I Like Radio-Controlled Soaring.
A radio-controlled sailplane is quiet, clean and beautiful.

If you are interested in R/C Soaring and you live in or plan to visit the western suburbs of Philadelphia then check out the link to Soaring At Valley Forge below.
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Soaring At Valley Forge
Name: Jeb Bushell
Email: jebbushellATyahoo.com
Liftroll Planform Design Cookbook
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