Test technique development in interference free testing, flow visualization, and remote control model technology at Langley's Unitary Plan wind tunnelA metric half-span model is considered as a means of mechanical support for a wind-tunnel model which allows measurement of aerodynamic forces and moments without support interference or model distortion. This technique can be applied to interference-free propulsion models. The vapor screen method of flow visualization at supersonic Mach numbers is discussed. The use of smoke instead of water vapor as a medium to produce the screen is outlined. Vapor screen data are being used in the development of analytical vortex tracking programs. Test results for a remote control model system are evaluated. Detailed control effectiveness and cross-coupling data were obtained with a single run. For the afterbody tail configuration, tested control boundaries at several roll orientations were established utilizing the facility's on-line capability to 'fly' the model in the wind tunnel.
Document ID
19790067080
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Corlett, W. A. (NASA Langley Research Center Hampton, Va., United States)