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1
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by DuncanDoenitz on Today at 11:20:13 PM »
Yes, I have and he understands that a pressurized environment must exist for a plume to form.

Do his superiors and the engineers that designed the equipment he works on understand it?
Of course they do.

If he were to ask the people who trained him about rockets and vacuums what would they say?
Pretty much the same thing I am.

Are you smarter than them or are they lying to hide the truth?
Lying about what?


You have an admirable confidence that:
a.   You have understood what your nephew means, and vice versa.
b.   You nephew has fully understood what he has been taught. 
c.   The jet engine designers, engineers and technicians are also in accordance with you. 

However;

http://www.valentiniweb.com/piermo/meccanica/mat/Rolls%20Royce%20-%20The%20Jet%20Engine.pdf

This is a link to a pdf version of a go-to publication in the UK, and also much of the English-speaking world.  It is called "The Jet Engine" (ISBN 0 902121 2 35) and its published by Rolls Royce, who know a couple of things about them.  The book is standard reading for anyone in the UK who is embarking on a career in aircraft engines.  It outlines the principles of theory, design, construction and maintnenane, and not just of Rolls Royce products. 

I draw your attention to Part 1 "Basic mechanics", page 2, Paras 6 thru 9:

6. Jet propulsion is a practical application of Sir
Isaac Newton's third law of motion which states that,
'for every force acting on a body there is an opposite
and equal reaction'. For aircraft propulsion, the 'body'
is atmospheric air that is caused to accelerate as it
passes through the engine. The force required to
give this acceleration has an equal effect in the
opposite direction acting on the apparatus producing
the acceleration. A jet engine produces thrust in a
similar way to the engine/propeller combination. Both
propel the aircraft by thrusting a large weight of air
backwards (fig. 1-3), one in the form of a large air
slipstream at comparatively low speed and the other
in the form of a jet of gas at very high speed.
7. This same principle of reaction occurs in all forms
of movement and has been usefully applied in many
ways. The earliest known example of jet reaction is
that of Hero's engine (fig. 1-4) produced as a toy in
120 B.C. This toy showed how the momentum of
steam issuing from a number of jets could impart an
equal and opposite reaction to the jets themselves,
thus causing the engine to revolve.
8. The familiar whirling garden sprinkler (fig. 1-5) is
a more practical example of this principle, for the
mechanism rotates by virtue of the reaction to the
water jets. The high pressure jets of modern firefighting equipment are an example of 'jet reaction',
for often, due to the reaction of the water jet, the hose
cannot be held or controlled by one fireman. Perhaps
the simplest illustration of this principle is afforded by
the carnival balloon which, when the air or gas is
released, rushes rapidly away in the direction
opposite to the jet.
9. Jet reaction is definitely an internal phenomenon
and does not, as is frequently assumed, result from
the pressure of the jet on the atmosphere.
In fact, the
jet propulsion engine, whether rocket, athodyd, or
turbo-jet, is a piece of apparatus designed to
accelerate a stream of air or gas and to expel it at
high velocity. There are, of course, a number of ways .....

I can find no mention of "plume" in the book, but be my guest.  Perhaps you could discuss this further with your nephew. 

Edit; my Bold, btw.
2
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Realestfake on Today at 10:41:50 PM »
What "angular momentum?"

I’m not talking about rockets in this case. I’m asking simply if you believe the concept of conservation of angular momentum to be correct. Out of curiosity. Literally a yes or no question.
3
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Action80 on Today at 10:05:33 PM »
Yes, I have and he understands that a pressurized environment must exist for a plume to form.

Do his superiors and the engineers that designed the equipment he works on understand it?
Of course they do.

If he were to ask the people who trained him about rockets and vacuums what would they say?
Pretty much the same thing I am.

Are you smarter than them or are they lying to hide the truth?
Lying about what?
4
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Action80 on Today at 10:03:24 PM »
Do everyone a favor, okay?

Go peddle your nonsensical crapola elsewhere.

I am done with your dissimilar anologies.

Okay. Do you believe in conservation of angular momentum? If not, explain why (according to Action80ian physics) a ballerina speeds up when they pull their arms in.
I don’t know which part was nonsensical. Please be specific  :)
Or at the very least - try to keep up!
What "angular momentum?" A rocket is pointed toward a direction during the propulsion phase (i.e., linear momentum).  If a rocket, taking off in a pressurized environment, enters a non-pressurized environment, it will continue to move until an equal opposite force acts upon it. But its movement will soon cease because the plume can no longer maintain its integrity.

Take any one of your analogies and feel free to apply the adjective "nonsense."

Is that specific enough for you? I hope so because it is true.

Very true.
5
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Dr Van Nostrand on Today at 09:59:05 PM »
Yes, I have and he understands that a pressurized environment must exist for a plume to form.

Do his superiors and the engineers that designed the equipment he works on understand it?
If he were to ask the people who trained him about rockets and vacuums what would they say?

Are you smarter than them or are they lying to hide the truth?
6
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Realestfake on Today at 09:25:32 PM »
Do everyone a favor, okay?

Go peddle your nonsensical crapola elsewhere.

I am done with your dissimilar anologies.

Okay. Do you believe in conservation of angular momentum? If not, explain why (according to Action80ian physics) a ballerina speeds up when they pull their arms in.
I don’t know which part was nonsensical. Please be specific  :)
Or at the very least - try to keep up!
7
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Realestfake on Today at 09:24:14 PM »
The plume is like any appendage and is what allows the rocket or jet to push off the atmoplane.

No defined exhaust (plume)... no movement.

Yeahh you’re going to need some supporting evidence or reasoning. Your claim is wildly inconsistent with basic observation.
8
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Action80 on Today at 09:20:33 PM »
Jesus, you double down to claim it is only an internal combustion absent any exhaust resulting in movement.

…what? Please reread what was said.
Why does a ballerina speed up when they pull their arms in?
Do everyone a favor, okay?

Go peddle your nonsensical crapola elsewhere.

I am done with your dissimilar anologies.
9
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Action80 on Today at 09:18:47 PM »
@Action. First of all respect to your nephew; serving his country in the military and then transferring those learned skills to the airline industry.  Similar career path to mine, though in the UK. 

Following up on Dr v-N, I wonder if you have actually discussed jet engine theory with your nephew, or whether you are just throwing in random relatives in the hope that it will lend your argument some kudos.  My sister is a nurse, but that wouldn't reinforce any argument I might make about Covid. 

And I don't like labouring a point, but you still haven't explained how the presence of a plume lends thrust to the jet/rocket.
Yes, I have and he understands that a pressurized environment must exist for a plume to form.

The plume is like any appendage and is what allows the rocket or jet to push off the atmoplane.

No defined exhaust (plume)... no movement.
10
Science & Alternative Science / Re: Do rockets push off the air?
« Last post by Realestfake on Today at 09:18:24 PM »
Jesus, you double down to claim it is only an internal combustion absent any exhaust resulting in movement.

…what? Please reread what was said.
Why does a ballerina speed up when they pull their arms in?