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Just a continuation of my quest I looked up Apollo's payload to weight of its fuel system ratio with 18394/(22783+10300) equating to about 55% of the landing propulsion system as fuel and engines. If the 13.8 Mt mentioned above is correct, then is it realistic to say that only 6.1 tons is...

2 part This post is in 2 parts, the first is way off topic, but is a responce to Admiral_Ritt, the second part is a few other questions and concerns. The shuttle's efficiency was under used over its service period. Aero capture was a concept I discussed indepth with others and there hasn't...

A few other questions First off, I want to thank you very much for your help. I checked and double checked the numbers and if I'm correct its 13.8 mT land-able from the original 53mT using 3.15 +.9 +1.87 km/s for TLI to landing. What mass of this do you think the lander itself will take up...

If it wasn't for the TI89 I would be in real trouble I hope I am getting my math right here: The ISP for LH2/LOX (I'm modeling after that because the lander may be reused as a hopper later on) is 450s I multiplied that by 9.8m/(s^2) and got 4410m/s for the Ve. Now what? I know the TLI DeltaV is...

Manned mission denied I wasn't thinking about a manned mission. More of a lunar probe mission. I remember astrobotic's mission outline and they were using a falcon 9 but would only land a rover and the lander itself and that would be half the payload fairing if I recall. I'm trying to figure...

First off, I'm not entirely sure this is the right category so please move it if you feel the need to. I first want to point out that I work with computer hardware and rockets are not my thing. But I've been wondering if there are any good articles or areas to delve into that could give a...

sharing the family album Taken about a year ago

Greetings from Montana Hello, I'm in college to become a computer engineer, Love robotics, love just about every aspect of engineering (except the cost), and enjoy simulators. Figured this is the place to learn more about orbital mechanics and maybe some modeling advice.