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(Ars Technica)   It's happening, isn't it? NOTAM filed for the Starship 15km hop Friday through Sunday   (arstechnica.com) divider line
    More: Cool, Rocket, Starship vehicle, Elon Musk, company's founder, temporary flight restriction, chief engineer, Starship launch, percent chance  
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660 clicks; posted to STEM » on 02 Dec 2020 at 5:52 PM (12 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



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2020-12-02 5:00:09 PM  
10 votes:

lolmao500: The company's founder and chief engineer, Elon Musk, has said SpaceX will attempt to fly Starship to an altitude of 15km to demonstrate the performance of three Raptor engines over the course of several minutes. The company's previous flights to about 150 meters, in August and September, used a single Raptor engine.
This higher flight profile will take Starship above nearly 90 percent of Earth's atmosphere

The author is a dumbass.

90% of earth's atmosphere is 90km, not 15. Space is at 100 km altitude.


The atmosphere isn't uniformly dense up to a sharp cutoff at 100km. Most of it is near sea level.
 
2020-12-02 7:02:40 PM  
6 votes:

lolmao500: Noticeably F.A.T.: lolmao500: The company's founder and chief engineer, Elon Musk, has said SpaceX will attempt to fly Starship to an altitude of 15km to demonstrate the performance of three Raptor engines over the course of several minutes. The company's previous flights to about 150 meters, in August and September, used a single Raptor engine.
This higher flight profile will take Starship above nearly 90 percent of Earth's atmosphere

The author is a dumbass.

90% of earth's atmosphere is 90km, not 15. Space is at 100 km altitude.

The atmosphere isn't uniformly dense up to a sharp cutoff at 100km. Most of it is near sea level.

Well space is recognized internationally at 100 km.

If you want to get technical, you could say that the atmosphere ends at around 10 000 km altitude with the exosphere.

If the author wanted to be right, he should have said that the flight will go above nearly 90% of earth's troposphere.


Doubling down on your farking ignorant statement.  For shame.

The arbitrary line for where space begins is not even relevant here.  Indeed Earth's atmosphere extends for many thousands of miles. The ISS is in the atmosphere and because of atmospheric drag must occasionally fire thrusters to raise its orbit.

When someone says x is above 90% of the atmosphere, what they mean is above 90% of the air molecules of the atmosphere. This meaning is standard and indeed the only meaning that even makes a lick of sense.
 
2020-12-02 5:03:47 PM  
5 votes:

Noticeably F.A.T.: lolmao500: The company's founder and chief engineer, Elon Musk, has said SpaceX will attempt to fly Starship to an altitude of 15km to demonstrate the performance of three Raptor engines over the course of several minutes. The company's previous flights to about 150 meters, in August and September, used a single Raptor engine.
This higher flight profile will take Starship above nearly 90 percent of Earth's atmosphere

The author is a dumbass.

90% of earth's atmosphere is 90km, not 15. Space is at 100 km altitude.

The atmosphere isn't uniformly dense up to a sharp cutoff at 100km. Most of it is near sea level.


This.  Air pressure at 15km is about 10% of that at sea level.
 
2020-12-02 5:04:06 PM  
4 votes:

lolmao500: The company's founder and chief engineer, Elon Musk, has said SpaceX will attempt to fly Starship to an altitude of 15km to demonstrate the performance of three Raptor engines over the course of several minutes. The company's previous flights to about 150 meters, in August and September, used a single Raptor engine.
This higher flight profile will take Starship above nearly 90 percent of Earth's atmosphere

The author is a dumbass.

90% of earth's atmosphere is 90km, not 15. Space is at 100 km altitude.


15km is just a bit under 50,000' ... about 15% of sea level density

Fark user imageView Full Size
 
2020-12-02 8:29:19 PM  
2 votes:

Shotgun Justice: Imagine a hamburger.


Sorry that was as far as I could get. Now I want a hamburger.
 
2020-12-02 7:28:27 PM  
1 vote:

Shotgun Justice: Okay, for you pedantic types, the author meant that the vehicle will go above 90% of the atmosphere's mass.


He is not being pedantic, he is just dead wrong.
 
2020-12-02 7:05:03 PM  
1 vote:
Okay, for you pedantic types, the author meant that the vehicle will go above 90% of the atmosphere's mass.
 
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