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#652 Re: Not So Free Chat » U.S. Culture - ...where's it going? » 2005-06-14 10:52:09

About those Pistons, many years ago when Jordan and company battled Lambore and company First Chicago Bank ran an ad campaign against NBD Bank.

"Why would you bank with Pistons fans?"

Now? The've merged.

#653 Re: Not So Free Chat » U.S. Culture - ...where's it going? » 2005-06-14 10:46:59

Words are slippery things.

For example, for Reagan to campaign on "states rights" in Selma Alabama, that's just secret code for relaxing protections for blacks.

"Sure its wrong to lynch blacks we ALL know that. Ooops the sheriff just lost the evidence. Sooo sorry about that but we gotta let these good ole' boys go. . ." 

Wink, wink, nod, nod etc. . .

= = =

Cigarettes CAUSE cancer? Well golly-gee EVERYONE knows that!

And no we didn't LIE under OATH when we told Congress there was no credible scientific evidence cigarettes cause cancer.

big_smile



Edited By BWhite on 1118767739

#654 Re: Not So Free Chat » U.S. Culture - ...where's it going? » 2005-06-14 10:36:38

Hate crime laws were enacted to empower these groups and to demonstrate that society at large would not accept those who actively seek and target minorities to victimize.

Here we go. . .
Laws aren't supposed to "empower" people. They just make clear to all that defined crimes against them result in defined punishments.

We could just as easily change the requirements and level of evidence necessary to charge someone with a hate crime as we could undo the entire legal edifice.

Hate crime laws are very recent additions by and large. Dumping them is hardly undoing the entire legal edifice. No more so than repealing Campaign Finance Reform, the PATRIOT Act or changing a speed limit.

Its very much like "affirmative action" legislation.

For now, lets just say I can predict my future posts and Cobra's future posts as if they were forced chess moves in a problem.

Been there, done that. Neither he nor I will persuade the other.

Now, how about 'dem Pistons?

  :;):  tongue

#655 Re: Not So Free Chat » U.S. Culture - ...where's it going? » 2005-06-14 10:33:16

"Hate crime" legislation is like RICO - - it targets people who target groups rather than random individuals.

=IF= racism, sexism and homophobia were to be eradicated from our society =THEN= I would agree with Cobra and say hate crimes  are not rational. But since I believe certain minorities are at a significant disadvantage in terms of power, I agree with clark that "hate crime" legislation does accomplish valid societal purposes.

#656 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 19:51:06

Revisions to http://www.spacedaily.com/2005/05061311 … 3.html]ISS completion plans due out later this summer.



Edited By BWhite on 1118713876

#657 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 15:39:56

http://www.spaceref.com/news/viewpr.htm … 105]Boeing, Lockheed & Grumman except for t/Space (and I do understand they lack ANY proven experience and have a difference of opinion about the intellectual property arising from the project) who missed the cut?

#658 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 14:55:49

Lockheed CEV design has won preliminary approval as one of the contractors? HA!  :laugh:

An announcement http://www.nasawatch.com/archives/2005/ … en.html]of an announcement?

Someone has to build the CEV and the upper stage no matter what. Thiokol don't make spaceships, just boosters.



Edited By BWhite on 1118696232

#659 Re: Science, Technology, and Astronomy » Solar thermal power - Fathers Day gift » 2005-06-13 11:17:47

Oh, BTW, before anybody asks, I did write "solar thermal powerplants can operate at night".  Solar thermal powerplants need the heat, not the light.  Anything that will release heat back to the generator will keep it running at night. 

A ton of molten lithium can soak up enough heat during the day to keep a kilowatt generator going for hours after dark.

Build a solar chimney in a desert region and supplement with solar thermal powered Sterling-engines using a liquid metal heat sink as you propose. Put the heat sink underneath the outer umbrella of the chimney and heat with reflected sunlight harvested from even farther out.

Some of the heat not captured by the Sterlings can be captured by the chimney.

Kinda like a turbo-charger to prime the pump and accelerate air flow up the chimney.

#660 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 11:09:19

There will be sufficient launches over the long term. The “pay as you go” approach favors launching what we can, when we can- not the “here is a billion dollars, launch the big bird”. Testing alone of spiral one (and then ISS taxi duty) will be several dozen launches by the end of the decade.

