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Article #18moon landing report...almost finished!!!
From: Forni
Date: Thu, 15 Jun 2000 00:00
Date: Thu, 15 Jun 2000 00:00
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3223 bytes
Hi everybody, finally my report is almost finished! Thanks A LOT to all those nice people who helped me. This morning I showed my work to my lecturer and il looks like he likes it! Anyway, I still have to fix few things and I'm asking your help again. This is the Tsiolkovsky equation with variable gravity inserted: Vfin = V0 + U ln( Mr+g / Mr ) -g(h)t is it correct? Escape velocity from earth is 11.2 km/s Which is the most used value in aerospace flight? I mean, that's the physical value, but in real flights a little higher value should be needed. What was the orbital velocity of the CSM/LM around the moon? How did exactly the LM landed? Which was the techic used? Did the LM got separated from the CSM and then applied a force in the same verse and direction of its orbit so that it could do a ballistic arc (relative to the moon) and therefore, land? Sort of the inverse example of Newton's cannon ball. The LM was orbiting around the moon, at time t it was in a point in orbit like the cannon ball at the tip of the mountain, then it applied a force in the same direction and verse of it orbit, decelerating its orbital velocity and landing with a ballistic arc like the first times when the cannon ball can't get to orbit. I don't know if I made myself clear :-)))) Another possibility, did the lunar module was "shot" (with its engines of course) from the CSM in a direction towards the moon with a inclination angle that could let it do a quite long ballistic arc too? Which was the way chosen? Which were the vertical and horizontal velocity of the lunar module in its last minutes of descent? I suppose there was a range of vertical and horizontal velocity values for the landing of the lunar module; with higher values, there would have been a crash. Do you know these values? That's all! :-) Thanks!!! ciao, Ippolito
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 106700,5435bb26c9736672,start X-Google-Attributes: gid106700,public X-Google-Thread: fdc67,5435bb26c9736672,start X-Google-Attributes: gidfdc67,public X-Google-Thread: 10857a,5435bb26c9736672,start X-Google-Attributes: gid10857a,public X-Google-Thread: f74ae,5435bb26c9736672,start X-Google-Attributes: gidf74ae,public X-Google-Thread: 1027d4,5435bb26c9736672,start X-Google-Attributes: gid1027d4,public X-Google-Thread: 10cf28,5435bb26c9736672,start X-Google-Attributes: gid10cf28,public X-Google-Thread: 11206d,5435bb26c9736672,start X-Google-Attributes: gid11206d,public X-Google-Thread: 10b271,5435bb26c9736672,start X-Google-Attributes: gid10b271,public From: Forni <ip.forni@isiline.it> Subject: moon landing report...almost finished!!! Date: 2000/06/15 Message-ID: <3948EB6B.63E663F0@isiline.it> X-Deja-AN: 634908275 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii X-Complaints-To: usenet@news.polito.it X-Trace: menelao.polito.it 961080043 14846 213.144.69.238 (15 Jun 2000 14:40:43 GMT) Organization: Unknown Mime-Version: 1.0 NNTP-Posting-Date: 15 Jun 2000 14:40:43 GMT Newsgroups: sci.astro.seti,sci.physics,alt.astronomy,alt.sci.astro,de.sci.astronomie,fr.sci.astronomie,sci.astro,uk.sci.astronomy