Store Separation Testing Techniques at the Arnold Engineering Development Center

Store Separation Testing Techniques at the Arnold Engineering Development Center
Author: J. B. Carman (Jr.)
Publisher:
Total Pages: 92
Release: 1980
Genre: Airplanes, Military
ISBN:

The purpose of this report is to describe the formulation and basic composition of several store separation techniques (dynamic drop, wind tunnel computer simulation, and analytical computer simulation) along with the benefits and limitations of each. In the course of the report, guidelines are established for use in formulation of future store separation test and evaluation programs. (Author).

Store Separation

Store Separation
Author: Leon H. Schindel
Publisher:
Total Pages: 114
Release: 1975
Genre: Aerodynamics, Supersonic
ISBN:

This AGARDograph is a systematic collection of experimental results for use of engineers and designers, limited to externally carried, unpowered, unguided stores. In the sections dealing with store trajectories, the physical situation is described, the method of solution is indicated, and the final results are presented. Emphasis is on store motion in traversing the parent aircraft flowfield, with criteria for safe separation and methods of calculating flight path. Windtunnel test techniques are described, and some information on flight testing given. Analytical treatment is compared with flight and tunnel results. There are brief mentions of ejection systems and the effect of stores on aircraft performance.

Influences of Sting Support on Aerodynamic Loads Acting on Captive Store Models

Influences of Sting Support on Aerodynamic Loads Acting on Captive Store Models
Author: R. E. Dix
Publisher:
Total Pages: 332
Release: 1976
Genre: Aerodynamic load
ISBN:

In a series of wind tunnel tests, measurements were made of the aerodynamic loads acting on eight different store configurations mounted in the external captive position on a one-twentieth-scale model of the F-4C aircraft. Store models included blunt and contoured afterbody shapes, stable and unstable designs, and large (one per pylon) and small (rack-mounted) configurations. The tests were conducted in an effort to evaluate sting effects on captive store loads. Sting effects were considered to consist of two contributions: the effect of altering the afterbody of a store to allow insertion of a sting, and the effect of the presence of the sting. Altering the afterbody of an unstable store influenced captive loads less than altering a stable configuration. It was also determined that the presence of a sting affected most the pitching and yawing moments.

Store Separation Testing Techniques at the Arnold Engineering Development Center

Store Separation Testing Techniques at the Arnold Engineering Development Center
Author: J. P. Billingsley
Publisher:
Total Pages: 96
Release: 1979
Genre: Airplanes, Military
ISBN:

Tests were conducted on a four-finned, ogive-cylinder store model which was mounted on the von Karman Gas Dynamics Facility (VKF) Captive Trajectory System (CTS) in the Arnold Engineering Development Center (AEDC) Supersonic Wind Tunnel A. The purpose of these tests was to provide information necessary for an independent check on the VKF CTS trajectory mode results. Grid and trajectory data were obtained for the store, both in the free stream and in the interference flow field of a generalized parent-aircraft model. The Mach number was 1.63, with Reynolds numbers per foot of 5.0 and 3.8 million. Grid data from these tests were used in conjunction with the Air Force Flight Dynamics Laboratory (AFFDL) Six-Degree-of-Freedom Computer Program (SDFCP) to simulate the trajectories obtained by the VKF CTS. These SDFCP simulations compared favorably with the CTS trajectories, providing an important compared favorably with the CTS trajectories, providing an important independent verification of the VKF CTS trajectory mode results. This report documents this validation effort and provides a general description of the VKF CTS as well as guidelines for potential users of this system. (Author).

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports
Author:
Publisher:
Total Pages: 990
Release: 1979
Genre: Aeronautics
ISBN:

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Evaluation of the Aerodynamic Interference of the Tunnel 4T Captive Trajectory System on the Separation Characteristics of the BLU-27 Store

Evaluation of the Aerodynamic Interference of the Tunnel 4T Captive Trajectory System on the Separation Characteristics of the BLU-27 Store
Author: Wallace Luchuk
Publisher:
Total Pages: 58
Release: 1976
Genre: Aerodynamic load
ISBN:

This report contains the results of an experimental program to evaluate the effect of the 4T Captive Trajectory System on the separation characteristics of typical stores. The models selected as being generally representative of external stores were the modified BLU-27B/B configuration with and without fins. The aircraft model selected for this test was the F-111. To assess the aerodynamic interference of the Captive Trajectory System on the store and its trajectory, four sting lengths were used to position the store model at varying distances from the support system. Data were obtained at Mach numbers of 0.4, 0.8, 0.9, 1.1, and 1.2. Captive trajectories simulating store separation from the aircraft model were obtained; forces on the store were measured while the store was moved vertically away from the marriage position; and force data on the store were obtained as it was yawed in a location as far removed as possible from the aircraft model. It was concluded that the Captive Trajectory System has little or no effect on the store loads and trajectory development. (Author).