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#676 Re: Human missions » Shuttle Derived to complete ISS? » 2005-07-25 22:13:28

No, the whole basis of this manifest is to launch Shuttle-C from one pad and Shuttle orbiter from the other pad exactly 1 day later. Earth's rotation will bring the launch center under the orbit of ISS in that 1 day. The purpose of this is to use the heavy lift capability of Shuttle-C to carry a lot of cargo with the Arm, maneouvring thrusters and astronauts of the orbiter. That's why I call it a combination flight: part 1 is Shuttle-C, part 2 is the orbiter.

Suspending orbiter operation is not an option because Shuttle-C is dependant upon the orbiter to deploy its cargo. These must work together.

Ok, I got your system now.

First off, get the hardest part out of the way first. Launch the orbiter first. Otherwise we run the risk of launching the C, only to have the Shuttle delayed, leaving the C to a very uncertain fate.

Second, since launching the Shuttle is by far the most delicate part of all this, I'd pack as much into a single launch as possible. Sending the Orbiter first, give it a couple day to do its heat shield scans, and launch the first C. Then send up the second C as soon as possible. Obviously the Shuttle fuel tanks have time limits on them. But I think we can keep it under 5 weeks. Then you could put the Node 3 and US HAB in the Orbiter bay, and possible get it done in two orbiter launches. If Griffen is allowed to take a risk this September, and get the C up in 2 years we can finish the ISS in 2008. 2008. That might even be in time for the final Shuttle mission to be a combination of the SM4/SM5 Hubble service mission. Needlessly expensive maybe, but a PR coup to be sure. Nothing will get the VSE kicked off better than having everyone feeling all warm and fuzzy inside to start out. And perhaps most importantly, that burst of productivity will prove once and for all that we can do great things even with a burocratic white elephant like the Shuttle. Imagine what else we can do.

Finally, there’s no way to get the C operational that quick, no matter what funding it gets. The best way to do it is to complete the return to flight requirements, and dump as much Shuttle funds into the C as possible for a couple years, since the C is no good without the Shuttle, and the Shuttle isn't going to get far without the C.

But overall, I think its a good plan. We can get done a full two years early, and have a decent medium/heavy lifter right out of the VSE gate.

#677 Re: Human missions » Shuttle Derived to complete ISS? » 2005-07-25 20:30:00

Commodore: The launch manifest I listed includes sending an orbiter up with each Shuttle-C, so the orbiter's arm does the work. You don't ever put an expensive arm on an expendable launch vehicle. Assembly will be done by CanadArm on the orbiter together with CanadArm2 on the station.

Operating the Shuttle side by side with the Shuttle-C could very well be prohibtively expensive. You'd definately have to suspend Shuttle ops for the duration of the of developement.

Now if I understand your manifest your launching two Shuttle-C's per orbiter flight. Thats quite taxing on the pad and recovery teams. Thats 6 SRBs, three ETs, and a very quick scrub down of one pad. I'd spread that out more, maybe one ripple fire every 6 months. Also, are you planning on putting anything in the Orbiter bay?

#678 Re: Science, Technology, and Astronomy » New bonetissue grown on demand » 2005-07-25 19:31:40

You got to make your thread titles more descriptive.  wink

#679 Re: Human missions » Spacesuits - personal spaceship » 2005-07-25 19:25:22

http://www.newscientistspace.com/articl … .html]NASA throws down the gauntlet to glove designers

I saw this, and said "Dear God tell he made that head line up".

No such luck.  big_smile

#680 Re: Human missions » Shuttle Derived to complete ISS? » 2005-07-25 19:18:06

::Edit:: And why would it take multiple years to develop a Shuttle-C with the exact same engines, exact same performance, and almost exact same tortional stress as the Space shuttle orbiter? Aerodynamics will be a bit different due to lack of wings or tail, but it wouldn't require redesigning the ET. As Mike Griffin said, the orbiter is an extremely heavy fairing. If you replace that fairing with a light one, why would it take multiple years?

You have to internally support all the pieces like the Shuttle would.

#681 Re: Human missions » Shuttle Derived to complete ISS? » 2005-07-25 19:13:21

IF, and this is a big if, they were to halt STS ops at the end of the year, keeping Endeavour prepped as much as possible (to keep the senators who demand manned flight capability happy) then we might have the funds to develop the shuttle-c and a CEV, maybe without that special expenditure, which would go over Congress like a lead balloon.

