China successfully completes hypersonic engine test

[Ultima Thule]

Well last time I checked acceleration due to gravity on earth is 9.8 m/sec-square. And earth is moving at about 90 Mach.

Hint: Acceleration and Velocity are not same. But then it is Chinese analysts we are talking about.


He is not trolling, Chinese military analysts have yet to develop understanding of second derivative in differential calculus.


Actually he is right. Your analyst does not understand difference between acceleration and velocity. Skipped high-school may be?

But he is talking about ISS which is in space and we are talking about scramjet which will be used on upper atmosphere @BringHarmony

 

[BringHarmony]

But he is talking about ISS which is in space and we are talking about scramjet which will be used on upper atmosphere @BringHarmony

And?

You only feel it if there is a sudden change in direction. Try twirling yourself. You get dizzy in no time.

Have you ever been in a car crash? Or have you ever hit the breaks hard to stop suddenly? If you had you would have known what @Hamartia Antidote is talking about.

 

[Ultima Thule]

And?

there is lots of difference between space and upper atmosphere, there are minimal G lock in space because of low gravity as compare to upper atmosphere due to accelerations @BringHarmony

 

[BringHarmony]

there is lots of difference between space and upper atmosphere, there are minimal G lock in space because of low gravity as compare to upper atmosphere due to accelerations @BringHarmony

I know someone who rode Concorde supersonic. During supersonic flight they didn't notice anything. He was even able to catch few zzz. But yeah, the guy was also involved in a car crash once. He went from 80KM to 0KM in matters of milliseconds. It hurt him really bad.

BTW, Gs are not velocity.

 

[Ultima Thule]

I know someone who rode Concorde supersonic. During supersonic flight they didn't notice anything. He was even able to catch few zzz. But yeah, the guy was also involved in a car crash once. He went from 80KM to 0KM in matters of milliseconds. It hurt him really bad.

BTW, Gs are not velocity.

because he was concealed and didn't expose in the cockpit, and yeah i know Gs is for acceleration not from velocity/Top speed @BringHarmony

 

[Hamartia Antidote]

there is lots of difference between space and upper atmosphere, there are minimal G lock in space because of low gravity as compare to upper atmosphere due to accelerations @BringHarmony

It’s not that much different. They are only between 330 and 430km up. That’s still in the high 8’s in terms of meters per sec per sec.

https://www.vcalc.com/wiki/KurtHeckman/Gravity+Acceleration+by+Altitude

The ISS is basicallly like being in a perpetually falling elevator.

Turn the ISS suddenly in any direction and the astronauts will hit the walls and feel G forces.

 

[BringHarmony]

because he was concealed and didn't expose in the cockpit

Oh! care to explain what do you mean here?

BTW, you do know about pseudo forces in accelerated frame of reference? It applies both in cabin and cockpit. Both are same frame of reference.

 

[nang2]

since no human could stand long periods of hypersonic flights

I don't understand this statement. Aren't astronauts flying with hypersonic speed in the space station? Maybe it is the hypersonic flight in the atmosphere that could be problematic?

 

[BringHarmony]

I don't understand this statement. Aren't astronauts flying with hypersonic speed in the space station? Maybe it is the hypersonic flight in the atmosphere that could be problematic?

Naah, he does not know difference between Velocity and Acceleration.

 

[Hamartia Antidote]

I don't understand this statement. Aren't astronauts flying with hypersonic speed in the space station? Maybe it is the hypersonic flight in the atmosphere that could be problematic?

The environment doesn’t make much of a difference. The only issue you have is if you went from 0 to Mach 6 in a very short period of time (your body would turn to mush) OR you were going at Mach 6 and did a sudden change of direction hurtling you and your brain slam against the wall of the ship as your momentum keeps you going straight at Mach 6 while the ship is not.

 

[Awi]

So you agree with me that it is very possible to fly in a Mach 6 airplane without any ill effects and it is puzzling why Wei Xudong specifically said you can't.

Ahhh, so troll it is, history have seen huge empires going down the drain when they were fighting none other than the greatest enemy of human being, the jealousy. It will ruin your life, if you keep doing this. Look at the east of Pakistan, India has done anything they could to nullify Pakistan and yet they somehow manage to screw themselves. Any ditch they dig for Pakistan, somehow they find themselves in it.
As for as flying at this speed and that speed, you clearly have no understanding of physics. So, please leave it to those who understand it. For a person like you who is always willing to learn new things, I will say go read up on resistance, gravity, acceleration, G-force, believe me your knowledge will increase many times, I can clearly see that.
BTW, I don't really have much time to comeback and have a troll fest with you, so over and all from me to you.

