. . . . . . . . "Investigation of an asymmetric \"penshape\" exit having circular projections and discharging into quiescent air"@en . "Investigation of an asymmetric \"penshape\" exit having circular projections and discharging into quiescent air" . "An symmetric \"penshape\" exit was designed by the method of characteristics for a nozzle pressure of 15. This configuration was experimentally evaluated in quiescent-air tests over a range of pressure ratios from 4 to 16. In an attempt to achieve throat-area modulation, a scheme was also investigated wherein a teardrop-shape ramp moved out of the concave expansion surface to restrict the flow."@en . . . . "An symmetric \"penshape\" exit was designed by the method of characteristics for a nozzle pressure of 15. This configuration was experimentally evaluated in quiescent-air tests over a range of pressure ratios from 4 to 16. In an attempt to achieve throat-area modulation, a scheme was also investigated wherein a teardrop-shape ramp moved out of the concave expansion surface to restrict the flow." . . . . . . . . . . . . . . . . . "Charts, diagrams, etc." . . "Air flow." . . "United States. National Adviosry Committee for Aeronautics." . . "Nozzles Design and construction." . . "Lewis Flight Propulsion Laboratory." . . "Waste gases." . . "United States. National Advisory Committee for Aeronautics." . .