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Wow, totally off topic, but I've been gone with school and research for the past few weeks more or less, I finally get a chance to dive back into my boards, and this thread is still going!
</insert energizer bunny>
I'm going to offer a contrary prediction, Oil will hit 15 year low by this time next year. Siberian oil will start to hit the US market in a big way in the next year along with hopfully oil from the California coast and the Gulf of Mexico. Also its very likley that tar sands and oil shale extraction will come online soon after their false start in the late 70s.
I know that there has been alot of work done at Johnson Space center at extracting oxygen from lunar regolith, but I was wondering if anyone had looked at extracting aluminum as a fuel so that you could produce both componets locally.
Could you cast a hallow aluminum core and use it as a hybrid motor with liquid oxygen, or prehaps a rocket engine that blows hyper-fine aluminum dust into the combustion chamber along with liquid oxygen.
/shudder/
Although H2M in 96 would have been nice, it's way way too 'cumbaya' for me.
lol, you'd think the readers of the KSR series would be lear of anything with the the phrases UN and Mars in them.
Yes I do know... they have paraded their tiny dinky rocket around for almost a year, and still haven't launched it... So what if they got a USAF contract or two? The USAF has Boeing/LM wraped around their little finger and could launch all of them on a Delta... I don't see the contracts as much more than tacit, passing "if he can, great" support.
And now, using the little home made rocket engines, he wants to cluster them together plus use RL-10's to make a rocket thats almost as powerful as the Delta-II. Clustering engines is a sure sign that Elon's technology has reached the edge of its performance and can go no further. The Soviet Moon rocket with its 30 first stage engines ought to be clear enough proof of the stupidity of scaling up small rocket technology too far.
And Elon is supposed to come up with a super engine, far more powerful? And build rocket stages dozens of times larger? No no... he will be lucky to even make the Falcon-VB fly.
This time, market forces are not enough to overcome the sheer magnetude of the investment required to develop such a huge vehicle.,
I wasn't implying that they would develop and HLV of on their own since I don't see there being many customers outside of NASA and the DOD, but if NASA is requestin bids on developing a new launcher the I just think the SpaceX makes sense.
One of the big problems I see in MC fusion propulsion is that they all hearken back to the 'Mirror Machine' arrangement favored by the Princeton plasma physics lab in the 60s and 70s. The geometry makes allot of sense for a rocket engine but because of the boundary layer turbulence that the inline configuration and circulation of plasma causes it is amazingly hard to get the confinement times needed for ignition. That is why the focus has been on IC fusion (EG the National Ignition Facility) Pulse fusion (EG the Z machine at Lawrence Livermore [I think]) and Tokomaks (EG the ALCOR at MIT or the JET in the United Kingdom)
In any event we all these technologies are between 5 and 15 years away from implementation for power plants on the ground so it's anyone’s bet whether they will ever be light enough for ground launch. The important use of these technologies will be in space propulsion and power generation on the surface of the moon and Mars. The moon and gas giants have He3 and Mars has deuterium, voila. (Deuterium/Tritium fusion doesn't make economic sense, the free neutron issue aside)
In the really long term I would guess that there will be craft that are fusion powered can take off and land on the surface and make the Earth/Mars 'milk run' in three of four days, but they will have to be based on materials science and a understanding of plasma physics that we can't even begin to approximate currently.
We can maintain military supremacy for decades. But then the payback against my grandchildren will be fearsome.
And I seek to avoid that result.
The world is ours for the taking, and we don't. We've never used our power accept for altruism, that says allot about our national character.
Until now. That is my beef with GWB.
That's a thread onto itself, lol, and I don't think this is the forum to do it, I have enough debates on the liberation of Iraq in meat space, lol.
Also I would say that this is the begining of the American Epoch, not the end, we will fall one day, but it will be to our own progenity in the form or one of our by the off world colonies most likley. I'd suggest reading the book 'The Future of War' it provides the best explanation of why I have read so far, I've done alot of reading on the matter, but that is the book that provides the best summation.
You think the 20th was the American Century, your going to love the 21st.
I agree that Zubrins biggest effect has been one of organization and credibility. I would say it is because of him more then anyone else that we can talk about H2M with out (at least no too much) laughing in the backround.
