Modérateurs : Aer, Equipe forum MATA-WEB
Snack Bar chez Léon : Venez parler sur tout et rien voir surtout de rien
Retourner vers Snack Bar chez Léon
Windspirit a écrit:[Montrer] Spoiler
Le mec a participé à faire atterrir une sonde sur une comète. Il peut s'habiller en clown et quand même devoir forcer le respect.
Windspirit a écrit:Le mec a participé à faire atterrir une sonde sur une comète. Il peut s'habiller en clown et quand même devoir forcer le respect.
Ialda a écrit:Les deux sont disproportionnés.
C'est comme si tu refusais son certificat de détective privé de l'année à Thomas Magnum pour cause de port de chemise hawaienne aggravé d'une moustache broussailleuse.
This paper describes the eight-day August 2013 test campaign designed to investigate and demonstrate viability of using classical magnetoplasmadynamics to obtain a propulsive momentum transfer via the quantum vacuum virtual plasma. This paper will not address the physics of the quantum vacuum plasma thruster, but instead will describe the test integration, test operations, and the results obtained from the test campaign. Approximately 30-50 micro-Newtons of thrust were recorded from an electric propulsion test article consisting primarily of a radio frequency (RF) resonant cavity excited at approximately 935 megahertz. Testing was performed on a low-thrust torsion pendulum that is capable of detecting force at a single-digit micronewton level, within a stainless steel vacuum chamber with the door closed but at ambient atmospheric pressure.
The NASA report wasn't much help either, since it only delved into the practicalities of testing one of the devices. At first glance, however, it looked quite interesting, stating, "Approximately 30-50 micro-Newtons of thrust were recorded from an electric propulsion test article." If you push a bit further, it looks much less promising:Thrust was observed on both test articles, even though one of the test articles was designed with the expectation that it would not produce thrust. Specifically, one test article contained internal physical modifications that were designed to produce thrust, while the other did not (with the latter being referred to as the "null" test article).
In other words, the negative control in the experiment worked. Which means that the experiment as a whole tells you nothing. Clearly, the device (even when disabled) appears to produce a force. But Lee suggested a variety of ways that this could happen and indicated that there are ways to monitor the device's operation to see if any of them play a role (for example, he suggested that a mass imbalance of as little as 3 mg could account for the small force the NASA researchers found. "All in all," Lee concluded, "it will take a lot more information before we can judge whether the thrust is really a thrust or not."
Retourner vers Snack Bar chez Léon
Utilisateurs parcourant ce forum: Aucun utilisateur enregistré et 3 invités