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

摘要

It will be noted that the major variables of the wing are taken as the airfoil plan form and section. Airfoil plan-form variations are probably covered sufficiently by the inclusion, in the program, of two plan forms: rectangular and 2:1 taper. The variations in airfoil section are likewise covered by the inclusion of two airfoil sections, a symmetrical N.A.C.A. 0012 representing slightly cambered sections and an N.A.C.A. 4412 representing moderately highly cambered sections. An incidental variation in section thickness is also obtained by considering the thick section at the root of the tapered wing as a variation of the N.A.C.A. 0012. The major variable of the fuselage is the cross-sectional shape, the variation of which is included in the program by means of two fuselage, one having round and the other rectangular sections. The major variable of the combination is the vertical position of the wing with respect to the fuselage. It appears to be necessary to include as many as 21 vertical positions to make the investigation reasonably complete in this respect. The complete program is intended finally to include all possible combinations of major variables and all such combinations of minor variables as may appear to be of particular importance.