Accession Number : ADA954079

Title :   Description and Calibration of a Wall Balance System for a 15 by 20-inch Subsonic Wind Tunnel.

Descriptive Note : Technical note,

Corporate Author : DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT

Personal Author(s) : Ottensoser,J.

Report Date : FEB 1971

Pagination or Media Count : 26

Abstract : A three-component strain gage type wall balance for a 15 by 20-inch Subsonic Wind Tunnel has been built and calibrated. The balance construction was based on a Honeywell Corporation design and is considered proprietary information. This system uses a set of three concentric rings on each side of the two walls of the tunnel test section to measure lift, drag and pitching moment. Maximum loads are + or - 300 pounds in lift and + or - 50 pounds in drag. Calibration results indicate the balance is reliable to within 1 percent in lift and drag, but moment results are only fair and at best the accuracy is only within 5 percent. Additional keywords include: U/A Reports, Dynamic pressure, Two dimensional tunnels.

Descriptors :   *BALANCES, *SUBSONIC WIND TUNNELS, STRAIN GAGES, MEASURING INSTRUMENTS, MOMENTS, PITCH(MOTION), DRAG, LIFT, RINGS, TWO DIMENSIONAL, WALLS

Subject Categories : Printing and Graphic Arts

Distribution Statement : APPROVED FOR PUBLIC RELEASE