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Musk plans for mars
On Tuesday, September 27, 2016 at 3:41:42 PM UTC-4, JF Mezei wrote:
Musk outlined some plans for mars colonisation. He says the plan is to bring transport costs down by many orders of magnitudes so tha Musk wants to R&D so that carbon fibre can be used for tanks. Just a note of advice. Before actual flight to Mars, a human rated rocket needs to be demonstrated. AND a human rated orbiter and lander and re-lifter needs demonstration. Also the engine for the trip needs lifting to orbit at Earth also. FalconX is failed and nonhuman ratable. So Musk need to begin finally. NOW. Is the design even in the cad stations even? Is Musk playing a sales pitch or are engineers functioning? The best way for Musk to go to Mars is to use NASA's booster. Orion is the name or Delta? Use Orion Musk. |
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Musk plans for mars
JF Mezei wrote:
On 2017-03-16 02:00, Fred J. McCall wrote: What would be the point of that other than to flush more and more money into the sewer? You won't 'cut funding' overall. You'll just cut the annual requirement while spending more overall before you have a flyable system. The whole point of Ares and then SLS/Orion was to keep generating pork jobs in politically sensitive areas and pork contracts to companies who make nice big donations to the party. Shuttle killed, replaced with Ares. Ares killed, replaced with SLS. If they kill SLS/Orion, there would be intense lobby pressure to replace it with some new pork project. Musk may have Trump's ears, but lobbyists for the "legacy" space business have all of congressmens' wallets. That is why I am thinking that scaling back budget for the rocket to nowhere saves on annual budget while not requiring the government start a replacement project. Why not just take a pile of cash out in the parking lot and burn it? -- "Some people get lost in thought because it's such unfamiliar territory." --G. Behn |
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Musk plans for mars
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Musk plans for mars
JF Mezei wrote:
On 2017-03-18 12:19, Jeff Findley wrote: Yes. For ICBMs they're a huge advantage (store for many decades, yet can be launched at a moment's notice). But large solids have several disadvantages for launch vehicles. I was wondering about that. SpaceX, which developped its own tech instead of relying on external contractors, did not choose solids. Because SpaceX wanted actual reusability. Russia appears to be set on kerosene. right ? Russia tends to use 'half stages', where they just dump a bunch of engines off. However, Arianne uses SRBs. Sometimes. With 1970s technologies (era when Shuttle designed), could they have build the Shuttle with _expandable_ liquid boosters and launch in same time and budget ? Yep. One of the designs had liquid fueled flyback boosters. We've seen that even with 21st century tech, returning liquid rockets to ground is a challenge, so perhaps having re-usable liquid boosters for Shuttle was not even close to realistic in the 1970s. It was just more expensive than the alternative solids. Were SRBs chosen because it was the only way to make a claim of re-usability since they can be dunked in salt water and re-used ? No. Different slant to question: if re-usability had not been such an important aspect, would NASA have chosen liquids instead of solids for the Shuttle boosters or would SRBs still have been a necessary evil to give the needed performance ? No. Once they got rid of flyback boosters, solids were bigger 'bang for the buck' than anything else. Anyone know if Arianne 5 chose SRBs for engineering or political reasons? People choose SRBs because they're cheaper for the amount of thrust they can deliver. -- "The reasonable man adapts himself to the world; the unreasonable man persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man." --George Bernard Shaw |
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