Xd the great Posted July 20, 2018 Share Posted July 20, 2018 I think it means that the moon is in the way of rocket and ground controllers cannot see the rocket clearly. Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted July 20, 2018 Share Posted July 20, 2018 1 hour ago, Wjolcz said: There's even illumination of the Moon. I understand solar activity since it could mess with the radio, but moon illumination? Maybe they are superstitious about the full moon and want to avoid it. Quote Link to comment Share on other sites More sharing options...
Mad Rocket Scientist Posted July 20, 2018 Share Posted July 20, 2018 4 hours ago, Wjolcz said: There's even illumination of the Moon. I understand solar activity since it could mess with the radio, but moon illumination? Maybe it's for visibility? Quote Link to comment Share on other sites More sharing options...
IncongruousGoat Posted July 20, 2018 Share Posted July 20, 2018 4 hours ago, Wjolcz said: There's even illumination of the Moon. I understand solar activity since it could mess with the radio, but moon illumination? I'm guessing it's some kind of standard forecast format for more than just launches. Moonlight might not be terribly relevant to a rocket launch, but it could easily matter to other things the military might be doing. Quote Link to comment Share on other sites More sharing options...
Xd the great Posted July 20, 2018 Share Posted July 20, 2018 40 minutes ago, IncongruousGoat said: I'm guessing it's some kind of standard forecast format for more than just launches. Moonlight might not be terribly relevant to a rocket launch, but it could easily matter to other things the military might be doing. Such as? Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted July 20, 2018 Share Posted July 20, 2018 (edited) Spoiler Maybe they just take into account horoscopes? Bright Moon → full Moon → opposition of Sun and Moon → negative aspect, so on Btw where are Mars and Jupiter in the list? They can effect the launch, too, if in Scorpio. Edited July 20, 2018 by kerbiloid Quote Link to comment Share on other sites More sharing options...
Wjolcz Posted July 20, 2018 Share Posted July 20, 2018 5 hours ago, Xd the great said: Such as? Who knows? It's the military. Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted July 20, 2018 Share Posted July 20, 2018 6 hours ago, Xd the great said: Such as? I'd tell you, but then I'd have to kill you... Quote Link to comment Share on other sites More sharing options...
Xd the great Posted July 20, 2018 Share Posted July 20, 2018 Huh, aliens. Anywau, why wont spacex use solid rocket motors on the dragon capsule? They are cheap and powerful... Quote Link to comment Share on other sites More sharing options...
magnemoe Posted July 20, 2018 Share Posted July 20, 2018 2 hours ago, Wjolcz said: Who knows? It's the military. An full moon give an far lighter night who is relevant for night operations, know it was an factor during d-day. Quote Link to comment Share on other sites More sharing options...
RealKerbal3x Posted July 20, 2018 Share Posted July 20, 2018 48 minutes ago, Xd the great said: Huh, aliens. Anywau, why wont spacex use solid rocket motors on the dragon capsule? They are cheap and powerful... Probably because Dragon will have 7 humans onboard, and SRMs aren't the safest of propulsion systems. Yes, hypergolic fuels are still dangerous, but not as dangerous as solids, which are essentially giant fireworks that can't be shut down. Look at the Space Shuttle. Quote Link to comment Share on other sites More sharing options...
Xd the great Posted July 20, 2018 Share Posted July 20, 2018 40 minutes ago, RealKerbal3x said: Probably because Dragon will have 7 humans onboard, and SRMs aren't the safest of propulsion systems. Yes, hypergolic fuels are still dangerous, but not as dangerous as solids, which are essentially giant fireworks that can't be shut down. Look at the Space Shuttle. Ahh i see your point... When will elon ride one of these? Quote Link to comment Share on other sites More sharing options...
