|
REPORT ABUSIVE REPLY
|
|
Message Subject
|
Moon Hoax - Rockets CANNOT work in space
|
|
Poster Handle
|
Dr. Astro |
|
Post Content
|
to expand and clarify on the last question-- the maximum exhaust velocities are: Propellant mix - Effective exhaust velocity (m/s) liquid oxygen/liquid hydrogen - 4462 ( 16,063km/h) liquid oxygen/kerosene (RP-1) - 3510 nitrogen tetroxide/hydrazine - 3369 [ link to en.wikipedia.org] "The delta-v needed to achieve low earth orbit starts around 9.4km/s [ 33,840km/h]". [ link to en.wikipedia.org] So the wheels spin at 30km/h but the car travels at 60km/h??? Rocket science -- like real science but without the pesky facts.  You're an idiot. A complete idiot. Let's say a rocket is traveling at a ground-relative velocity of 33,840 km/hr (that's faster than your velocity in low earth orbit, the extra delta-V is needed to get you above the atmosphere, but for the sake of the hypothetical let's go with it) and burns in a retrograde direction with an exhaust velocity of 16,063 km/hr. What is the ground-relative velocity of the exhaust at the beginning of the burn? What is the velocity of the exhaust relative to the rocket? Go on, answer these questions. Let's say you're a (not very) useful idiot. A rocket cannot travel faster than the maximum exhaust velocity. A 16,063 km/h exhaust CANNOT propel a rocket through the atmosphere at 33,840 km/h. Period. Are you kidding me? Get off my case, ignoramus kid! Tsiolkovsky rocket equation (from wikipedia, the only source that you handle, and badly): "The equation relates the delta-v (the maximum change of speed of the rocket if no other external forces act) with the effective exhaust velocity and the initial and final mass of a rocket (or other reaction engine)." [ link to en.wikipedia.org] A tip: 1. Go to the school. 2. Study the basics: mathematics, chemistry, and physics. 3. Develop critical thinking skills, and learn to search about a topic. 4. After all that, come here and waste your free time talking about woo woo rocketry. Period.  ^This
|
|
|
Please verify you're human:
|
|
|
Reason for reporting:
|