As far as the BSI (speeking of, what are we calling it, the Bush Space Initive? the Moon Mars Initiive? Opperation why the Hell not?, lol) I don't see why Moon/Mars are necessarily first one then the other. It seems like they are alike and different enough to run the program in Paralell. Once you get the building block of heavy lift launch vehicles, inflatable habitiats and nuclear reactors it's like a lego set, you need very few specific parts for either set. In the case of Mars you need to develop aerobrakes for decelloration and orbital insertion and a ISRU plant. On the moon you would need a different ISRU plant to extract oxygen and aluminum from the regolith and possible a system to extract ice from the south pole. You might be able to get away with using the same 'landing bus' assembly with the same leggs and rockets on both the moon and mars, just on mars it goes in a aeroshell and has parachutes as well.
In either event I think a big enabler will be the increased cost effectiveness of the new space start ups. You get Bigelow building the habs and if you give SpaceX the contract for a 120-140mt booster you'll be getting alot more bang from your buck compared to LockMart or Boieing. Hell, just switch over to true bidding and not cost plus and I would say we can do Lunar and Martian missions simultaniously without a problem.
While I do appreciate that a strong military can come in handy, it seems like we could reduce the military by at least 1/3 and still be able to project overwhelming power throughout the world.
PurduesUSAFguy made some good points in response to this, but missed probably the most basic one.
If I attack you with a knife, would you rather fight back with two knives... or an automatic rifle from an armored vehicle with fifty guys and a helicopter backing you up? It's always prudent to have the greatest advantage possible, willfully reducing your capability in the face of any threat is foolish and irresponsible.
All the high tech weapons in the world will not stop the demographic bomb we are facing.
We need to figure out how to defuse global resentment (whether justified or not) because if our answer is to put our boot on peoples throats there will be hell to pay when we get pulled down.
And if we number 300 million in a world of 6 billion, we won't have enough boots to do the job.
We are 300 million against 5.7 billion. Even in that situation we win.
No other nation has a Navy, Air Lift, or Bombing force capable of mounting an offensive against the US. The countries we share a border with could be felled in a matter of days, the Canadian military is functionally equivalent to the Coast Guard (No offense to Canada, I Lived in Kingston, Ontario for two years and enjoyed it so much we still have a summer house there) and the Mexican military is, well...you get the picture.
As far as being concerned by nuclear or other long range strike, I think I said this in another thread but we have a tremendous advantage in that arena in that we have the best sensing and intelligence so we can hit the their birds on the ground. A first strike by tridents fired from the North Atlantic, Artic Circle, and Sea of Japan would allow only between 3 and 8 minutes of warning, not enough to initiate a response. (The fastest Russian response time in training during the peak of the cold war was 19 minutes decision to launch) A second strike followed up 10-20 minutes after the first warheads hit would take out leadership and conventional forces and leadership targets while a final third wave if need be would hit within 4-5 hours to take out Urban-Industrial targets if the enemy had not yet capitulated.
The world is ours for the taking, and we don't. We've never used our power accept for altruism, that says allot about our national character.
The one thing I don't like is people pointing to the DOD budget and saying "OMG the military is spending
so much, we should use all that money for X program"The DOD is an enabler, if we don't maintain and continue to expand our military dominance we won't be able to ensure our security and we will be increasingly vulnerable to subversion by the rest of the world. Also without the unquestionable insurmountable threat of the American Military Machine it will be very hard to insure the free flow of important raw materials. (eg Oil)
First and foremost the DOD should be A.) Funded to the highest possible extent and B.) Be given carte blanche on procurement and tactics. IE if they think they need a system be free to procure it, not forced to go through the needless process of congressional approval from people who do not understand what they are making policy on. C.) Be free to get rid of cost-plus.
Where is the threat that makes us need all of this excessively overwhelming might? We could cut military spending by 80% and we would still be spending more than any other country. Our navy has 4/5 of all of the world's carrier aircraft, and it could probably defeat all of the world's other navies combined. We also have close to half the world's nuclear weapons, and the means to deliver them to anywhere in the world with no warning. We also have more military satellites than the rest of the world combined. We have a large variety of methods short of war to convince other countries to do what we want, and most of the other counties with powerful militaries are allies of the US.
