Re: 2007 NASA Beam Power Challenge, $1M prize (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>

This topic is starting to stray into the nether world of cool but not
tesla coils.  TCs have been used to transmit energy and that's a perfectly
acceptable topic.  My thinking when approving the first message was that
it gives a chance and motivation to people who want to develop a TC based
energy transmitter.

Chip

---------- Forwarded message ----------
Date: Sat, 19 May 2007 00:05:42 -0400 (EDT)
From: M G <gt4awd@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 2007 NASA Beam Power Challenge, $1M prize (fwd)

p {margin-top:0px;margin-bottom:0px;}
I feel like I should not get involved in this topic due to my lack of
information/understanding, but what is the method used to "beam" energy?
I would see it that a very powerful laser beam would be the most
efficient way of doing this. Then again, isn't this how is it already
being attempted?


      ---------[ Received Mail Content ]----------

      Subject : Re: 2007 NASA Beam Power Challenge, $1M prize (fwd)

      Date : Fri, 18 May 2007 18:48:06 -0600 (MDT)

      From : "Tesla list" <tesla@xxxxxxxxxx>

      To : tesla@xxxxxxxxxx



      Original poster: List moderator







      ---------- Forwarded me! ssage ----------

      Date: Fri, 18 May 2007 11:52:39 -0700 (PDT)

      From: Ben McMillen

      To: Tesla list

      Subject: Re: 2007 NASA Beam Power Challenge, $1M prize (fwd)



      I believe that even 13% is even optimistic.. That was the
      latest I've heard of in the past year..



      Coiling In Pittsburgh

      Ben McMillen



      Tesla list wrote: Original poster: List moderator







      ---------- Forwarded message ----------

      Date: Fri, 18 May 2007 10:47:34 -0700

      From: Ed Phillips

      To: Tesla list

      Subject: Re: 2007 NASA Beam Power Challenge, $1M prize (fwd)



      Note that the article just talks about the 2005 and 2006
      challenges.



      http://www.elevator2010.org/ has the latest rules, etc.



      The purse is $500K for the beam power aspect.

      Payload must be 10-25 kg

      climb 50m at a sp! eed no less than 2m/sec

      (that's 25 seconds)



      mgh = 10*9.8*50 = about 5000 Joules

      25 seconds means Pavg of 200W



      Just to ballpark something simple like solar cells.. assume
      you get

      25% overall efficiency from light to motor. You'll need about
      a

      square meter of solar cells."



      To me solar cells don't fit the category of "wireless power"
      referred to here. The 25% overall efficiency from light to
      motor (should be to effective thrust of lift/propulsion
      system) seems mighty might optimistic...............



      Ed















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