Search found 371 matches
- Fri Jun 11, 2010 9:30 pm
- Forum: Design
- Topic: Using atmosphere as propellant
- Replies: 151
- Views: 157886
Stoney3K, the rest of us are working in the realm of "Real, proven" - not "might possibly be, if we wish hard." If you have a massless thruster, then, of course you can go to the moon on a whim and never have to play with reaction mass. Just like if I have a Unicorn to ride, I never have to worry ab...
- Fri Jun 11, 2010 7:12 pm
- Forum: Design
- Topic: Using atmosphere as propellant
- Replies: 151
- Views: 157886
One concept has been using water injection into an heated aristream in atmosphere and a heat-based rocket engine for added thrust outside atmosphere. Since high speed electric fans are light and effective, I put my vote on this concept as reaching SSTO first. We already have very efficient gas turb...
- Fri Jun 11, 2010 6:19 pm
- Forum: Design
- Topic: Using atmosphere as propellant
- Replies: 151
- Views: 157886
Any system using an atmospheric engine has to balance the usefulness of the airbreather against the mass of it. Is 3-5 kps worth the added mass? One concept has been using water injection into an heated aristream in atmosphere and a heat-based rocket engine for added thrust outside atmosphere. Since...
- Wed Jun 09, 2010 5:27 am
- Forum: Theory
- Topic: Another (simple) FAQ - DONE
- Replies: 79
- Views: 21665
Bussard studied the ionization issue extensively (it was one reason he built PZLx-1). If you have a paper that suggests Bussard's number is way off, I'd be curious, but it seems safe to ignore this in the FAQ. It seems unlikely neutrals can survive more than usecs. You really just don't seem to und...
- Fri Jun 04, 2010 8:02 pm
- Forum: General
- Topic: How to solve the first wall problem. :} use Boron.
- Replies: 4
- Views: 3940
- Fri Jun 04, 2010 6:19 pm
- Forum: Theory
- Topic: Help with Describing a Graphic Please
- Replies: 17
- Views: 5669
I know it was 10MW for a reactor, I hadn't seen that # for WB-6. Let's see, if WB-6 was around 100KV, that would make it... 100A (100A x 100,000V = 10,000,000W)? I guess that's possible. http://www.emc2fusion.org/QuikHstryOfPolyPgm0407.pdf WB-6 was driven at 12.5K V and2000A. So it was a very short...
- Thu Jun 03, 2010 4:32 am
- Forum: Theory
- Topic: Initial Polywell Simulation
- Replies: 18
- Views: 10321
- Wed Jun 02, 2010 5:41 pm
- Forum: Theory
- Topic: A Funel analogy instead of a Wiffleball analogy
- Replies: 6
- Views: 3012
I like this analogy, but have a question. Since the fuel ions are charged, near and being impinged on by the magnetic field, they are also spiraling in the direction of the flux. The marble in the funnel is spiraling towards the exit, but there are other ways it can spin as it heads that direction ...
- Wed Jun 02, 2010 3:03 am
- Forum: General
- Topic: Electoral Map
- Replies: 4
- Views: 2957
- Wed Jun 02, 2010 2:49 am
- Forum: Implications
- Topic: QED drives vs. Orion drives?
- Replies: 6
- Views: 15822
http://www.askmar.com/Fusion_files/The%20QED%20Engine.pdf Is the paper properly about the suggested engines. It suggests a thermal drive for raw thrust/high mass ratio. High ISP is accomplished by using ion drives such as in VASIMR. He's honestly suggesting Isp of 200,000 to 1,000,000 for his vacuum...
- Tue Jun 01, 2010 4:04 am
- Forum: General
- Topic: I wasn't going to post anything politcal, but
- Replies: 2
- Views: 1255
- Tue Jun 01, 2010 3:50 am
- Forum: Theory
- Topic: Another (simple) FAQ - DONE
- Replies: 79
- Views: 21665
- Mon May 31, 2010 3:02 pm
- Forum: News
- Topic: Novel battery tech.
- Replies: 23
- Views: 10174
interesting, can they make this battery fit in a car? If so, how long can a car operate with this battery before it has to recharge? How long does it take to fully recharge? I'm more interested in that actually. Any battery or capacitor technology is fully scalable - and scaling up is easier than d...
- Mon May 31, 2010 2:34 pm
- Forum: Design
- Topic: Design FAQ issues - discussion thread
- Replies: 11
- Views: 7521
You've confused your magnetic and electrical fields. Magnetic field constrain the electrons. The magrid makes magnetic fields. The polywell consists of .... Within the MaGrid, magnetic fields confine most of the electrons and those that escape are retained by the electric field Recirculate: To exit ...