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   sci.space.policy      Discussions about space policy      106,651 messages   

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   Message 105,832 of 106,651   
   Doctor Who to Otto J. Makela   
   Re: First reply PNN attempt   
   15 Aug 22 17:46:04   
   
   From: doc@tardis.org   
      
   On Mon, 15 Aug 2022 17:43:40 +0300, om@iki.fi (Otto J. Makela) wrote:   
      
   >Doctor Who  wrote:   
   >   
   >> On Fri, 12 Aug 2022 16:27:42 +0300, om@iki.fi (Otto J. Makela) wrote:   
   >>>Doctor Who  wrote:   
   >>>> wrong again,   
   >>>> no thermal effect can grow thrust in time at parity of power.   
   >>>   
   >>>You already said that, but unfortunately I don't quite understand what   
   >>>you mean by that. The issue probably stems from the fact that neither of   
   >>>us is a native English speaker. Can you please try to expand on this?   
   >>   
   >> acceleration increases in time with the same power output.   
   >   
   >This is exactly what one would expect of a thermal effect: the "thrust"   
   >increases as the device gets warmer, and then once power is switched off   
   >starts slowly falling as the device cools down.   
   >   
   >What I would expect of a non-thermal thrust effect is that it starts   
   >(at least nearly) immediately as power is applied and also dies down   
   >almost immediately when power is switched off.   
   >   
   >If this is a thermal effect, at some device temperature there should   
   >come a saturation of "thrust" produced, but this point may be beyond   
   >what you can safely test without damaging your electronics.   
   >   
   >One test that might yield us some interesting data points is to plot how   
   >well the device temperature correlates with the "thrust" produced.   
   >Contactless infrared thermometers exist.   
      
   do the experiment!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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