tag:blogger.com,1999:blog-8051630750074978974.post5185537858655171594..comments2023-12-19T09:40:12.020-08:00Comments on The Emoluments of Mars: The short, short life of the EM driveexpathttp://www.blogger.com/profile/10369924104634464934noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-8051630750074978974.post-28354996702913659172018-06-12T11:51:54.102-07:002018-06-12T11:51:54.102-07:002%-- Now that this comment has been rescued from b...2%-- Now that this comment has been rescued from blogpost comment hell, I can affirm that the 2 amps figure is a direct quote from the Tajmar paper. <br /><br />I agree about the heat problem.expathttps://www.blogger.com/profile/10369924104634464934noreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-55139901537174062802018-06-04T16:20:33.624-07:002018-06-04T16:20:33.624-07:00Ummm...
2 Amps!!??
Which current are you referri...Ummm...<br /><br />2 Amps!!??<br /><br />Which current are you referring to? The heater / filament current for the magnetron? As I understand it, that's AC, so isn't going to explain this, methinks.<br /><br />There's also the high voltage supply... The article abstract says it's a standard, commercial 700W magnetron, but doesn't give more info. What I know is that the HV supply is DC, so that is relevant. However, the typical HV supply for a magnetron is around 5kV. Even if we assume only 70% efficiency (seems low - it's gonna get very hot very fast), at 5kV, 1kW will require 0.2 Amps DC. That's an order of magnitude lower than your figure.<br /><br />But, as I said, it's going to be generating quite a bit of heat. Not sure how that's going to affect things (in a near vacuum) as I don't know the point of suspension, but maybe it's radiant heat effecting the torsion arm...?<br /><br />I presume the "big end" of the microwave cavity is also closed by a copper sheet? Dunno how that's gonna work. ALL the electrical power being supplied has to end up as heat, if none of the microwaves can escape. (Unless, of course, some of it is being consumed turning the interior to gold plate, right Orbs?) <br /><br />In reality, there's ~1kW of power being delivered to that contraption. How hot is it gonna be before it reaches thermal equilibrium, and what effects will that have? (BTW, commercial microwave ovens have a fairly powerful fan to cool the magnetron, but this thing can't cool that way, so early failure seems pretty certain.)<br /><br />Whatever, it's certainly not a "free energy" drive, even it it (impossibly) could push far less than a gnat can lift. You're gonna need a nuclear power plant to get enough drive to go anywhere. Might as well use that to heat the Solar Wind, <i>a la</i> a Crookes Radiometer Drive...<br /><br />;-)<br />Two Percentnoreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-60769205673267649222018-05-24T22:33:39.512-07:002018-05-24T22:33:39.512-07:00Hey Expat.
Thanks again for a breakdown of complic...Hey Expat.<br />Thanks again for a breakdown of complicated (to me) science.<br /><br />I don't mean to be dumb, just naturally gifted that way, but even if it worked I can't figure out why the EM Drive is such a big deal to everyone...<br /><br />Supposing the drive actually worked, at 50 micronewtons of thrust wouldn't we need 1000 drives just to lift a teaspoon of sugar?<br />Obviously we could build bigger drives, but Am I missing something?<br /><br />Thanks mate.<br /><br /><br />Danielnoreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-8585413735572732632018-05-24T14:48:39.515-07:002018-05-24T14:48:39.515-07:00It's an interesting subject and considerate of...It's an interesting subject and considerate of you to share it with us, Patrick. You can fairly question the value of the research, but when you jump to unsubstantiated conclusions, and refuse to account for yourself, it might seem as if you beg for readers to illustrate how a sluggardly you can be.THE Orbs Whipererhttps://www.blogger.com/profile/08651754060614417385noreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-8896149783999669002018-05-24T12:23:46.835-07:002018-05-24T12:23:46.835-07:00I'm not going to answer any of those questions...I'm not going to answer any of those questions.expathttps://www.blogger.com/profile/10369924104634464934noreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-18131734434556346902018-05-24T11:45:01.673-07:002018-05-24T11:45:01.673-07:00You haven't proven anything, Patrick. NASA is...You haven't proven anything, Patrick. NASA is still working on the challenging enigma. Do you really think that know more than NASA? Are you honestly in denial as to the differences between Mechanical Physics and Quantum Physics? Now, granted, you might have the makings of a reasonable hypothesis. What you need to do in order to be relevant, is to design an theoretical experiment which can test your idea, to see if the results will match your prediction. THE Orbs Whipererhttps://www.blogger.com/profile/08651754060614417385noreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-72496074547835570872018-05-24T07:46:48.958-07:002018-05-24T07:46:48.958-07:00Theadora the whole point is that the results are n...Theadora the whole point is that the results are no longer baffling.expathttps://www.blogger.com/profile/10369924104634464934noreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-46085213631874145932018-05-24T07:09:13.586-07:002018-05-24T07:09:13.586-07:00I'm OK with 20 and 13.52 µN being called "...I'm OK with 20 and 13.52 µN being called "in the same range"—that's no problem. But I don't think we're there yet, for the following reason:<br /><br />The electromagnetic force would be applied to the entire length of the current-carrying cable, and thus to the entire length of the torsion arm. The deflection that produces would be far, far less than the same force applied only at the end of the torsion arm, as would be the case if the EM joke... ahem, drive was actually working as advertised.James Concannonnoreply@blogger.comtag:blogger.com,1999:blog-8051630750074978974.post-42956009542317868072018-05-23T19:26:05.279-07:002018-05-23T19:26:05.279-07:00It seems to me that in light of the uncertainty, t...It seems to me that in light of the uncertainty, the baffling variation in experimental results is similar to the unexpected phenomenon which occurs in the Quantum realm. They might actually be on to something.THE Orbs Whipererhttps://www.blogger.com/profile/08651754060614417385noreply@blogger.com