QUESTION:
What is solar electric propulsion? I've never heard of this method.

ANSWER from Smart Filter on August 8, 1997:
Thank you for your question. You can find good descriptions at:

http://www.afbmd.laafb.af.mil/xrt/xrts/spclft/tnprop8.htm

and more applications at:

http://www.ple.af.mil/facil/page26.html
http://www.ple.af.mil/intro/slr_ill.htm (nice picture)
http://techinfo.jpl.nasa.gov/www/wwwr&t/94r&t/kws039.htm
http://techinfo.jpl.nasa.gov/WWW/ExNPS/OV16.html
http://www.tasmall.com.au/drmatrix/starship/sails.htm#solar

and related information:

http://von-braun.msfc.nasa.gov/Public/Ps01/Ps05/solar_thermal.html
http://www.afbmd.laafb.af.mil/xrt/xrts/spclft/tnprop9.htm
http://www.ec-lille.fr/~u3p/textang/propha.html