NASA Thrust Equation gets destroyed. | |
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oniongrass User ID: 77403676 United States 03/04/2019 08:54 PM Report Abusive Post Report Copyright Violation | The "NASA Equation" looked right. v dm/dt is effectively the propulsion force, where v is the speed of fluid exit of the nozzle relative to the rocket body. They should set F on the left side of the equation to zero (out in space there is roughly no net force on the rocket) and solve for the acceleration. I didn't check whether they did the fluid flow substitutions right. But at the end of the video she talks about a hole in the side of a vacuum cleaner nozzle. It's more like a rocket if there is no hole in the side. If you put another hole in the side of the pressure vessel that's exhausted out thru the rocket nozzle, you'd lose a lot of thrust too. . DON'T VAX, PROPHYLAX! ____________ There is no anger in Me: If one offers Me thorns and thistles, I will march to battle against him, And set all of them on fire. But if he holds fast to My refuge, He makes Me his friend; He makes Me his friend. (Isaiah 27:4-5) |
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Anonymous Coward User ID: 77428394 United States 03/04/2019 08:59 PM Report Abusive Post Report Copyright Violation | The "NASA Equation" looked right. v dm/dt is effectively the propulsion force, where v is the speed of fluid exit of the nozzle relative to the rocket body. They should set F on the left side of the equation to zero (out in space there is roughly no net force on the rocket) and solve for the acceleration. Quoting: oniongrass I didn't check whether they did the fluid flow substitutions right. But at the end of the video she talks about a hole in the side of a vacuum cleaner nozzle. It's more like a rocket if there is no hole in the side. If you put another hole in the side of the pressure vessel that's exhausted out thru the rocket nozzle, you'd lose a lot of thrust too. The side hole is the allow the outside air to enter the pipe for continuous pressurization of the pipe as to fill the void created by the vacuum |
Anonymous Coward User ID: 76809044 United States 03/04/2019 08:59 PM Report Abusive Post Report Copyright Violation | actually, Technically speaking this whole topic falls under the domain of Jet Propulsion Theory. [link to en.wikipedia.org (secure)] |
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LHP598 User ID: 77166529 United States 03/04/2019 09:13 PM Report Abusive Post Report Copyright Violation | OP, please explain the ISS and other satellites seen in the sky per published sighting schedules....how did they all get up there...and stay up there? Quoting: Anonymous Coward 4448622 Prove that satellites exist in space and you’re not just seeing a plane flying by. How many planes do you know of that fly at 400 km up? If you have to insist that you've won an Internet argument, you've probably lost badly. - Danth's Law |
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Anonymous Coward User ID: 75338391 United States 03/04/2019 09:19 PM Report Abusive Post Report Copyright Violation | OP, please explain the ISS and other satellites seen in the sky per published sighting schedules....how did they all get up there...and stay up there? Quoting: Anonymous Coward 4448622 Prove that satellites exist in space and you’re not just seeing a plane flying by. How many planes do you know of that fly at 400 km up? Still could be a plane or balloon |
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LHP598 User ID: 77166529 United States 03/04/2019 09:47 PM Report Abusive Post Report Copyright Violation | OP, please explain the ISS and other satellites seen in the sky per published sighting schedules....how did they all get up there...and stay up there? Quoting: Anonymous Coward 4448622 Prove that satellites exist in space and you’re not just seeing a plane flying by. How many planes do you know of that fly at 400 km up? Still could be a plane or balloon You didn't actually watch the videos, did you? Planes don't fly at 250 miles up. If you have to insist that you've won an Internet argument, you've probably lost badly. - Danth's Law |
Anonymous Coward User ID: 76809044 United States 03/04/2019 09:53 PM Report Abusive Post Report Copyright Violation | Is glp censoring op’s video.? You know the one in the comment section of the original post video Quoting: Anonymous Coward 77428485 [link to www.youtube.com (secure)] |
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