While I do appreciate that a strong military can come in handy, it seems like we could reduce the military by at least 1/3 and still be able to project overwhelming power throughout the world.
In the current world most of what you say is perfectly accurate. The problem is that the world is a very dangerous place that is far from static. Let us not forget that Germany went from being a bombed out shattered nation to a juggernaut in less the ten years and nearly conquered the western world. The reason we have to maintain our might as you put it is that it takes decades year between concept and production of new systems and, so we have to be preparing for the wars we will be fighting in the 2010s and 2020s.
For example the Air Force is in the ‘perfect storm’ of procurement right now since many of our front line systems are reaching the end of their effective design cycles and their replacements were either cut back significantly or canceled altogether. The F-15 was designed in the 70s, and the F-16 is rapidly becoming yestertech. Our bomber and tanker forces are horrible antiquidated with the exception of the B-2 which was cut to such a small production run as much as a silver bullet as it is still doesn’t really keep our capability. In retrospect we would have been better off just ordering 300 B-1bs in the 80s instead of splitting bomber procurement to both the B-1 and then ATB program. Or if you go back even deeper if we had followed through with the brilliant program that was the XB-70. Toss in the 50 year old fleet of KC-10 and KC-135s we desperately need a replacement for…well you get the picture. The good news the USAF has an out in Space based systems and UCAVs which are coming online faster and cheaper then ever expected. The navy on the other had is screwed without a great answer
Also on the subject of the Navy they are in a serious pickle right now since during the mid-90s (not pointing any fingers
)there was a serious cut in the funding and slow down in the ordering of new ships so our fleet is reaching retirement age over twice as fast as new ships are becoming operational, so we are in the position of trying desperately to try and get more ships out there faster with less people. The good folks at Electric Boat have come up with some really good ideas like the fully automated weapons handling system for the next LA class attack boat upgrade and the Virginia class is being built modularly so that hopefully they can be produced faster then both the LA and Seawolf classes were. Also the reactivation and refit of Ohio Class SLBM subs are massive cruise missile carriers (essentially the arsenal ship concept from a few years ago) will serve as a huge force multiplier since it offers carrier like strike capability with a huge amount of flexibility without having to deal with putting an immensely valuable asset like a CVN at risk.. It will be interesting to see how the DD(X) turns out especially since they will be all electric and possible nuclear powered.
Manned exploration of space is not important as exploration of space itself, for Christ sake don't vote for the man because he's got a bold exploration vision, given the choice between Caeser with exploration of the East and Jesus Christ and the establishment of peace, which would you choose?
OMG, that is the most fundamentally flaw comparison I've ever heard.
I would say a much more applicable metaphor would be the difference between Neville Chamberlain and Winston Churchill, one man committed to avoiding war at all costs, the other understanding that there are things worth waging war for.
In any event I am slowly moving from seeing Kerry as a minor annoyance if elected to a complete disaster on every level.
As much as I think more funds should be devoted to space, NASA gets three times as much money as the National Science Foundation, 115 times as much as the endowment for the arts and 99 times the amount given to the national endowment for the humanities. I can see why leaders talk about funding other scientific and engineering initiatives. ). To help put it in better perspective it is 0.23 times the amount spent on enducation.
P.S. Why does bush hike in long pants and a shirt?
I would agree with you that we need to fund the national labs significantly more then they are, we need more big projects like the National Ignition Facility and a new larger accelorator facility, but this funding shouldn't come from the NASA budget. (ideally I would like to see it come from medicare/medicad or wellfare or some other social programs) These 'big science' programs further the cause of general research that is the seed corn of new technologies. The US needs to catch up in the areas of fusion and particle physics with the CERN accelorater and the various European tokomaks. (Although admittedly I am of the camp in physics that thinks that IC fusion is far more promising, barring the low temprature fusion thing from panning out)The national labs also provide a huge driving factor for the economy as our supremacy is based on our technological dominance.
