Potential NASA Commercial Applications: Simultaneous mean and dynamic shear stress measurement will enable NASA ATP facilities to precisely measure wall skin friction, which is currently not possible. Specifically, in the subsonic and the transonic regimes, this sensor will allow NASA ATP to explore skin friction drag reduction technology. This capability provides scientific value and poses significant commercial gain to NASA ATP by means of providing aerodynamic design and testing opportunity to the aviation industry. Furthermore, this technology enables NASA to establish a primary calibration standard for other shear stress measurement techniques, potentially extending this capability to supersonic and hypersonic regimes. Specific NASA ATP facilities that will benefit from precise skin friction instrumentation for aerodynamic performance estimation are: • NASA Glenn Research Center: 9' by 15' low speed wind tunnel • NASA Langley Research Center: 14' by 22' Subsonic Wind Tunnel, 20 Foot Vertical Spin Tunnel, and the 11 ft x 11 ft Transonic Unitary Plan Facility. The silicon micromachining technique inherently minimizes unit cost. Overall, NASA and the aviation industry stand to significantly benefit via better aerodynamic design and higher efficiency/ lower drag at lower cost.