For others who don't know the problem at hand,
A jet has to deal with higher gravitational pull, higher air resistance and electromagnetic forces, and is designed to do extreme maneuvers, which will exert heavy Gs on a pilot as the speed will increase, at Mach 4 it will be hard for the jet to make a turn, at mach 6 it will be almost impossible for the jet to even make a slight turn. US SR-71 sometimes passed over multiple countries to complete a circle while flying at Mach 3.2+ speeds.
On the other hand, ISS is moving in an almost vacuum space (experiencing very low resistance), and on top of that due to it's distance from earth has lesser gravitational force applying on it than what a jet would experience, Funny part is that a jet's engine needs that air to burn and make it fly, which means if a jet goes too high it won't have much air to burn and won't fly.

For a jet, more speed means more trouble, while for ISS enormous speed of mach 22+ is it's power that keeps it in the orbit around earth and doesn't let it do a complete free fall to earth, although it is falling towards earth. It just have to increase it's altitude regularly so that it doesn't just fall to earth, and for that it uses thrust boosters of docked vessels most of the time, although it has it's own ways of doing so as well.

 

[Hamartia Antidote]

Ahhh, so troll it is, history have seen huge empires going down the drain when they were fighting none other than the greatest enemy of human being, the jealousy. It will ruin your life, if you keep doing this. Look at the east of Pakistan, India has done anything they could to nullify Pakistan and yet they somehow manage to screw themselves. Any ditch they dig for Pakistan, somehow they find themselves in it.
As for as flying at this speed and that speed, you clearly have no understanding of physics. So, please leave it to those who understand it. For a person like you who is always willing to learn new things, I will say go read up on resistance, gravity, acceleration, G-force, believe me your knowledge will increase many times, I can clearly see that.
BTW, I don't really have much time to comeback and have a troll fest with you, so over and all from me to you.

For others who don't know the problem at hand,
A jet has to deal with higher gravitational pull, higher air resistance and electromagnetic forces, and is designed to do extreme maneuvers, which will exert heavy Gs on a pilot as the speed will increase, at Mach 4 it will be hard for the jet to make a turn, at mach 6 it will be almost impossible for the jet to even make a slight turn. US SR-71 sometimes passed over multiple countries to complete a circle while flying at Mach 3.2+ speeds.
On the other hand, ISS is moving in an almost vacuum space (experiencing very low resistance), and on top of that due to it's distance from earth has lesser gravitational force applying on it than what a jet would experience, Funny part is that a jet's engine needs that air to burn and make it fly, which means if a jet goes too high it won't have much air to burn and won't fly.

For a jet, more speed means more trouble, while for ISS enormous speed of mach 22+ is it's power that keeps it in the orbit around earth and doesn't let it do a complete free fall to earth, although it is falling towards earth. It just have to increase it's altitude regularly so that it doesn't just fall to earth, and for that it uses thrust boosters of docked vessels most of the time, although it has it's own ways of doing so as well.

Read all the replies here first troll (including the Chinese member one in #23 making the same observation as mine).

 

[Awi]

Read all the replies here first troll (including the Chinese member one in #23 making the same observation as mine).

#23 is merely asking for some clarification because of not having enough understanding of the science that goes behind it. Read that post again, I think you are losing your mind now.
Only 2 members are trolling here, one has just discovered calculus and the other should stick to ONLY posting science articles. I enjoy those scientific articles you post but It's really hard to see the murder of science of relativity and basic understanding of physics you guys are doing here.
Although thanks for the smile, your posts were very entertaining, but I will introduce the 2nd derivative here, and it's that you both are Indians, which is why value of 2nd derivative is negative and is taking this thread down the drain. @BringHarmony, I hope you enjoy this 2nd derivative I am throwing in here.

 

[BringHarmony]

Although thanks for the smile, your posts were very entertaining, but I will introduce the 2nd derivative here, and it's that you both are Indians, which is why value of 2nd derivative is negative and is taking this thread down the drain. @BringHarmony, I hope you enjoy this 2nd derivative I am throwing in here.

No thats not second derivative, that's Pakistan's standard deviation working here. When you cann't argue logically, deviate to calling people Indians.

 

[oprih]

Good job China!
Meanwhile this thread has an infestation of butthurt muricans and their shameless lapdogs.