The one thing I don't like is people pointing to the DOD budget and saying "OMG the military is spending
so much, we should use all that money for X program"
The DOD is an enabler, if we don't maintain and continue to expand our military dominance we won't be able to ensure our security and we will be increasingly vulnerable to subversion by the rest of the world. Also without the unquestionable insurmountable threat of the American Military Machine it will be very hard to insure the free flow of important raw materials. (eg Oil)
First and foremost the DOD should be A.) Funded to the highest possible extent and B.) Be given carte blanche on procurement and tactics. IE if they think they need a system be free to procure it, not forced to go through the needless process of congressional approval from people who do not understand what they are making policy on. C.) Be free to get rid of cost-plus.
I would speculate that any kind of flight based fusion system be Inertial Confinement based. Have an area of LASERs fire at a pellet of lithium deturide in a combustion chamber filled with tritium or deuterium as a 'starter' this would initiate fusion and you could then use a magnetic nozzel to direct the trust.
As far as adding additional reaction mass to the plasma stream to improve thrust, it's an idea, you would be sacraficing exhaust velocity and temprature but the increased thrust might make sense for VTOL opperations,
I'd say that's long over due. I would even go so far as to say we should can the space treaty in general. I'd love to see the first mission to mars (American hopefully) plant the flag and then proclaim "We claim this new new world for the old new world, we claim Mars for the USA"..../parades ensue/ lol
The United States and Britain and others have been working on rail gun technology for a long time. They want replacements for the large bore main guns that surface combatants are currently using. Gun technology has not really changed in idea since the early 20th century.
Rail guns offer the advantage if working of increased range and impressive damage capability. They also take less room of ammo storage and increased munition safety as they are essentially inert weapons. Other advantages is that they would replace the use of cruise type missiles and are very cheap to fire.
A lot of research has gone into what shape the ammo and cradles will be, not to mention a way to power the magnets that fire the weapon. There is still a lot to do.
Their is alot still left to do, especially when it comes to magnet/power managment but it is mature enought that they are going on the Arleight Bruke class replacement (the DDX) within the next several years.
VASIMR is still a way-off thing... NASA will have to come up with a 1MWe reactor to power the thing, at the very least... such a powerplant is still down the road. VASIMR would really cook with a gas-core nuclear reactor, which is a pretty esoteric concept, or a fusion reactor.
In the short term, it looks like its going to be small nuclear thermal rockets or bigger ion engines.
If we can get NTRs that would be a huge boost to the program. If nothing else it really simplifies the ISRU you have to do on mars as far as getting fuel.
On a different note I would love to see someone do a extensive look at the viability of a gas core reactor as far as engineering goes, GCNR I'm sure you know more then I do if you could point me in the right direction of some sources.
I'm not holding my breathe on the ESA, especially when you take into account that one of the USSTRATCOM (formerly USSPACECOM) space lift programs my buddy manages (can't be more speciffic) has a bigger budget then the entire ESAs budget....
Still it's kewl that they are going a different direction, I was just wondering since I hadn't heard anything in a while. Circa 1999 I know they were playing with it alot at Lewis...I mean Glenn research center and at Los Alamos but it kinda dropped off the face of the earth. It seems like a really good way to significantly improve the preformance of existiting hardware. Build a 15 mile launch track on a slope in the Rockies and then use it to significantly improve the payload of slightly modified Atlas Vs and Delta IVs.
Could there be an upside to the budget cuts? I mean, with no money for CEV, Plan Bush etc., all of NASA's $15.5 billion will be going to the Shuttle/ISS. Maybe if the purse strings are pulled tight enough Congress will finally notice how incredibly wastefull the Shuttle/ISS has been. Surely it isn't possible to continue to spend the entire NASA budget on the Shuttle/ISS for the next six years? Right? Help!?... :bars:
I fail to see how even the most politically motivated senators can not understand the short term benefits that NASA provides to civillian aviation and the long term benefits of down to earth air breathing technologies. (So many people forget the first A in NASA)
We absolutley have to get funding for at least the CEV and the Prometheus program. Those are the minimum two things we have to get this budget cycle to make H2M a viable option in 15 years.
I see space as the single most important issue in this election long term. I don't understand how anyone can see the DNC in general with a professed dislike of the aerospace industry as being on the correct side of this issue (
Notice I chose the word correct and not right, lol)
Frankly I think the best case scenario is that terrorist decide to use a scud full of ten penny nails to take out the ISS (with the crew getting away unharmed) That way NASA has no egg on it's face for abandoning the ISS and we can focus on the more important goals of converting the shuttle infrastructer to a Shuttle C or otherwise HLV configuration and get the CEV flying.
