Leonardo da Vinci

http://exn.ca/FlightDeck/News/story.cfm?ID=19970810-01

http://www.mos.org/sln/Leonardo/VisionsoftheFuture.html

http://dsc.discovery.com/news/briefs/20031201/leonardo.html

http://wings.avkids.com/Book/Vehicles/intermediate/parachutes-01.html

http://www.uh.edu/engines/epi85.htm

Torricelli

http://www.malaspina.com/site/person_1136.asp

http://scienceworld.wolfram.com/biography/Torricelli.html

http://es.rice.edu/ES/humsoc/Galileo/Catalog/Files/toriceli.html

Mayor of Magdeburg

http://www.uni-magdeburg.de/magdeburg/guericke_eng.html

http://www.acmi.net.au/AIC/VON_GUERICKE_BIO.html

http://physics.kenyon.edu/EarlyApparatus/Pneumatics/Magdeburg_Hemispheres/Magdeburg_Hemispheres.html

Montgolfier

http://www.sciencemuseum.org.uk/on-line/flight/flight/mont.asp

http://www.newadvent.org/cathen/10541a.htm

http://www.centennialofflight.gov/essay/Dictionary/Montgolfier/DI35.htm

Sir George Cayley

http://www.flyingmachines.org/cayl.html

http://www.ctie.monash.edu.au/hargrave/cayley.html

http://www.allstar.fiu.edu/aero/cayley.htm

http://www.centennialofflight.gov/essay/Prehistory/Cayley/PH2.htm

Wright Brothers

http://www.wam.umd.edu/~stwright/WrBr/Wrights.html

http://www.first-to-fly.com/History/Wright%20Story/wright%20story.htm

Louis Bleriot

http://www.port-of-dover.com/history/bleriot/bleriot.htm

http://www.fiddlersgreen.net/aircraft/WWI/bleriot/bler_info/bler_info.htm

http://www.centennialofflight.gov/essay/Dictionary/Bleriot/DI11.htm

http://bleriot.com/

Charles Lindberg

http://www.pbs.org/kcet/chasingthesun/innovators/clindbergh.html

http://www.acepilots.com/lindbergh.html

http://www.fiddlersgreen.net/aircraft/private/spirit/spirit_info/spirit_inf.htm

http://www.pbs.org/wgbh/amex/lindbergh/sfeature/spirit.html