CAMPUS AND AREA
University Daily Kansan, January 25, 1985 Page 6
John Lechliter/KANSAN
John Sprague, Salina junior, left, and Phillip Bahorich, Leawood senior, adjust the angle of an experimental wing model. The engineering students, who worked on the model yesterday, plan to test the wing in the wind tunnel at Learned Hall.
Student pioneers safety test
By GREG LARSON Staff Reporter
Now, the engineering doctoral candidate has developed a new test technique at the wind tunnel in Learned Hall designed to reduce the number of landing crashes due to pilot error.
Five years ago, Ray Chang was a major in the Air Force of Taiwan.
Chang spent four years in the Air Force of Taiwan before coming to the United States in 1980 for more advanced aerospace training. He came to the University of Kansas in 1981.
Staff Reporter
Chang said yesterday that his doctoral project experiment was unique. No one has ever tested dynamic, or moving, airplane models in a wind tunnel, he said. Only static, or constant height, tests have been done in wind tunnels, Chang said.
He said he was simulating the high-speed descent of planes and testing the effects of increased air currents close to the ground.
The effect of air on the plane close to the ground is called ground effect. Chang said ground effect could best be characterized by water coming from a hose. Water coming from a hose can cause uniform splash. This can be measured like the uniform wind patterns in a static test.
Water released close to the ground produces irregular splashes. Irregular wind currents produced by the surface water can cause the descent of the plane are like these.
splashes. They cannot be measured because of their irregular currents and eddies, he said.
Chang said that if he could calculate the ground effect in the dynamic experiment, the information could be fed into a computer on a plane that could compensate for pilot's error.
The complexity and modifications of the experiment require that 11 graduate students and six undergraduates assist Chang.
John Sprague, Salina junior, said,
"Everything around here is used,
borrowed, broken or bent. One
helluva an exercise in changing what
is into what it ought to be... that's
engineering."
When Chang finishes his experiment in Japan he returns to the Tokyo Force of Taiwan.
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