XPost: sci.physics, sci.military.naval   
   From: invalid@invalid.com   
      
   On 5/18/2017 9:19 AM, Robert Clark wrote:   
   > "Fred J. McCall"  wrote in message   
   > news:pe8rhc5io10st9eouc05gs6sqkbj1m8j43@4ax.com...   
   > ==================================================   
   >>   
   >> The U.S. Navy is testing ...   
   >>   
   > That's "has tested", not "is testing".   
   >>   
   >> ... a 30 kilowatt laser ...   
   >>   
   > Like I said, A laser at power levels too low to be deployed.   
   >>   
   >> ... on the USS Ponce that can take out small boats and small drones.   
   >>   
   > Very small boats and drones.   
   >>   
   >> The plan is to install a more powerful 150   
   >> kW laser that can take out larger ships and aircraft:   
   >>   
   > That's at least three years out.  And any ship that gets one will need   
   > at least half a megawatt of spare electrical capacity.  That's quite a   
   > stretch, given that big ships like the ARLEIGH BURKE class only have   
   > 7.5 MW total and there is already concern whether they can power   
   > potential radar upgrades.   
      
      
      
      
   the key problem is that large power lasers heat up the airpath and   
   defocus themselves.   
      
   10kw or more.   
      
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