AEROPROPULSIVE CHARACTERISTICS OF TWIN NONAXISYMMETRIC VECTORING NOZZLES INSTALLED WITH FORWARD-SWEPT AND AFT-SWEPT WINGS.

An investigation was conducted in the Langley 16-Foot Transonic Tunnel to determine the aeropropulsive characteristics of a single expansion ramp nozzle (SERN) and a two-dimensional convergent-divergent nozzle (2-D-C-D) installed with both an aft-swept and a forward-swept wing. The SERN was tested in both an upright and an inverted position (external ramp on top and bottom, respectively). The effects of thrust vectoring at nozzle vector angles from -5 degree to 20 degree were studied. This investigation was conducted at Mach numbers from 0. 40 to 1. 20 and angles of attack from -2. 0 degree to 16 degree . Nozzle pressure ratio was varied from 1. 0 (jet off) of about 9. 0. Reynolds number based on the wing mean geometric chord varied from about 3. 0 multiplied by 10**6 to 4. 8 multiplied by 10**6, depending upon free-stream Mach number.