By analogy, to taxi an aircraft at 80% of takeoff speed accomplishes nothing. "Sorry sir, we reached 80% of takeoff speed and ran out of money."

If "go as you pay" doesn't get us anything except more flags and footprints, the money is 100% wasted. If you can't afford the tip don't order the meal. The mission, in my opinion is to return to the Moon, and this time "we stay" withe the Moon, Mars and elsehere being assimilated into a permanent sphere of human presence and activity.

We SHOULD NOT embark on "go as we can pay" unless we know we can afford to pay enough to do something useful, other than subsidise AIr Force buying Delta IV. My cynical fear is that we will "pretend" to have a civilian space program while using NASA money to support Defense Department needs. 

And I believe EELV cannot sortie enough mass fast enough and (cheaply enough) to do anything useful on the civilian side of the space exploration equation.

=IF= we cannot get SDV costs down, then our current budget at $16 billion is simply insufficient to accomplish meaningful space exploraion. Perhaps that is true.

I believe Michael Griffin knows this and does not intend to supervise a NASA that accelerates to 80% of take off speed and then runs out of fuel.

= = =

But remember the narcissim of petty differences -  - powerless people arguing over tiny points.

I would like to hear a complete transcript of the Rumsfeld - Griffin conversation, though.

#661 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 09:19:40

Use Zenit? Zenit's track reccord is not that great, its upper stage Isp is low, and most of all it isn't built here. Thats a silly question Bill. Give Russia veto power over VSE? Yeah, thats lovely... and certainly not worth the money.

We can build RD-180 here, RD-170 isn't but a pair of 180's glued together.

Rhetorical questions need not always be answered.  :;):

= = =

Why do we believe there will be sufficent launches to support BOTH Atlas V and Delta IV? Will we pay to upgrade both Pad 37 and LC 41 to support a hypothetical desire for redundancy?

#662 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 09:02:28

http://www.thespacereview.com/article/392/1]This is interesting:

Roger Launius, former NASA Chief Historian and now with the National Air and Space Museum, described how Houbolt’s approach in 1961–1962 was the kind of thinking that is needed today: “In many ways, the lunar mode decision was an example of heterogeneous engineering, a process that recognizes that technological issues are also simultaneously organizational, economic, social, and political,” he wrote. “Various interests often clash in the decision-making process as difficult calculations have to be made and decisions taken.”

Since that is an accurate description of the current state of NASA efforts to plot its future paths through space, it is sobering to realize that many historians argue that without the Houbolt-led push for LOR almost half a century ago, the entire manned lunar landing program might never have succeeded. And without somebody taking on the Houboltian mantle today and bringing sanity to the current planning chaos, the prospects of a successful human breakout from near-Earth space remain dubious at best.

The question may be whether Michael Griffin can be the Houbolt of this current vision-quest.

#663 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 08:56:06

Any bet should be carefully defined.

The ability to fly CEV on Delta & Atlas as well as Thiokol is not a bad thing and might actually happen. Griffin may also find a way to squeeze a stick CEV into the ISS / STS funding AND continue EELV CEV development.

#664 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 08:24:25

http://space.com/spacenews/businessmond … .html]News, from outside the circle.  :;):

U.S. Defense Secretary Donald Rumsfeld and NASA Administrator Mike Griffin are expected to meet toward the end of June and Washington sources say the agenda is devoted to that very issue.

Heh! To be a fly at that meeting. . .

= = =

http://planetary.org/news/2005/garver_r … ml]Griffin appears to have bi-partisan supporters, so it may boild down to how much political capital the Administration wishes to spend to support Rumsfeld and Boeing. 

Michoud is a Lockheed facility, right? They win either way except for an all Delta program.



Edited By BWhite on 1118673080

#665 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 08:20:05

EELV automatically means there are two launch vehicle families to execute VSE. It means flexibility. 200 million a shot is a better deal than 2-3 years of a stalled multi-billion dollar program on a tight deadline. What was the old NASA saying…oh yes, “failure is not an option.” Don’t build “failure” points into the program.

Are you certain the DoD plan to downselect to Atlas OR Delta is officially dead?

