References

Simon Field, Aerodynamics. N.p., 2004. Web. 23 Jan 2012. <http://sci-toys.com/scitoys/scitoys/aero/aero.html>.

. N.p., 2010. Web. 23 Jan 2012. http://games-and-consoles.blurtit.com/q6706675.html.

. N.p., 1999. Web. 23 Jan 2012. <http://www.ehow.com/how_2352236_build-toy-helicopter.html>.