XPost: sci.physics, sci.space.policy, sci.electronics.design   
      
   In sci.physics krw  wrote:   
   > On Wed, 2 Nov 2016 00:00:54 -0000, jimp@specsol.spam.sux.com wrote:   
   >   
   >>In sci.physics John Larkin  wrote:   
   >>> On Tue, 1 Nov 2016 18:19:02 -0000, jimp@specsol.spam.sux.com wrote:   
   >>   
   >>   
   >>   
   >>>>BTW, the lack of commercial success for flying cars has nothing to do   
   >>>>with propulsion methods.   
   >>>>   
   >>>   
   >>> But propulsion does matter, in the sense that there is no affordable   
   >>> way to make a flying car. Helicopters get terrible gas mileage.   
   >>   
   >>You do know helicopters spend a fair amount of time not traveling, don't   
   >>you, but that has nothing to do with flying cars.   
   >   
   > Cars spend a fair amount of time not driving, too.  So?   
      
   Not at close to full output power.   
      
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