Now if started today it would take at least two years to get operational. And there are other issues. Among them is the fact that the Station was designed to be built from the Shuttle. Pieces would be lifted out of the bay by the CanadArm, crews would work from them, ect. At least one Shuttle-C would have to have its own arm. And that’s assuming that there’s a way save it. Plus we’re going to have to develop a way to control it, preferably from the station. If not, we’ll have to have put some sort of cockpit on the first one. Hopefully in that case we can save the cockpit, and dock later cargo pods with it.

Another issue is crew launch. Without the Shuttle, the only thing we have is Soyuz. And that’s only 3 people. I don't know how many people it takes to do the construction ops. So you have to launch 2 Soyuz. Which were going to have to pay for. And somehow launch very quickly. Which means Congress will have to clear up that thing with Iran. Unless of course Russia can pull a Kliper out of its butt. Come to think of it, the Ruskies would be pretty pissed at having to continue to launch crews all by themselves over the course of Shuttle-C development. Perhaps in the spirit of international cooperation NASA and the ESA can help the Russians jumpstart the Kliper.  God knows the Russians can light a fire under its engineers. Literally. Of course for all I know the combination of the 2 man Station crew and a single 3 man Soyuz crew would be enough.

In any event, it would be preferable to spend all this money were spending on the Shuttle on something that hasn't already been earmarked for the Smithsonian. The Shuttle-C a great start as far heavy lift in concerned, and developing it now gives us a jumpstart for the VSE. The Inline option is better, but we won't be starting that until after 2010 anyway. And who's to say we'll want to use the inline option every time anyway.

#682 Re: Human missions » MANNED MISSION TO TITAN BY 2040!!!! » 2005-07-24 21:13:40

"If we have the closed loop life support, the agriculture, and propulsion in place for a Mars mission, theres no good reason we can't go to Titan. Its a matter of a few more "are we there yet's"

I disagree, you can't keep a crew bottled up in a ship for multiple years, artifical gravity or no. Their mental health would deteriorate and that would hurt them just as surely as radiation-induced cancer. Speed is nessesarry, we have to be able to get to Titan in a timely fasion.

While we should certainly provide them with all the speed we can provide, I don't believe we should limit our desitinations to "day trips". Theres going to be points when our life support capabilites Out reach out propulsion capabilities forcing explorers to make treks of multiple years, and theres no reason we shouldn't let them. It might mean making use of different measures to ease the trip, such as building larger ships, with more personal space, with larger crews, with "families", and eventually with "ports of call", such as they are.

But we can't be afraid of long trips. We just have to make then cozier.

#683 Re: Space Policy » Chinese Space Program? - What if they get there first » 2005-07-24 20:17:25

China won't be going to Mars anytime soon for too reasons...

1) Its a hell of a lot of money to spend for no forseeable financial gain
2) Its a surefire way to get the place swarming with Americans

The moon could be an issue if China continues on its current rate of economic growth. But I think just about everyone agrees its unsustainable for any number of reasons.

Quite frankly China wants Tiawan more than it wants the Moon or Mars. And its not going to get it under the current regime.

#684 Re: Human missions » MANNED MISSION TO TITAN BY 2040!!!! » 2005-07-23 22:15:13

If we have the closed loop life support, the agriculture, and propulsion in place for a Mars mission, theres no good reason we can't go to Titan. Its a matter of a few more "are we there yet's".

Extra challenges include a possible gravity assist by Jupiter, which will mean major radiation exposure (Saturn has quite a bit too).

And of course the surface itself and atmosphere itself. Its so freaking cold! Any Rover will require a reactor just to keep warm, and I can't imagine the space suits.

That said, I'm sure we'll be there by the end of century or shortly there after. It probably won't be my first for landing in the Saturn system. It's the biggest gravity well, but I'm not sure theres much of anything usefull there. Its thick atmosphere does provide ample radiation protection for human habitation however.

#685 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-18 21:43:20

On Wednesday while they were booting up the 4 redundant main computers, the NASA TV people were saying that each computer did its own calculation and then compared notes. The majority could vote out a bad result.

Why can't we do this with sensors? We know darn well when the tank gets empty. When the one gives a bad reading, the others should be able to tell it the shut up.

#686 Re: Science, Technology, and Astronomy » Shields UP! - Star Trek Like Shields » 2005-07-18 21:31:16

http://space.com/businesstechnology/tec … conducting Magnetic Bubble May Protect Astronauts From Radiation

Just thought I'd through that in there.

#687 Re: Science, Technology, and Astronomy » DoE:  Star Trek-style "Phasers" » 2005-07-17 18:54:10

Ouch sounds painful. Wouldn't it be better morally just to use a high powered tranquilizer gun. Then it would be hard for these to be misused. After all, how do you torment a sleeping criminal?

