/spacexs-starship-goes-sci-fi-shiny-with-stainless-steel-skin/
"SpaceX’s futuristic Starship interplanetary craft may embody the golden
age of sci-fi in more ways than one: in addition to (theoretically)
taking passengers from planet to planet, it may sport a shiny stainless
steel skin that makes it look like the pulp covers of old."
Super cool !
It's not clear what they're actually using. 300 series is rather
ordinary stainless steel but SX500 is not steel at all, it's a nickel
superalloy of the sort that eats diamond blades for breakfast.
I suspect that they're going in the direction of the X-15 which had
nickel superalloy skin.
Well if they're going shiny silver spaceship skin they HAVE to use a
superalloy!
--
Inquiring minds want to know while minds with a self-preservation
instinct are running screaming.
J. Clarke
2018-12-29 07:37:19 UTC
Permalink
On Fri, 28 Dec 2018 23:27:22 -0800, Dimensional Traveler
Post by Dimensional Traveler
Post by J. Clarke
On Fri, 28 Dec 2018 20:01:28 -0600, Lynn McGuire
"SpaceX’s Starship goes sci-fi shiny with stainless steel skin"
https://techcrunch.com/2018/12/26/spacexs-starship-goes-sci-fi-shiny-with-stainless-steel-skin/
"SpaceX’s futuristic Starship interplanetary craft may embody the golden
age of sci-fi in more ways than one: in addition to (theoretically)
taking passengers from planet to planet, it may sport a shiny stainless
steel skin that makes it look like the pulp covers of old."
Super cool !
It's not clear what they're actually using. 300 series is rather
ordinary stainless steel but SX500 is not steel at all, it's a nickel
superalloy of the sort that eats diamond blades for breakfast.
I suspect that they're going in the direction of the X-15 which had
nickel superalloy skin.
Well if they're going shiny silver spaceship skin they HAVE to use a
superalloy!
Unless they're managing somehow to provide adequate heat dissipation
with ordinary stainless steel. They will have cryogenic propellants
onboard--perhaps some quantity of those can be sacrificed for the
purpose of cooling. He did say 300 series, which is not in the class
of superalloys. Like I said, it's not clear what they are doing.
Thomas Koenig
2018-12-30 15:30:35 UTC
Permalink
Post by J. Clarke
Post by Dimensional Traveler
Well if they're going shiny silver spaceship skin they HAVE to use a
superalloy!
Unless they're managing somehow to provide adequate heat dissipation
with ordinary stainless steel.
Usuall stainless steels (of the 1.4404 or 316L variety) has
a head conductivity of around 15 W/(m*K), a typical Ni-based
alloy like 2.4605 has around 10, both at room temperature.

No advantage there.
Post by J. Clarke
They will have cryogenic propellants
onboard--perhaps some quantity of those can be sacrificed for the
purpose of cooling. He did say 300 series, which is not in the class
of superalloys. Like I said, it's not clear what they are doing.
AFAIK, that is what they plan on doing.
J. Clarke
2018-12-30 16:52:23 UTC
Permalink
On Sun, 30 Dec 2018 15:30:35 -0000 (UTC), Thomas Koenig
Post by Thomas Koenig
Post by J. Clarke
Post by Dimensional Traveler
Well if they're going shiny silver spaceship skin they HAVE to use a
superalloy!
Unless they're managing somehow to provide adequate heat dissipation
with ordinary stainless steel.
Usuall stainless steels (of the 1.4404 or 316L variety) has
a head conductivity of around 15 W/(m*K), a typical Ni-based
alloy like 2.4605 has around 10, both at room temperature.
No advantage there.
The advantage is that the nickel superalloy needs less heat
dissipation because it can withstand higher temperatures.
Post by Thomas Koenig
Post by J. Clarke
They will have cryogenic propellants
onboard--perhaps some quantity of those can be sacrificed for the
purpose of cooling. He did say 300 series, which is not in the class
of superalloys. Like I said, it's not clear what they are doing.
AFAIK, that is what they plan on doing.
Do you have inside information? If not then what leads you to believe
that you know more about what they are doing than the rest of us?
Thomas Koenig
2018-12-30 17:43:50 UTC
Permalink
Post by J. Clarke
On Sun, 30 Dec 2018 15:30:35 -0000 (UTC), Thomas Koenig
Post by Thomas Koenig
Post by J. Clarke
Post by Dimensional Traveler
Well if they're going shiny silver spaceship skin they HAVE to use a
superalloy!
Unless they're managing somehow to provide adequate heat dissipation
with ordinary stainless steel.
Usuall stainless steels (of the 1.4404 or 316L variety) has
a head conductivity of around 15 W/(m*K), a typical Ni-based
alloy like 2.4605 has around 10, both at room temperature.
No advantage there.
The advantage is that the nickel superalloy needs less heat
dissipation because it can withstand higher temperatures.
Post by Thomas Koenig
Post by J. Clarke
They will have cryogenic propellants
onboard--perhaps some quantity of those can be sacrificed for the
purpose of cooling. He did say 300 series, which is not in the class
of superalloys. Like I said, it's not clear what they are doing.
AFAIK, that is what they plan on doing.
Do you have inside information? If not then what leads you to believe
that you know more about what they are doing than the rest of us?
Elon Musk's Twitter account.

