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#1 Re: Human missions » OSP: Capsule v. Wings - if you had to choose right now » 2003-10-29 05:46:39
#2 Re: Human missions » OSP: Capsule v. Wings - if you had to choose right now » 2003-10-28 18:39:31
Look what I found. This is Boyng?s capsule OSP variant. Looks a bit like Soyuz doesn?t it.
#3 Re: Human missions » OSP: Capsule v. Wings - if you had to choose right now » 2003-10-23 17:11:00
dgagauzov: Re. Your P.S. My nose-up, rocket powered reentry vehicle would take on fuel in LEO, just before the de-orbit burn, with its height-maintaining thrust augmented gradually by aerodynamic lift, until orbital speed has been redduced enough due to aerodynamic braking to start lowering the angle of attack from the stall atitude. I shouldn't think weight of fuel will have any bearing. In fact, excess fuel should be allowed for subsonic cruising flight to a proper (glider) landing strip.
All this is good and well but you?ll have to launch this fuel to LEO anyway so there is no difference whether you carry it with you or refuel in orbit unless you use something different to launch the fuel.
#4 Re: Human missions » OSP: Capsule v. Wings - if you had to choose right now » 2003-10-15 09:24:36
I think that launching the OSP on a Delta IV Heavy will be overkill (it costs $170 million) and anything smaller will not lift lifting body big enough for four people in orbit. The escape system in lifting body is under the craft and cannot be jettisoned when it becomes unnecessary, you have to carry it to orbit and it?s hard to use it as orbit insertion stage because of the different requirements to the trust and duration of burn. I fail to see haw landing in a glider with aerodynamic quality of a brick is safer then landing on a parachute.
P.S. to dicktice - Wouldn?t the weight of the fuel needed for this maneuver be more then the necessary heat shield.
#5 Re: Human missions » Martian Economics - Imports, exports or independence? » 2003-10-13 17:36:31
Of course Mars will have export and import. To colonize Mars you will need a lot of machines that are so complex that it will be impossible to produce them on Mars until the population is at least several million people. So you will have to import them from Earth. To pay for them Mars has to export something that Earth wants or take credit which later to pay with it?s production.
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