I was also thinking don't Bigellow Aerospace and Space X make the perfect alt space contractors for H2M? One has their sites set on cheaper progressivly bigger expendables the other is privatley developing Transhab derivatives. Just a thought, I'd love to see a fly off in the near future (try before you buy ala Air Force, non cost-plus) between two or three 120-150 tonne to LEO class boosters. Maybe a Space X entrat along with a US Space Alliance Shuttle C and some entrepaneurs revived or updated Energya.
In any event I think NASA is going to end up getting it's money and all will be well if we can successfully get out from under the hippo on our backs that is the ISS/Shuttle duopoly.
I was just wondering if anyone is still pursuing maglev mag assisted launch. I know that was being given lots of consideration several years ago.
http://www.space.com/news/bush_veto_040723.html]Bush threatening Veto over NASA cuts
Just thought I'd throw this out there.
Talk amongst yourselves.
From everything I've raid now matter if you go the route of a plasma drive or nuclear thermal you are going to need a Fission Reactor. For nuclear thermal the need for the reactor is to heat the reaction mass, in a plasma rocket it's the generate electricity to power it. So what the question really comes down to is which is the more efficient use of nuclear power in space.
I think the trick would be to combine the two options. Design a NTR that can also operate as a generator, use a limited amount of reaction mass through the NTR for trans mars interjection then switch over to producing power for an electric plasma drive be it VASMIR or perhaps some sort of IC Fusion device to accelerate to half way and then decelerate to cut the trip time in half. Once you aerobrake and are on the surface I suppose it would be possible to tank in new reaction mass and use the NTR to ascend to orbit and return to earth in the same fashion.
Does the idea of a hybrid NTR/Electric drive make sense? Comment, Questions, Concerns?
Bush may not be the great white hope of space exploration, but if what you say is true (and I suspect it is) Kerry is the reaper.
*The cost of the Iraqi war was underestimated by $30 billion dollars. Recently $25 billion was shelled out on an emergency basis for continued support of the war. That won't be the end of it.
It's Bush who is driving the nails into the coffin of American space exploration. But I guess The Golden Boy is above taking any blame. (The economy is still in the toilet...oh well, blame Clinton!).
And no, I'm not a Kerry supporter. But I won't vote for Bush.
--Cindy
Economy in the toilet? I'd say that is far from being accurate, manufacturing orders are up, especially in the north east, we still have negligible inflation, especially if you don't look at gas prices and last quarter was a record for new small businesses. When it comes down to it most people vote their pocketbooks and if the economy is doing well come the fall I think that essentially seals the deal. I know I for one have been very pleased with my portfolio the last three quarters.
I'm not saying I am any fan of Bush, I most certainly am not; on the domestic agenda he has been rather bad! He signed a massive new social entitlement program in the form of prescription drugs (Republicans...party of small government?) He banned the expansion of stem cell research and his tax cuts didn't touch business or capital gains taxes which need to be cut in the worst possible way, although I suppose he should be applauded for sticking to his guns and making sure that all brackets got a rate cut. Not to mention the horrible blunder that is the patriot act.
I feel like I am without a party because it doesn't seem like the Republicans are standing up for the Lochean/Jeffersonian values of small government and laise faire economics they used to. That being said I still think Bush is by far the lesser of two evils for the following reasons.
A.) He has come out in support of leaving LEO. Even if support has been weak, it has been better then nothing, and there is work being done behind the scenes in the house to make sure NASA gets its full budget request when they consolidate the house and Senate versions of the budget.
B.) Bush has started initives to strengthen the military and heal the wounds made by short sighted cuts during the 90s especially in the area of development and procurement. To name a few issues, the Navy has been forced to retire ships twice as fast as it can replace them in a period of increasing demand. There is program now to change the way the Navy buys ships so that Electric Boat and others will be able to speed production of the new Virginia class Attack sub and the DD(X) so that the fleet will cease shrinking by FY06 and grow back to optimal size by FY08. Also he has set the much needed precedent for space control by leaving the ABM treaty. I can go into more on this subject but that's all I can say in a white world capacity.
