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Old 17th April 2019, 09:23 AM   #27
Critical Thinker
Join Date: Mar 2019
Posts: 286
Originally Posted by JayUtah View Post
No, it is not assumed -- it is observed and measured. The de Laval nozzle dates back to Victorian times, used in steam turbine engines. The pressure "gradient" is converted to velocity, which is expressed in your equation as Ve.

I already pointed out that your derivation of the "pressure gradient force" was in error because you wrongly conflated two concepts in the derivation of the rocket equation. You did not address that. Before you claim that no one has refuted you, you must address the posts in which they do just that.
How is it observed? Why is there no unedited video of a rocket in space? When wind blows on the back of your head, why donít you feel the air in front of you push off your face as it moves away from you?
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