From: vince@offshore.ai (Vincent Cate)
Newsgroups: sci.space.policy,sci.physics,sci.astro,alt.planets.venus,sci.skeptic
Subject: Re: Lunar/Moon Space Elevator, plus another ISS within the CM
References: <5d28ff28.0308180816.1340ef3f@posting.google.com> <bnbop5$4uk$1@pcls4.std.com> <HnAAqv.MGp@spsystems.net> <9186edb5.0310271958.2e13ea4d@posting.google.com> <HnH8MH.50o@spsystems.net>
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henry@spsystems.net (Henry Spencer) wrote in message news:<HnH8MH.50o@spsystems.net>...
> "Space Transfer With Ground-Based Laser/Electric Propulsion," paper
> AIAA-92-3213, presented at the AIAA/SAE/ASME/ASEE 28th Joint Propulsion
> Conference, July 6-8 1992, Nashville, TN. Also available as NASA
> Technical Memorandum TM-106060:
> http://powerweb.grc.nasa.gov/pvsee/publications/lasers/AIAA92_3213.html

Thanks.

He has: 
  Laser OTV, Photovoltaic array: 0.7 kg/kWe

This is 1,429 watts/kg.  I think this compares to 100 to 140 watts/kg
for sun powered photovoltaic arrays.  So it is 10 to 14 times better.

   -- Vince