Interference of Wing and Fuselage From Tests of 209 Combinations in the N. A. C. A. Variable-Density Tunnel

Tests of 209 simple wing fuselage combinations were made in the N. A. C. A. variable-density wind tunnel to provide information regarding the effects of aerodynamic interference between wings and fuselages at a large value of the Reynolds Number. This investigation is part of a basic investigation of aerodynamic interference now in progress at the Committee's laboratory and considers the interference as affected by the more important variables of a combined wing and fuselage.

Most of the tests were made with a round fuselage in combination with a rectangular wing of symmetrical section. Variations of the vertical position, longitudinal position, and angular position were covered. A sufficient number of tests of other variables, such as the wing and fuselage shape, were made to give a general understanding of the effects of these variables. For some of the combinations in which the wing and fuselage were not connected, the air forces on the wing and fuselage were determined separately in order to investigate the mutual interference.

The principal results are given in tabular form and summarized by presenting the important characteristics for all the combinations by means of parameters in a single table so that the relative merits of the various combinations may be readily compared. The results are discussed in relation to the character, cause, and significance of the interference effects encountered under various conditions.