Investigation of Factors Affecting the Wind Tunnel Measurements of Carriage-Position Airloads on External Store Models at Transonic Mach Numbers
Abstract
A wind tunnel test was conducted to investigate the factors affecting the M-117 and BLU-1C/B (finned and unfinned) store carriage-position airloads beneath the wing of a 0.05-scale A-7D aircraft. The investigation included: store afterbody modifications, the presence of stings of various diameters and shapes, misalignment of store relative to its carriage position, variations of aircraft yaw attitude, and various store carriage positions on the multiple ejector rack (MER). The rigid loads technique, which simulated the captive trajectory system (CTS) technique, was used to measure carriage-position airloads and the results compared to the CTS results. The test was conducted at Mach number 0.7, 0.9, and 1.05 with the aircraft angle of attack ranging from -2 to 12 deg. The results indicated that the M-117 carriage-position airloads were the most sensitive to any of the factors and the unfinned BLU-1C/B the least sensitive to all the factors investigated. The carriage-position airloads were most sensitive to store afterbody modifications. Most of the effects were greater at Mach number 1.05.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1975
- Accession Number
- ADB002165
Entities
People
- David W. Hill Jr.
Organizations
- Arnold Engineering Development Complex