Fuel-less Space Thrusters (?)--The EmDrive's revenge

heckler73

Well-Known Member
http://www.space.com/26713-impossible-space-engine-nasa-test.html

The roots of the propulsion system tested by the NASA team trace back to a British researcher named Roger Shawyer, who claims that his "EmDrive" generates thrust by rocketing microwaves around in a chamber. There is no need for propellant, as solar power can be used to produce the microwaves.

Shawyer says that his company, Satellite Propulsion Research Ltd., has successfully tested experimental versions of the thruster. But many scientists have dismissed or downplayed such claims, saying the propulsion system violates the law of conservation of momentum, Wired UK reported.

In 2012, however, a team of Chinese researchers built their own version of the system and found that it does indeed work, generating enough thrust to potentially power a satellite. Then, an American scientist named Guido Fetta constructed his own device, which he calls the "Cannae Drive," and convinced the NASA team — which included warp drive researcher Sonny White — to try it out, which they did over the course of eight days in August 2013.

The NASA scientists determined that the Cannae Drive produces 30 to 50 micronewtons of thrust — less than 0.1 percent of that measured by the Chinese team, Wired UK noted, but nevertheless suggesting that the technology works.

The thruster may work by somehow harnessing the subatomic particles that continuously pop into and out of existence, the NASA researchers suggest. The results and the technology are promising enough to warrant further study, they wrote in the study.

"Future test plans include independent verification and validation at other test facilities," the researchers wrote.

You can read the abstract of the NASA team's new paper for free here: http://ntrs.nasa.gov/search.jsp?R=20140006052

It makes me curious as to why we don't hear anything about the Chinese experiments from 2 years ago, but this fly-fart goes across the board.
Maybe it's because it was written in English? Or like everything else from Zhong-guo, one shouldn't be too quick to take their word for more than it is.
 

heckler73

Well-Known Member
WELL
There's an update to this :lol:
I'm pretty surprised, actually.


http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/

While the current maximum reported efficiency is close to only 1 Newton/kW (Prof. Yang’s experiments in China), Mr. March noted that such an increase in efficiency is most likely achievable within the next 50 years provided that current EM Drive propulsion conjectures are close to accurate.


Far more ambitious applications for the EM Drive were presented by Dr. White and include crewed missions to Mars as well as to the outer planets.


Specifically, these two proposed missions (to Mars and the outer planets) would use a 2 MegaWatt Nuclear Electric Propulsion spacecraft equipped with an EM Drive with a thrust/powerInput of 0.4 Newton/kW.


With this design, a mission to Mars would result in a 70-day transit from Earth to the red planet, a 90-day stay at Mars, and then another 70-day return transit to Earth.


 

ttystikk

Well-Known Member
Digital power for spacecraft? It's reacting against the very fabric of The Matrix itself? LOL

Seriously this sounds pretty far out, but who knows? Stranger things have come to pass...
 

heckler73

Well-Known Member
Digital power for spacecraft? It's reacting against the very fabric of The Matrix itself? LOL

Seriously this sounds pretty far out, but who knows? Stranger things have come to pass...

And given a 50 year timeline? Quite possible. If it can even reliably put out "fly-farts", it will be good enough for inter-planetary travel.

Oh...and if you're feeling really "spunky", you might want to take a gander at this piece of work from someone I know. It is more along the lines of gravitational warping...however, it is worth noting he begins with a "vector field in Euclidean 3-space", so the general principles may still apply.

http://www.sfu.ca/~adebened/funstuff/warpdrive.html

 

heckler73

Well-Known Member
Hmmm...I've been reading the tail end of the "big thread" associated with the EM Drive.
An interesting graphic was posted showing (I assume) the EM fields in the hypothesized drive. I'm not sure what it is, but something about it resonates with me (no pun intended).


 
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