Wind-tunnel investigation of longitudinal aerodynamic characteristics of a powered four-duct-propeller VTOL model in transition /
Kenneth P. Spreemann.

APA Citation

Spreemann, K. P., United States. National Aeronautics and Space Administration., Langley Research Center. (1966). Wind-tunnel investigation of longitudinal aerodynamic characteristics of a powered four-duct-propeller VTOL model in transition. Washington, D.C.: National Aeronautics and Space Administration .

MLA Citation

Spreemann, Kenneth P, United States. National Aeronautics and Space Administration, and Langley Research Center. Wind-tunnel Investigation of Longitudinal Aerodynamic Characteristics of a Powered Four-duct-propeller VTOL Model In Transition. Washington, D.C.: National Aeronautics and Space Administration , 1966.