Search found 154 matches

by Stoney3K
Mon Jul 26, 2010 11:40 pm
Forum: General
Topic: High Speed Rail
Replies: 37
Views: 5531

Re: High Speed Rail

Now suppose it could operate on drop down electric motorized wheels near stations (thus fans off) and on an air cushion for high speeds. The cost of the "rails" would be about the same as building a roadway. The question is could it be made to pay? More: http://en.wikipedia.org/wiki/Hovertrain Well...
by Stoney3K
Wed Jun 30, 2010 10:38 am
Forum: Implications
Topic: Polywell Visions: Transprotation
Replies: 61
Views: 55872

Space weapons are technically illegal. When you have a gun that's big enough, the rules of engagement don't apply anymore. Sure, somebody can tell you "Hey, you're not allowed to do that!", but that won't stop you from blasting their city off the map. Anyway, orbital weapons satellites are quite a ...
by Stoney3K
Wed Jun 30, 2010 10:20 am
Forum: Theory
Topic: How long ago could we have built polywells? (WW II ?)
Replies: 30
Views: 7024

My apologies. From what little I know, my opinion is that the earliest a Polywell could have been made was probably somewhere around 1930. This is due to the fact that while superconductors help they aren't needed, but the vacuum tube tech at the time would have helped it a great deal (assuming tho...
by Stoney3K
Wed Jun 30, 2010 10:11 am
Forum: Theory
Topic: How a bout a destructive test of a cheap Polywell WB8 sized.
Replies: 11
Views: 3150

Re: How a bout a destructive test of a cheap Polywell WB8 si

And put diagnostic equipment all over it. Shoot the thing off in a mineshaft at the Nevada test site PROVING GROUNDS. See what kinds of alphas and neutrons you get, just blow the thing up with extreme levels of power and minimal fuel to prevent vaporizing the diagnostic equipment with a 15 kiloton ...
by Stoney3K
Wed Jun 16, 2010 12:47 pm
Forum: News
Topic: Elon got his rocket up ...
Replies: 118
Views: 21653

Picture a small rocket with infinite impulse capability pushing an equatorial geosynchronous satellite northward. It still has a circular orbit, but it is displaced a certain amount north of the equator. With just the right amount if continuous thrust, you could cause it to "orbit" over any latitud...
by Stoney3K
Wed Jun 16, 2010 12:39 pm
Forum: News
Topic: Elon got his rocket up ...
Replies: 118
Views: 21653

Everyone talks about using nets to wrap and snag larger debris and stray sats. A sensible solution given the the lack of unified grappling fixtures.. or any grappling fixtures for that matter... but isn't that net the very definition of a space baggie? This is obviously a job for Commander Quark an...
by Stoney3K
Wed Jun 16, 2010 8:49 am
Forum: Implications
Topic: Cheap Clean Abundant Power: Secondary Implications
Replies: 20
Views: 27071

Could you imagine NASA's crawler taking power off a giant trolley line? :lol: The crawler is one of the situations where that would actually WORK. Since it's confined to a (fairly) fixed track of motion, there's no reason you couldn't shove an HV plug up that thing's backside and make it work. Or j...
by Stoney3K
Wed Jun 16, 2010 8:43 am
Forum: Design
Topic: FAQ on "Major Engineering" Needed
Replies: 7
Views: 4311

AFAIK, plasma stability problems are also what is bothering Tokamak systems, so there is extensive research being done into that right now.

Several solutions have been proposed, but there's no practical, reliable solution yet. We're close, but not 100% there.
by Stoney3K
Sat Jun 12, 2010 5:33 pm
Forum: General
Topic: Alternate Space Elevator Design
Replies: 25
Views: 5999

Tom Ligon brings up a very good point, a negatively charged tower will collect positive ions. In addition to lightning discharges, such a tower reaching above sensible atmosphere would have a steady ion collection from ambient ions. If the envelope was conductive there would be a constant contest b...
by Stoney3K
Sat Jun 12, 2010 4:59 pm
Forum: Design
Topic: Using atmosphere as propellant
Replies: 151
Views: 102400

A jet is a ducted fan designed for high speed. That's all it is. If you could change the length depending on airspeed, that would be cool. But ducted fans have horrid performance above about mach 0.3; we want to hit mach 15 at least in atmosphere. Jets are an added expense in mass, to allow takeoff...
by Stoney3K
Sat Jun 12, 2010 9:16 am
Forum: Design
Topic: Using atmosphere as propellant
Replies: 151
Views: 102400

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. I was just trying to avoid using MLT's and other reactionless devices. When you're in the atmosphere, you've got reaction mass for free (namely, the atmosphere). The trick is...
by Stoney3K
Fri Jun 11, 2010 8:12 pm
Forum: Design
Topic: Using atmosphere as propellant
Replies: 151
Views: 102400

That only holds if you're counting friction-based re-entry. Basically, if you can control your rate of descent and do not need to rely on atmospheric drag to slow you down, you can descend vertically on a dime with 2 KPH if you want. That requires propellant, if you don't have MLTs. Propellant has ...
by Stoney3K
Fri Jun 11, 2010 7:28 pm
Forum: Design
Topic: Using atmosphere as propellant
Replies: 151
Views: 102400

Combine with high bypass turbofan systems for low speed, atmospheric flight, and mount the engine nacelles on a set of gimbals similar to a V-22 to control your direction of thrust. Gimballed thrust pods will probably melt at reentry. Everything has to be flush/sealed, especially the front, bottom ...
by Stoney3K
Fri Jun 11, 2010 6:51 pm
Forum: Design
Topic: Using atmosphere as propellant
Replies: 151
Views: 102400

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...
by Stoney3K
Fri Jun 11, 2010 1:42 pm
Forum: Design
Topic: Using atmosphere as propellant
Replies: 151
Views: 102400

Re: Using atmosphere as propellant

This is true for traditional chemical propulsion, where you have to get to orbit in a hurry before you run out of cryogenic or hydrocarbon propellants. This is not true for a winged Polywell-powered flying machine using relatively small amounts of H and B11 to heat atmosphere as propellant. Propuls...