2 upvotes, 0 direct replies (showing 0)
View submission: xkcd: Quantum Vacuum Virtual Plasma
2: https://en.wikipedia.org/wiki/EmDrive
--------------------------------------------------------------------------------
In July 2014, a NASA team at the Advanced Propulsion Physics Laboratory (informally known as *Eagleworks*) located at the Johnson Space Center (JSC) and led by physicist [Harold G. White](https://en.wikipedia.org/wiki/Harold_G._White_(NASA%5C[3])), reported on an evaluation of a RF resonant tapered cavity similar to Shawyer's EmDrive, with positive results.
3: https://en.wikipedia.org/wiki/Harold_G._White_(NASA%5C
Testing was performed on a low-thrust torsion pendulum[4] that is capable of detecting force at a single-digit micronewton level, within a sealed stainless steel vacuum chamber[5], but at ambient atmospheric pressure[6], because the RF power amplifier[7] used an electrolytic capacitor[8] not capable of operating in hard vacuum.
4: https://en.wikipedia.org/wiki/Torsion_pendulum
5: https://en.wikipedia.org/wiki/Vacuum_chamber
6: https://en.wikipedia.org/wiki/Atmospheric_pressure
7: https://en.wikipedia.org/wiki/RF_power_amplifier
8: https://en.wikipedia.org/wiki/Electrolytic_capacitor
NASA's tests of the tapered RF cavity were conducted at very low power (50 times less than Shawyer's 2002 experiment and 150 times less than the Chinese 2010 experiment) but a net mean thrust over five runs was measured at 91.2 µN at 17 W of input power. A net peak thrust was recorded at 116 µN at the same power level.
--------------------------------------------------------------------------------
^Interesting: ^Roger ^Shawyer[9] ^| ^New ^Scientist[10] ^| ^Quantum ^vacuum ^plasma ^thruster[11] ^| ^Reactionless ^drive[12]
9: https://en.wikipedia.org/wiki/Roger_Shawyer
10: https://en.wikipedia.org/wiki/New_Scientist
11: https://en.wikipedia.org/wiki/Quantum_vacuum_plasma_thruster
12: https://en.wikipedia.org/wiki/Reactionless_drive
^Parent ^commenter ^can [^toggle ^NSFW](http://www.np.reddit.com/message/compose?to=autowikibot&subject=AutoWikibot[13] NSFW toggle&message=%2Btoggle-nsfw+cjiiz7y) ^or [^delete](http://www.np.reddit.com/message/compose?to=autowikibot&subject=AutoWikibot[14] Deletion&message=%2Bdelete+cjiiz7y)^. ^Will ^also ^delete ^on ^comment ^score ^of ^-1 ^or ^less. ^| ^(FAQs)[15] ^| ^Mods[16] ^| ^Magic ^Words[17]
13: http://www.np.reddit.com/message/compose?to=autowikibot&subject=AutoWikibot
14: http://www.np.reddit.com/message/compose?to=autowikibot&subject=AutoWikibot
15: http://www.np.reddit.com/r/autowikibot/wiki/index
16: http://www.np.reddit.com/r/autowikibot/comments/1x013o/for_moderators_switches_commands_and_css/
17: http://www.np.reddit.com/r/autowikibot/comments/1ux484/ask_wikibot/
There's nothing here!