Description

Donald C. Fraser adjusts an apparatus to regulate the amplitude of motion of an electromagnetic shaker.

Original caption: "John E. Gibbons, 1962, is shown with his wind tunnel (left), and Donald C. Fraser, 1962, with apparatus he devised to keep the amplitude of motion of an electromagnetic shaker constant as the frequency varies. Both are students in the aeronautical engineering laboratory described in an article on page 19."

Used in: Technology Review March, 1962, cover.