Talk-Polywell.org

Some space tech has been dug out and redone decades later. As when they had to dig a used Apollo heat shield out of storage at the Smithsonian to relearn how to make heat shields for Constellation. What a giant leap backwards. http://www.nasa.gov/centers/goddard/news/topstory/2008/apollo_shield.html

The fusion-powered turbojet with closed heat exchanger is not for a launch vehicle. It's for an airplane. I think we're too ingrained with the notion that we have to get to orbit in a hurry, before the fuel runs out, a legacy of decades spent on chemical rockets. Fusion opens up the possibilty of a...

That's what I've been trying to get across to you. Instead of using a REB to heat the air directly, you use it to heat a fluid in a closed loop. This fluid is pumped through a counterflow heat exchanger in the engine, thus heating the air. OK, speaking only of lower altitude, low-to-moderate speed ...

I would be surprised if they did not find something else to deliver parts for though. After all, the US will order many more UAVs in the future. So many actually, that they are having troubles finding pilots. Parts is parts? No, sorry, the parts are airplane-specific and storing jigs, fixtures, too...

Well most of your enemies that would require those planes would be in eastern asia anyway, so more or less the same corner of the globe. Also I doubt that you will need a total of 187 F22s to just deal with North Korea. 187 is less than half the number needed for the total force, per military plann...

I do agree that a full termination may not be a good decision (money wasted), putting the production on hold until the need arises however is. You can always ramp up production again, should the need arise. You're forgetting about the thousands of specialty component suppliers that go bankrupt duri...

Pardon the brief divergence from geopolitics and socioeconomics...

Terminating F-22 production at a mere 187 units after almost 30 hard-fought years of development from initial concept is, frankly, insane.

http://www.afa.org/ProfessionalDevelopm ... arison.pdf

On the other hand, a REB that is magnetically or electrostatically diffused/defocused might reduce the destructive impingement effects so that a REB-to-air/propellant heat exchanger is possible (no direct REB-air contact to avoid ozone generation), in which case the Stirlings, fans and turbines coul...

Plus you don't have to deal with multiple GW of electricity, which is difficult even at low voltage. Looking at large helicopters (CH-53K), the max takeoff weight power-to-weight ratio is somewhere in the neighborhood of 200 W/lb. A heavy 500,000 lb vehicle (widebody airliner class) would need (ver...

93143 wrote:I don't see what's wrong with a Brayton cycle, using the airstream as a working fluid...

Doesn't that lead you right back to the problem of how to heat the airstream?

This is depressing. My VTVL Polywell-powered space flitter is starting to look like an ozone/neutron/gamma-ray spewing humanoid annihilator during low altitude (non-QED/ARC) operation, if I can believe what you're telling me. OK, time to dig deep into the well of engineering creativity, to come up w...

Besides, right now at least they are not invading anybody. They have left Georgia already too, didnt they? "Let us face the facts, both Abkhazia and South Ossetia are now effectively under Russian control, and will be for a while yet." http://www.sosgeorgia.org/2008/09/04/abkhazia-should-be-indepen...

http://www.livescience.com/technology/091013-dyson-fan.html This doesn't look like it would have any applications to engine design, does it? http://www.flodesign.org/pdf/AIAA20020230.pdf They had a newer jet/rocket air-augmented nozzle design using cascaded, fluted rings of increasing diameter, but...

A similar air entrainment concept has been marketed for quite a while...

https://secure.vortec.com/store_products.php?catID=14

Powered by compressed air. A typical use is removal of welding fumes.

DeltaV wrote:Hopefully ... (5) a multi-MW FEL could be made lightweight/small/efficient.

http://www1.jlab.org/Ul/Publications/do ... -05-02.pdf