Effect of Compressibility on Section Characteristics of an Airfoil with a Round-Nose Slotted Frise Aileron
Abstract
Compressibilit:y effects on the aerodynanic section characteristics of an airfoil with a round-nose slotted Frise aileron were investigated from pressure distributions obtained at various airfoil angles of attack and aileron angles for mach numbers from 0.25 to approximately 0.76. The aileron tested represented a modification of a sharpnose Frise aileron previously investigated by the NACA. The modification included an increased nose radius as well as an increased balance chord. Modifying the nose of the aileron improved the section aileron effectiveness (Delta alpha)/(Delta delta sub a) at large negative aileron deflections and slightly reduced the effectiveness at moderate aileron deflections. The wind-tunnel data indicated a reduction in stick force and an improvement in stick-force characteristics at high diving speeds; however, the tendency of the up-going aileron toward excessive overbalance at these high speeds still existed. Section aileron loads were essentially unchanged by modifying the aileron nose.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1946
- Accession Number
- ADB184538
Entities
People
- Arvo A. Luoma
Organizations
- National Advisory Committee for Aeronautics