http://www.cbsnews.com/stories/2007/09/04/national/main3231260.shtml In a nutshell, Steve Fossett (who I figure is the most likely next person to orbit the...
Hello All! I am new to these groups. I saw info about you over at MarsDrive and joined right away! I am interested in the development of asteroid mining...
First, most upper stages and tanks are integral construction. The one I know of which ain't is the Delta II...and its "tube" is reduced to a tiny ring. So we...
Hi Kevin, Welcome! Hope you'll enjoy the ride as we do. Thanks to Marsdrive and Frank!! Actually I'm still lagging behind to get something up on Marsdrive.... ...
The problem with the MET (or any electrothermal engine) is that you're limited to the expansion properties of the propellant. The Isp of the MET will be...
Actually the MET does much better than any chemical engine, but it does require a large external power source. It heats the water up to where it just starts to...
Hi Terry, Well, apparently METs have been tested to 800s ISP, not the 400s limit which you seem to go from (see the annotation below). That puts them beyond...
... Then it goes beyond thermal somehow, since no known materials can withstand the temperatures you'd need to get 800s out of water vapor. ... Dunno, haven't...
Alas, that paper has numbers for only helium (350sec) and nitrous oxide (190sec), the ones I'm looking for are "click to pay here" links, so I can't get...
Yes cannon could work as the first stage for small very simple compact none fragile resources like water, and simple metals. The other systems we have looked...
Hi Terry, Thanks for looking this crazy idea through. Let me comment: Ueli: So we boost cans of water into space for fuel for the orbital tugs. Terry: After...
... Terry: I was talking about the booster, not the MET. Anyway, the tug would probably be quite low accelleration at 800sec because it would need high ...
I like it too. My oxymethane plans were born of impatience, both in terms of technological development (i.e.: I'm sure we can develop an oxymethane semi-tug...
Awesome! It's a great milestone for the orbital tug, ... Awesome! It's a great milestone for the orbital tug, with everything you need for functionality and...
Hi Ueli, There is already a link to the NEAMines website from 4FC. Cheers, Joe ... Joseph E. Palaia, IV VP, Operations / R&D and CoFounder 4Frontiers...
Joseph E. Palaia, IV
joe@...
Sep 21, 2007 8:52 pm
1103
Jan and Terry, You've both been wondering about various mission profiles for the tugs and wondering how METs fit in..... Hm..... - right: Now we're getting...
... Actually, the math is pretty simple (I can do it with a standard scientific calculator, the only funky button you hit is ln/e^x (usually one button with ...
Sept. 24, 2007, 3:49PM GERMS SENT TO SPACE RETURN THREE TIMES AS DEADLY By ERIC BERGER Houston Chronicle Last summer, scientists blasted several samples of...
Hi all, So our milestone on the LEOtug is now "official", and all the links are okay (I hope) on our website at http://www.asteroidmines.net Have a look...
I need to comment on the Met tug suggestion. We should work at trying to keep the mass of the tug low. The only reason I see to have two sets of graspers is as...
Wow Jim, lots of ideas here. I think this belongs over into the Orbitugs group at http://groups.yahoo.com/group/NEAminesOrbitugs instead of here on our mother...
You know Jan, this kind of tells me there will be a market for partial G science. I mean: When we build the "garage" in LEO with the spin-graved habitat, there...
Hi Terry, You wrote: "Probably the best place for carbonyl metallurgy is Mars orbit, since, once a base is established, you will be making oxygen for the...
Just a line to say that the 'EOS Mars Program' is represented on the NASA Dawn Mission to the Asteroids, as one of the many names embedded in a microchip...
Have always thought the limiting factor in manned spaceflight is human physiology, Ueli! The technology can be easy to achieve, but disease and body wasting...
Hi all, Here you are with an effort I'm making to engage with people on the MET front. Look Orbitec up at http://www.orbitec.com I thought you might be...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