https://twitter.com/elonmusk/status/1077353613997920257?s=19
J. Clarke
2018-12-30 17:58:36 UTC
Permalink
On Sun, 30 Dec 2018 17:43:50 -0000 (UTC), Thomas Koenig
Post by Thomas Koenig
Post by J. Clarke
On Sun, 30 Dec 2018 15:30:35 -0000 (UTC), Thomas Koenig
Post by Thomas Koenig
Post by J. Clarke
Post by Dimensional Traveler
Well if they're going shiny silver spaceship skin they HAVE to use a
superalloy!
Unless they're managing somehow to provide adequate heat dissipation
with ordinary stainless steel.
Usuall stainless steels (of the 1.4404 or 316L variety) has
a head conductivity of around 15 W/(m*K), a typical Ni-based
alloy like 2.4605 has around 10, both at room temperature.
No advantage there.
The advantage is that the nickel superalloy needs less heat
dissipation because it can withstand higher temperatures.
Post by Thomas Koenig
Post by J. Clarke
They will have cryogenic propellants
onboard--perhaps some quantity of those can be sacrificed for the
purpose of cooling. He did say 300 series, which is not in the class
of superalloys. Like I said, it's not clear what they are doing.
AFAIK, that is what they plan on doing.
Do you have inside information? If not then what leads you to believe
that you know more about what they are doing than the rest of us?
Elon Musk's Twitter account.
https://twitter.com/elonmusk/status/1077353613997920257?s=19
Thanks.

Lynn McGuire
2018-12-29 21:02:59 UTC
Permalink
Post by J. Clarke
On Fri, 28 Dec 2018 20:01:28 -0600, Lynn McGuire
Post by Lynn McGuire
"SpaceX’s Starship goes sci-fi shiny with stainless steel skin"
https://techcrunch.com/2018/12/26/spacexs-starship-goes-sci-fi-shiny-with-stainless-steel-skin/
"SpaceX’s futuristic Starship interplanetary craft may embody the golden
age of sci-fi in more ways than one: in addition to (theoretically)
taking passengers from planet to planet, it may sport a shiny stainless
steel skin that makes it look like the pulp covers of old."
Super cool !
It's not clear what they're actually using. 300 series is rather
ordinary stainless steel but SX500 is not steel at all, it's a nickel
superalloy of the sort that eats diamond blades for breakfast.
I suspect that they're going in the direction of the X-15 which had
nickel superalloy skin.
Since the skin will be the integrated heat shield, I am with you. A
high nickel superalloy sounds more malleable and heat resistant. Also
corrosion resistant since he is planning on using the vehicle near and
on the coastlines. I have no knowledge of the ultra cryogenic abilities
of nickel superalloys though, I am not many people do at the 3 ??? K 10
??? K of deep space when in the shadow of the Sun.

Lynn
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