9 research outputs found
Subsonic sphere drag measurements at intermediate Reynolds numbers
Wind tunnel drag measurements on subsonic spher
Experimental evaluation of a subsonic expansion tube
Subsonic expansion tube evaluation as device for studying particle drag in subsonic compressible slip flo
Low-speed aerodynamic characteristics of a 13.1-percent-thick, high-lift airfoil
Low speed sectional characteristics of a high lift airfoil are studied and a comparison is made of those characteristics with the predictions of the theoretical methods used in the airfoil's design. The 13.1 percent-thick, UI-1720 airfoil was found to achieve the predicted maximum lift coefficient of nearly 2.0. No upper-surface, flow separation was found below the stall angle of attack of 16 degrees; it appeared that stall was due to an abrupt leading edge flow separation
Propeller study. Part 3: Experimental determination of thrust and torque on the YO-3A aircraft
Instrumentation and procedures for obtaining in-flight measurements of the torque and thrust of a propeller mounted on a YO-3A aircraft are described. Problems encountered in the study are discussed and methods for eliminating these difficulties are suggested