Youtor
John Vassberg Boomerang Flight Dynamics
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=T7LAnT2r_vo
Aerodynamic characteristics and flight dynamics of boomerangs are investigated. A basic aerodynamic model, developed in the 1960’s, is expanded upon using Blade Element Theory. • The new aerodynamic model is coupled with a gyroscope model for rudimentary analyses. Some significant findings are made regarding the radius of a boomerang’s circular flight path, the required inclination angle of its axis-of-rotation, its trim state, as well as its dynamic stability. These discoveries provide a basic understanding of how the interplay between aero-dynamic forces and moments, and gyroscopic precession combine to return the boomerang to its rightful owner by way of a circular flight path. • Dr. Vassberg is the Lead Aerodynamicist and Engineer of the BCA Design Center in Southern California. Prior to this, he was Chief Aerodynamicist of Boeing’s Research Technology organization. • Dr. Vassberg holds over a dozen Patents related to aerodynamic technologies, and has authored over 100 publications. In addition, Dr. Vassberg has introduced and developed new fields of numerical simulation including: in-flight refueling hose-drogue dynamics, towed-decoy dynamics, fast surface-paneling techniques, and globally-elliptic meshing methods. • Dr. Vassberg received his PhD from the University of Southern California in 1992, and his MS and BS from Texas A M University in 1981 and 1980, respectively, all in Aerospace Engineering. • Sponsored by the Aerospace Engineering Department • http://www.engin.umich.edu/aero/
#############################
