Accession Number:

ADA021435

Title:

Development of Prediction Techniques for Aerodynamic Loads Acting on External Stores

Descriptive Note:

Final technical rept.

Corporate Author:

GENERAL DYNAMICS SAN DIEGO CA CONVAIR AEROSPACE DIV

Personal Author(s):

• Sullivan, Maurice B.

Report Date:

1975-11-01

Pagination or Media Count:

332.0

Abstract:

A preliminary design technique for the prediction of aerodynamic loads acting on external stores has been established through an empirical correlation of wind tunnel results obtained on a scale model of the F-111. Approximately 30,000 engineering data points were surveyed for various combinations of external stores. These data, originally stored on magnetic tape, were transferred to CDC 6600 disk packs. This was done to reduce the amount of computer run time required to collect the desired samples of data. For this study, correlations were performed of each aerodynamic component of load or moment acting on a particular store grouping as a function of various geometry parameters. The work was accomplished primarily through the utilization of numerical programs in which, through a series of trial and error calculations, an equation composed of various key geometry parameters was generated. The equations obtained for the numerical programs predict normal force, side force, pitching moment, yawing moment, and rolling moment for various external store arrangements.

Descriptors:

• *AERODYNAMIC LOADING
• *ATTACK AIRCRAFT
• *EXTERNAL STORES
• BOMB EJECTORS
• AERODYNAMIC FORCES
• REGRESSION ANALYSIS
• MOMENTS
• PITCH(MOTION)

Subject Categories:

• Aerodynamics
• Attack and Fighter Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE