Sonoma Wings Hang Gliding Club

sonomawings.com

United States Hang Gliding and Paragliding Association

ushpa.aero

Air Creation

aircreation.com/en

San Francisco Bay Wind Streaklines

met.sjsu.edu/wind/streaklines

Ultralight Trike

wikipedia.org/wiki/Ultralight_trike

FAA – Light-Sport Aircraft

faa.gov/aircraft/gen_av/light_sport/