Re: Konstantin Tsiolokvsky was wrong?!

"Spaceman" <Realspace@xxxxxxxxxxx> wrote in message
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"Greg Neill" <gneillREM@xxxxxxxxxxxxxxxxxx> wrote in message
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"Spaceman" <Realspace@xxxxxxxxxxx> wrote in message
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<matt271829-news@xxxxxxxxxxx> wrote in message
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Spaceman wrote:

You have done it again,
You have assumed a constant that does nto exist
as a reality.
Please answer
What is e standing for in reality to make it constant?
And why would you use a constant that has no
representation in reality?

As I understand it, e is the speed that the propellant shoots out of
the back end of the rocket, measured relative to the rocket. What's the
problem with that?

Such (the speed propellant shoots out at) is not a constant.

It can be if the rocket engine fuel is appropriately
metered.

It can never be relatively constant,

Why? If the fuel is fed at a constant rate and the
burn continues at a constant rate, and the pressure in
the combustion chamber is constant, why would the
exhaust speed not be constant relative to the rocket?

unless of course you make up a new "transform"
and then you can make it constant to all observers..

Specious nonsense.


It has acceleration and also has a top speed and an end speed of
0 after it stops.

Huh? The exhaust is driven by pressure from the rocket
oriface. If the pressure is constant (constant combustion)
then the exit velocity will be constant.

The pressure is not constant,
as soon as 1 millionth of a psi is released
the pressure is not the same.
The pressure is a variable unless it is in
a closed system
and rockets are far from closed systems.

The pressure in the combustion chamber is in a dynamic
equilibrium. It is maintained by feeding fuel at a
rate that maintains the thrust at a constant level.

(even closed systems have variable pressures
inside if you move it around)
Sheesh!
You sure don't know phsyics!

What is the magnitude of the effect you're complaining
about? Make an estimate of the variationin pressure
over time.


It can be as close to constant as desired.

No it can't.
There is nothing about an open system that is
constant.

James has never heard of feedback or dynamic process
control. James is a little whiner who looks for
irrelevant nits to pick because he can't do math.
He can't even state the magnitude of any effects he
proposes as problematic. James is a loser.


.

Relevant Pages

  • Re: Konstantin Tsiolokvsky was wrong?!
    ... What is e standing for in reality to make it constant? ... the back end of the rocket, ... The exhaust is driven by pressure from the rocket ... and rockets are far from closed systems. ...
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  • Re: Konstantin Tsiolokvsky was wrong?!
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