Not fast enough. Someone can do a lot of damage before the stuff circulates through the blood stream.

#688 Re: Not So Free Chat » What Are You Doing? » 2005-07-15 17:37:02

Posting on an internet message board.

#689 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-15 16:18:24

Hey, anytime we can get the people who control the pursestrings interested in space seems worth it to me.

#690 Re: Human missions » Early retirement for orbiter? » 2005-07-14 21:01:23

One pad at LC-39 is plenty to support 4 or 5 shuttle flights per year.

Just thought I'd add that we now not only have 1 shuttle prepped and launched, but another one on deck to launch within two weeks  for a rescue mission. Just how much work needs to be done to a pab after each launch to get it ready?

Although after this week they might just be better off cramming 9 people into a Soyuz.  roll

#691 Re: Human missions » Early retirement for orbiter? » 2005-07-13 21:28:22

Griffin wants SRB and SDV, that mean he will be inclined to choose Lockheed because they cannot cut mass like a capsule design can. Griffin will choose Lockheed because it will justify SRB and SDV development.

Want to bet? If not you, Bill?  big_smile

I really don't think Griffen will limit himself like that.

With a EELV, we could in theory do a "quick and dirty" Capsule CEV with legs that would do a direct shot, short duration mission that would be perform pure local science, and allow us to cover a couple dozen sites in a few years.

Mixing and matching is the key.

#692 Re: Human missions » Split Up NASA? - Separate Agency For Each Destination? » 2005-07-13 20:53:36

http://www.space.com/adastra/adastra_as … .html]NASA must Establish the Moon and Mars Astronaut Corps

Sure, a dedicated PR team and cheerleading squad would be helpful, but if were going to do that we should go a step furthur, to reorganize the agency to provide a balanced view of the solar system. First off the Air Force should take over the Aeronautics portion of  NASA. An F-18 that flaps its wings does nothing for space exploration. Too bad we already have an NSA, cause we can't confuse the post office. Even the Earth observation missions could be taken over by the national weather service or NOAA or USGS.

But I think if we organize the agency around destinations, it would force each group to create a more unified and thought out strategy for what should be accomplished at each place.

#693 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-13 18:21:31

If NASA has to cancel the launch for every single detail, especially ones about redundant systems, then they'll never get off the ground at this rate. Does not bode well for SDV either.

If its just one faulty gauge out of 4, in theory they probably just need to swap out that gauge.

Of course that could mean removing and reinstalling loads of equipment, requiring hundreds of checkouts...........

Out of curiousity is there any reason why they couldn't have countinued all the way up the checklist before aborting. Then they could have caught any other issues that may be lurking.

#694 Re: Human missions » Early retirement for orbiter? » 2005-07-13 17:20:21

Depends on the flight rate. If NASA can only manage three or four flights a year with all three orbiters, then they will need all of them for about all the time between now and 2010. If NASA can get back up to like five flights a year, then early retirement is possible.

That would mean a turn around rate that the Shuttles have never achieved. With 2 shuttles they'd have do 2-3 missions per shuttle per year.

#695 Re: Human missions » Early retirement for orbiter? » 2005-07-13 16:35:03

They can't finish the ISS with two shuttles.

#696 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-13 14:28:03

Turns out its NUMBER #2 sensor out of 4 that’s malfunctioning. They are draining the fuel out of the ET to address the issue. The flaw is being described as similar to the problems that scrubbed the May launch.

Sources say the earliest possible launch is now Monday.

#697 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-13 11:47:51

Next launch window is tommorrow at 3:24pm ET.

#698 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-13 11:46:34

But it won't.

Launch scrubbed for today due to failure of 2 of 4 of the LH2 cutoff sensors, which cut the engines when fuel gets low.

I guess this has happened before, so its nothing they can't deal with.

#699 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-12 21:18:32

Man, that window cover falling off the orbiter and breaking the OMS pod cover ... thats like a bad omen or something.

Yeah, I can just picture everyone in mission control smacking their foreheads all at once.

#700 Re: Human missions » STS-114 Mission Coverage and Discussion » 2005-07-12 20:50:09

Despite the issues inherent with the Shuttle and the fact that it and its mission has gained lame duck status, its still exciting that were finally getting off the pad again. I hope that the efforts over the next few years will give us the confidence and momentum to fully implement the VSE.

http://www.nasa.gov/returntoflight/main … tro=1]NASA Return to Flight
http://www.space.com/returntoflight/]STS-114 Mission Coverage

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