RealKerbal3x Posted July 20, 2018 Share Posted July 20, 2018 2 minutes ago, Xd the great said: When will elon ride one of these? Who knows? Maybe when they've got the BFR Mars transportation architecture up and running he'll automatically get a ticket. Elon once said: 'I would like to die on Mars, just not on impact.' Quote Link to comment Share on other sites More sharing options...
tater Posted July 20, 2018 Share Posted July 20, 2018 36 minutes ago, Xd the great said: Ahh i see your point... When will elon ride one of these? When did Von Braun (or any other engineer, or contractor) ride on Mercury, Gemini, or Apollo? FWIW, Gwynne Shotwell is stocked about point to point rocket travel for herself (to avoid many long flights she takes), and says that's a thing inside 10 years (her timeframe, not Elon's). I'll believe that when I see it, but the willingness to ride is certainly there. Quote Link to comment Share on other sites More sharing options...
Xd the great Posted July 20, 2018 Share Posted July 20, 2018 20 minutes ago, tater said: When did Von Braun (or any other engineer, or contractor) ride on Mercury, Gemini, or Apollo? FWIW, Gwynne Shotwell is stocked about point to point rocket travel for herself (to avoid many long flights she takes), and says that's a thing inside 10 years (her timeframe, not Elon's). I'll believe that when I see it, but the willingness to ride is certainly there. This is a person who sent his personal car into orbit around the Sun. I bet a test pilot will be himself, to demonstrate safety of his rockets. Quote Link to comment Share on other sites More sharing options...
cubinator Posted July 20, 2018 Share Posted July 20, 2018 2 hours ago, RealKerbal3x said: Who knows? Maybe when they've got the BFR Mars transportation architecture up and running he'll automatically get a ticket. Elon once said: 'I would like to die on Mars, just not on impact.' I think he'll fly to orbit, and maybe even make a visit to the Moon if things are really going well, but he's probably most needed on Earth until Mars colonization is well underway, and that's where he'll be until then. Quote Link to comment Share on other sites More sharing options...
tater Posted July 20, 2018 Share Posted July 20, 2018 Quote Link to comment Share on other sites More sharing options...
Brotoro Posted July 20, 2018 Share Posted July 20, 2018 Sag! Quote Link to comment Share on other sites More sharing options...
IncongruousGoat Posted July 21, 2018 Share Posted July 21, 2018 11 hours ago, Xd the great said: Huh, aliens. Anywau, why wont spacex use solid rocket motors on the dragon capsule? They are cheap and powerful... And not remotely throttleable or reusable. Or a technology SpaceX has any experience with whatsoever. They've made a point of using no solids at all on everything they've built, down to using non-pyrotechnic separation mechanisms. It's unlikely that they'd start now, especially when there exists an alternative. Also, you have to remember that SpaceX were planning to propulsively land Dragon V2, which would have required deep-throttling liquid engines, such as SuperDraco. Oh, and they aren't really cheap either, not at the kinds of prices SpaceX can built liquids at. Solid booster manufacture is not as trivial a process as some people may make it out to be. I will grant you the powerful part, though with the kinds of thrust-to-weight ratios SpaceX can achieve that qualification becomes increasingly insignificant. Quote Link to comment Share on other sites More sharing options...
Rakaydos Posted July 21, 2018 Share Posted July 21, 2018 Fuel wise, Solids are actually pretty darn expensive. It's only the fact that the "engine" consists of a nozzle and a reinforced fuel tank as the combustion chamber that makes them cheaper than liquid fuel engines. Once you can return the expensive liquid engine safely to earth, refueling it is relatively cheap. (refurbishment is another matter, but can be solved in the design phase) Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted July 21, 2018 Share Posted July 21, 2018 And solids are heavy Quote Link to comment Share on other sites More sharing options...
Xd the great Posted July 21, 2018 Share Posted July 21, 2018 Ah i see. Thanks. Dragon will not do retro firing like the soyuz? Quote Link to comment Share on other sites More sharing options...
sh1pman Posted July 21, 2018 Share Posted July 21, 2018 30 minutes ago, Xd the great said: Ah i see. Thanks. Dragon will not do retro firing like the soyuz? No. No need to retro fire when you're splashing down in the ocean. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted July 21, 2018 Share Posted July 21, 2018 Booyah. Two up, two down in five days. Quote Link to comment Share on other sites More sharing options...
Mad Rocket Scientist Posted July 21, 2018 Share Posted July 21, 2018 A bit of already guessed at news about Starlink: Quote Link to comment Share on other sites More sharing options...
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