"Ny" effektiv fremdrifts/opdriftsform "opdaget"

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From Danish to

(Svar sendes til dk.videnskab )

Hvem her har leget med ionvindsdrev?


Som de skriver kan den "nye" effektiv fremdrifts/opdriftsform anvendes i  
mindre fartøjer:

Massachusetts Institute of Technology (2013, April 3). Ionic thrusters  
generate efficient propulsion in air. ScienceDaily:
Citat: "...
This phenomenon, called electrohydrodynamic thrust -- or, more  
colloquially, "ionic wind" -- was first identified in the 1960s. Since  
then, ionic wind has largely been limited to science-fair projects and  
basement experiments; hobbyists have posted hundreds of how-to videos on  
building "ionocrafts" -- lightweight vehicles made of balsa wood,  
aluminum foil and wire -- that lift off and hover with increased voltage.
Now researchers at MIT have run their own experiments and found that  
ionic thrusters may be a far more efficient source of propulsion than  
conventional jet engines.
[Den store overraskelse:]
In their experiments, they found that ionic wind produces 110 newtons of  
thrust per kilowatt, compared with a jet engine's 2 newtons per kilowatt.
Steven Barrett, an assistant professor of aeronautics and astronautics  
at MIT, envisions that ionic wind may be used as a propulsion system for  
small, lightweight aircraft. In addition to their relatively high  
efficiency, ionic thrusters are silent, and invisible in infrared, as  
they give off no heat -- ideal traits, he says, for a surveillance vehicle.
A basic ionic thruster consists of three parts: a very thin copper  
electrode, called an emitter; a thicker tube of aluminum, known as a  
collector; and the air gap in between.
As this cloud of ions moves toward the collector, it collides with  
surrounding neutral air molecules, pushing them along and creating a  
wind, or thrust.
Barrett acknowledges that there is one big obstacle to ionic wind  
propulsion: thrust density, or the amount of thrust produced per given area.


Hvorfor laver Danmarks Radio ikke en ny "Jørgen Klevin" serie - første  
udsendelse kunne indledes med: "Og i dag skal vi lave et "Warp-Drive" af  
kobbertråd, aluminiumsfolie, balsatræ, sekundlim og en gammel monitor" -  
PS: Ment i sjov, da højspænding kan være farlig, afhængig af mulig høj  

Apropos - dog ionvindsdrev giver IKKE antigravitation!:

Det der kaldes "magnetisk tråd" er IKKE magnetisk tråd. Det er blot  
almindelig lakisoleret kobbertråd, som også anvendes til at bevikle  
elektriske transformatorer. Her af navnet "magnetic wire".

Citat: "...16) Strip the end of this wire (-) and solder it to the end  
of 70 cm length of 0.1 mm [38 AWG] insulated copper magnet wire.... The  
UFO-Lifter v1.0 works very well with a simple 30KV power supply..."


Conseils pour alimenter un Lifter par Claude Dupré ( France ):
Citat: "...
I have enclosed an explanatory document on how to use the high voltage  
from a monitor to supply power to a Lifter.

Be cautious around high voltage!
Share your experiences.

Cordial greetings,
Claude Dupré

Some advices for providing power to a Lifter :


Site Timeline