C.) His foreign policy. He has stood up for American sovereignty in the socialist joke that is the UN. Many times in instances as minor as having our ambassador walk out of the 'Conference for the Control of Civilian Small Arms' to his actions in Iraq. WMDs or not a democratic Iraq will change the face of the region and most importantly be a model and an antagonist for the civil unrest brewing in Iran, so that a Democracy can be established there without a shot being fired. Also it demonstrates to North Korea that we aren't afraid to pull the trigger. Kerry has made it very clear that when it comes to the use of the military he would be far to gun shy.
D.) Kerry has said repeatedly that he would raise taxes. Not a smart thing to do in a growing economy. Fix that tax rate, and once the war in Iraq is over in two or three years the growth that will have been spurred will have out paced the debt and we will be in surpluses again by FY2008 or FY2009.
All these are ancillary issues in my mind to the main issue in this election. Kerry would destroy NASA and the National Lab systems as well as the current military R and D structure. The national labs have to be given carte blanche so that they can keep our country on the bleeding edge of technology. Our technological supremacy is what gives us our military and economic strength. NASA is essentially in the same boat, except and even longer term investment towards our future off world. Both organizations would be ravaged by budget cuts and restrictions by a hypothetical the Kerry administration. Point and case you can kiss any new nuclear power programs, either on the ground or in space bye-bye once you have a president bought and paid for by radical environmentalist. His administration would also be less receptive to utilizing the new burgeoning space start-ups.
/soap box off/ lol
Wouldn't it be nice if space was not an issue that incited politics?
I had to deal with this freshmen year when I made the mistake of living in the dorms, my roommate snored with the intensity of a project orion esque series of thermonuclear detonations....it was bad.
The solution, bose sound canceling head set with Bach or Mozart(sp?) playing on nights when the scilence was too quiet.
If you havn't tried on a headset with active sound canceling, it's hard to belive how well they work.
A lot has been said about budgets, but it is surprising how still in some endeavors how much difference one genius can make.
True. I heard that Russia was investigating ultra-high pressures and the phase change of hydrogen into metalic solid. They built a giant hydrolic press in an attempt to create the pressure necessary. Then one American researcher developed the diamond anvil press; it uses a small titanium frame to squish two diamonds together, compressing the sample between them. A frame uses a screw and leverage to apply force to the diamonds. It's a simple and small device that was far more effective than the giant monstrosity of previous attempts.
As a current example: The U.S. Navy is studying construction of a http://www.nfesc.navy.mil/ocean/esc50/o … htm]Mobile Offshore Base (MOB). This is a gigantic military asset designed for naval assault. The cruicial question has to be "why". Why build such a thing? Combat against a country such as Russia would be such a large endeavor that a base like this would be far too small. Combat against Iraq was so swift that it was enough to use current carriers and assault craft carrying Landing Craft Air Cussion (LCAC). Military operations quickly became land-based. Small and rapid deployment are important, not a giant slow base.
So how can this philosophy be applied to jet engine development? How can a SCRAM jet engine be developed quickly using affordable lab equipment?
In refrence to the Mobile Offshore Base it's not intended so much as an uber aircraft carrier as a mobile Diego Garcia. (sp?) In the middle east and else where we have to deal with allies that may or may not supoort our opperations and thus might not give us baseing privileges. The MOB will give us the ability to opperate conventional aircraft in theater without having to deal with host nations.
I think you are right though that air breathing hypersonics will make a beter solution then the MOB. A hypersonic B-3 based in the CONTUS would be a much more effective weapon platform and less vulnerable.
As far as the Russians SCRAM program goes, while the Ruskies make up for their shoe string budgets with creativity and a willingness to take risks that regretable no longer exists in our space program, I just don't seem them as having the epertise or technological maturity to make it work. ABHS is far too important a stratigic technology for the US not to acheive first.
So, to answer your question, I say that the colonization of Mars should not be managed at all, but be done through the joyful chaos of human freedom.
I like that wording. Maybe a little dangerous, a little bloody at times, but the only way we'll really make progress.
I think that says it all. The pioneers of the Martian frontier will be the Americans of the future.
In more ways than one, if we get our act together. :;):
lol,
Cobra you beat me to it on the American comment, we really think alot alike. ![]()