We also need to factor in and amortize the costs of upgrading BOTH Pad 37 for Delta and LC 41 for Atlas to support human crews. Not cheap, that. VAB can support both Pad 39A and Pad 39B.

If EELV is the CEV choice and Pad 39 is scrapped, what if DoD decides its doesn't need or want EELV any more?  An already overpriced rocket becames staggeringly expensive.

EELV plus a mythical future clean sheet booster ties our hands more than anything, in my opinion, because (among other things) future budget deficits will alwasy make new programs more difficult to fund than ongoong ones.

= = =

Since Atlas uses Russian engines already, why not just buy Zenit? If Russian stuff is "off the table" why is Atlas on the table?

= = =

How soon can EELV CEV fly? Especially if Admiral Steidle's preparations are undone?

By late July we should know more.

If the human structures for a EELV CEV "fly-off' are scrapped (and all the people reassigned or let go) EELV CEV will be dead for the foreseeable future.

#666 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 07:32:38

Engineering aside, one political danger of shutting down shuttle and delaying crewed CEV until 2014 to leave a 4 year gap in US human spaceflight is that the politicians may learn to live with the idea that we cannot send men into space.

Come 2012 a decision to postpone CEV would be easier to swallow if CEV remained non-operational.

= = =

t/Space of course solves all these problems and at $500 million seems a "hedge bet" even/especially if the stick CEV is pursued.

#667 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-13 07:25:47

Cheerleaders for the “stick” and SDV, please explain how embracing the single point of failure system for CEV is better. Maybe from an engineering standpoint, there is a great deal of value, but as time has shown, it takes more than engineering to get to the Moon- or Mars.

First, the RSRM has been used over 200 times with only one failure and not reading the manual (weather too cold) was a big part of that, and that defect has been corrected.

Second, design the uppermost stage to fit on either the Thiokol booster, Delta, or Atlas.

Third, I do favor t/Space over the Stick which I favor over EELV.

= = =

If the Stick is $100 M per shot and EELV $200 M per shot which do you prefer:  5 sticks plus t/Space funding or 5 EELV and no t/Space funding?

Which option gives greater future flexibilty?



Edited By BWhite on 1118669193

#668 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-12 22:08:39

GregM, what is your per flight cost estimate for the Stick?

= = =

In my opinion, the bigger developmental issue for such a vehicle would be the man rating for the second stage. It would be this stage that would be doing the bulk of the flying – likely burning for up to 8 or 10 minutes, depending on the launch profile.

But this is true for any CEV system since the US has no man-rated 2nd stages whatsoever, correct?



Edited By BWhite on 1118635896

#669 Re: Human missions » How to blanket the Moon - with recon-sats » 2005-06-12 09:23:14

Mapping the Moon is a good idea, but it is probobly better to put a single broad-spectrum imager in Lunar polar orbit rather then bother with the mission complexity of dozens of little satelites with short lifespans, slow transmission rates, and too-small cameras. The size of your lens determines your resolution to a signifigant degree you know.

Okay, now that is a good point.   :;):

One big camera that covers the Moon over time, gotcha, that is better.

#670 Re: Human missions » Shuttle derived revival - Space.com » 2005-06-12 00:23:18

Amen to that MGS... Thats why I am wary about the whole SDV concept, that NASA won't be able to resist stretching the limits of "retaining key, nessesarry personell..." And so the decision should be renderd moot by eliminating all of them unless Griffin can prove he can make it happen.

The http://www.planetary.org/aimformars/stu … ]Planetary Society Report does call for shifting the burden of lifting an unspecified number of ISS heavy modules to foreign launchers.

See page 5 of pdf

= = =

How could I have forgotten this? tongue

Pages 6-8 talk about using SDV HLLV to finish ISS.



