A Flight Test Evaluation and Analytical Study of the Ball-Bartoe Jetwing Propulsive Lift Concept without Ejector

This report covers the results of a two part research effort on the Ball-Bartoe Jetwing propulsive lift concept. This effort was conducted by the University of Tennessee Space Institute, Tullahoma, Tennessee for the Advanced Aircraft Development and Systems Objectives Office (AIR-03PA) of Naval Air Systems Command under contract Number N00019-81-C-0506. The first part of the effort, which is covered in Part I of this report, was a follow on to a previous effort conducted under Naval Air Systems Command Contract Number N00019-80-C- 1026 and reported in UTSI Report 81-1(1). The effort reported herein consisted of a performance flight test with the upper wing (ejector wing) removed, and flyover noise measurements with and without the upper wing. Performance, Stability and Control flight test with the upper wing installed were a part of the previous effort. The second part of the effort consisted of an analytical study to develop a method, or methods, to predict the aerodynamic coefficients of a Jetwing configured aircraft. These coefficients would be of sufficient accuracy for use in preliminary design studies, The results of this analytical effort are reported in Part II of this report. Results of both the flight test and analytical effort are compared to full scale test results of the research aircraft in the NASA Ames Research Center 40' x 80' wind tunnel with the aim of evaluating the Jetwing concept for applications to future flight vehicles.