ONE COMPONENT, MAGNETIC, SUPPORT AND BALANCE SYSTEM FOR WIND TUNNEL MODELS

摘要

A one-component, magnetic, support-and-balance system was developed to aid in the study of sphere drag at subsonic Mach numbers and Reynolds numbers from about 25 to 4000. This system was used with a vertical wind tunnel and incorporated a simple error-rate type of feed-back control system to hold the model vertically. The natural radial sta-bility of the system was used to hold the model on or near the axes of the solenoids and the wind tunnel. The system performed well, especially at Reynolds numbers where unsteady lateral aerodynamic forces were absent or very small.