Edited By BWhite on 1118557547

#671 Re: Human missions » Mars Colonization Program - Mission 1: Your Comments? » 2005-06-12 00:19:15

Regarding low-energy access to the Earth-moon L1 point: there is no low-energy access. In fact, it probably takes slightly more energy to go to L1 from low Earth orbit and stay there than it does to escape the Earth. L1 "orbits" the earth at about 2,000 mph/3,000 kmph. If one flies through it, one can't stay at it. It may be possible to fly to the moon, use lunar gravity to boost one into an orbit that oscillates between the moon and L1, then two weeks later when one is flying through L1 perform a small delta-v to stay there. L1 and the moon orbit the Earth at essentially the same speed. Going to L1 from Earth takes, I think, an extra 300 or 600 meters per second compared to escape velocity (but I don't remember where I saw the figure).

Weak stability boundaries connect EML1 to the other EM lagrange points and the Earth-Sun Lagrange points. For a low delta-v one can move among those points (though the travel time is usually months at minimum). But to go to the Mars-Sun lagrange points requires about the same amount of delta-v as traveling between the planets normally takes.

         -- RobS

I have located an AIAA paper that asserts that lunar encounters (fly-bys) do lower the total delta v needed for travel from LEO to EML1.

As alwasy, its time versus fuel.

#672 Re: Human missions » Breaking news? - Admiral Steidle resigns » 2005-06-11 23:14:50

Who is Robert?

Any how, NASA astronaut Scott Horowitz claims to have run the performance numbers of the SRB on his computer and found that, in his words, it would be “a hell of a ride.” The SRBs burn out after just over two minutes, and although powerful, a single SRB doesn’t have enough performance alone to put a manned spacecraft into orbit. At burnout “you’re going about Mach 18 and pulling about TWENTY g’s,” he said. So much for man-rating the SRB's!

(I assume that a man-rating assumes that a man inside would actually survive the trip to LEO--but I could be mistaken about that little detail. Maybe someone could set me straight on that!)

In addition, turning the SRB into a launch vehicle requires an upper stage.

Despite the discussion within NASA and elsewhere about using the SRB to launch the CEV, it’s not clear whether there’s sufficient momentum behind the idea to at least allow further studies, let alone selection of the concept for development. ATK Thiokol is strongly behind the idea because it gives new life for the SRB—a significant portion of their business—once the shuttle is retired around the end of the decade(Thiokol is behind this absurd concept, Oh there's a surprise!).

There are other technical issues that a SRB-derived launch system would have to address, notably the development of a new upper stage. However, in the long run the bigger challenges that an SRB-based launcher might have to face are perceptions: that the SRB is an old technology, best left to the past; that solid-propellant motors like the SRB, which can’t be turned off once ignited, are unsuited for manned spaceflight applications. All of this equals more billions spent and more years of delay for a CEV. I guess I'm answering my own question!

http://www.geocities.com/launchreport/weblog.html]Link

As for momentum, the idea of an upper stage on an SRB was strongly touted by the Planetary Society report released in July 2004. Michael Griffin was the co-leader of the team that prepared that report.

#673 Re: Not So Free Chat » Political Potpourri VI - (We crashed the last one) » 2005-06-11 22:28:39

New official http://www.washingtonpost.com/wp-dyn/co … ml]British memo:

A briefing paper prepared for British Prime Minister Tony Blair and his top advisers eight months before the U.S.-led invasion of Iraq concluded that the U.S. military was not preparing adequately for what the British memo predicted would be a "protracted and costly" postwar occupation of that country.

The eight-page memo, written in advance of a July 23, 2002, Downing Street meeting on Iraq, provides new insights into how senior British officials saw a Bush administration decision to go to war as inevitable, and realized more clearly than their American counterparts the potential for the post-invasion instability that continues to plague Iraq.

We went in too light - - not enough soldiers to establish and maintain security.



Edited By BWhite on 1118550579

#674 Re: Human missions » How to blanket the Moon - with recon-sats » 2005-06-11 17:01:01

Map making and surveying is a necessary precursor to ownership. Despite my apparent leftie tendencies, I believe significant private property ownership on the moon would be a very good thing.

It all depends on how those rights are divvied up.  :;):

#675 Re: Human missions » How to blanket the Moon - with recon-sats » 2005-06-11 16:14:16

Make maps.

After all, PGMs are the only short term economically viable reason for going to the moon. Lunar PGMs - - if they exist - - will be found in astroblemes, craters left by Ni-Fe asteroid strikes.

A detailed high resolution lunar map would allow researchers to narrow down the best places to look.

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