PB666

I'm just saying I found about 50 posts in the forums saying that Dres is a very small potato.

Hydrogen would not lower weight, even though its lighter than air, its not lighter than air when pressurized to densities required for storage. You wouldn't use a cryofuel you would use compressed gas and cut the transport distance by a fraction. Imagine a jet plane sitting on a tarmack during bad weather waiting for clearance, and the hydrogen just boiling off.

And currently you also have to report the direction in something that is clear. Current appears to still be minus fifteen.

Elbows!?

Fault notification, missing sign. Valid is -15

Jupiter and Saturn are not in the near manned soace flight future. I think the big question is p(life) and you want your data points unequivicoble. Thats a more important because realistically manned missions into gravity well in deep gravity wells do really offer human anything other than burial plots. Our space goals should be to collect resources as as close to the interplanetary space-time thermodynamic potentials as possible

Jet aircraft have a bigger problem without oil than rockets. In fact the cuurect policies regarding liquid fossil fuels are ludicrous if you want a passnger jet aircraft industry 50 or 60 years out. I dont see a military intested other than a payload delivery system, they can have their choice of several.. With brexit i think that the UK is goin to tie itself closer to canada and the us, which means they can share delivery systems. If they want to develope an X type sustem with the US as a major backer, thats plausible, go it alone i dont see it happening. BTW, this is exactly the type of development systen the UK and other EU sould have been working on from 7 years ago, with an acceleerated developemnt plan, its cost to benefit ratio would have been trivial then, now the ratio is ratcheting now. There are alot of competitors now in commercial space and this will spill over into defense contracts. Had they stimulated these economies properly . . . . . .

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But the banks look for a profit making motive, after the novelty of the concorde wore off it could not survive bad financial time, the banks would expect them to come up with demonstrative commercial viability before they funded such a project, and I don't think its there. If the concorde were truely profitable it would have been redesigned for increased safety, takeoff and landing performance, and efficiency, but with essentially 4 flights, there is not enough demand to justify that. 737 which preceded the concorde is still being produced, even DC3 are still in operation. That is the perspective that I am looking at the SABRE from, is it going to produce something like that, I think not.

If you are counting BAE or RR to do this, they don't have the financial backing or a business model that would garner the investment needed to complete.

I think he is being sarcastic, page 669 is were a line was being built, the part of the active line was edited out of existence, then the next player used two values in one post, IOW total chaos ensued.... thats what he means by getting done.

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Well at least get a modest scale test. http://www.bbc.com/news/science-environment-36773074 I give them thirty years they might have something, bunch of guys syanding around in suits with hands in their pockets. . . . . . . . . . . SR71 is a diiferent kind o bird, they used a buick v8 to start it, the gear was not rated for a full fuel load, and there were more than a few accidents. Sabre is for civilian use.

Cooling is a big problem, you are not talking about pressure based acceleration, where aprt of the energy is stored in the form of potential, its pretty much all driven by thermal motion on the outside opthe core, its all heat, the higher the ISp the hotter it is, the add to that trapping aspect of increasing volume for a bigger engine, and you are in meltdown territory, you coukd increase the size of the engine at the expense of ISP until you are down in SSME territory. The core including the engine an uranium has a relatively high mass fraction, at low ISP most of the energy in the core is simply wasted as heat without any ejecta, once the rection starts heat production is difficult to stop. The most extensive use is for as high as temperature as possible for as long as possoble burning as much fuel as possible to as high as ISP as possible. Burning thorough a launch just does make any sense.

It sells. what if fungi had legs?

Forbidden politics

Banned for caring about memes.

Banned for having an airplaney avatar.

Tea cup

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http://www.bbc.com/earth/story/20160708-the-past-is-not-set-in-stone-so-we-may-be-able-to-change-it

Fate's shadow.

I just have to say that I have been to Bielefeld but i have never been to Dres, so if Bielefeld does not exist, then Dres really must not exist. <---- Great Logic. BTW, Is it true that Dres is a very small potatoe.

http://www.space.com/33374-odds-of-life-emerging-new-equation.html

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