Posted in Architecture, ISRU, Models, RLV:s, Spacecraft, Uncategorized, tagged analytics, ESAS, heavy lift, Koelle, Lunar architecture, Moon, VSE on Sunday 2008.01.27 | No Comments »
Okay, the topic of course is a pun of the current moon exploration approach chosen by NASA. It has been the subject of endless debate, and rightly so, but the various ideas for that are a subject for other days. Bush’s Vision For Space Exploration (VSE), NASA’s 90 day Exploration Systems Architecture Study (ESAS), the resulting [...]
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Posted in Models, RLV:s, Uncategorized, tagged cruise, hypersonic, Slug, transatlantic, v prize, virginia, wallops, X-24C on Wednesday 2008.01.23 | 16 Comments »
The Virginia Spaceport at Wallops (east coast of USA, south from New York) advocates want to create a prize to foster use for the spaceport, and have floated an idea of a “one hour to Europe” style prize, the V Prize, but the rules aren’t yet finalized.
The requirements are quite tough. About 6000 km in [...]
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Jon Goff had an analysis (no equations or numbers though!) of an air-launched reusable SSTO idea, furthermore he promised to look at other reusable orbital launch vehicle ideas in the future. I thought I’d drop a few lines in regards to almost all architectures.
The summary is that big rockets have little drag losses going up [...]
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Michael Tobis, a climate scientist, thinks climate modeling is progressing too slowly and might have even reached a plateau of sorts. There still aren’t very good regional precipitation predictions for example.
And he thinks, far simplified, that the disorganized mess of patching the old fortran codes is the reason - the climatology community should take a [...]
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Posted in Models, RLV:s on Tuesday 2007.10.23 | No Comments »
Made the powered landing analytical solution problem yesterday into a simulink model:
A 1000 kg vehicle coming in at 100 m/s decelerates at 20 m/s^2 in 5 seconds and 250 meters. The impulse needed is 130 000 Ns. (The model becomes unrealistic after 5 seconds since the vehicle starts moving up but the drag still points [...]
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