Zit ER Vaart in Voortstuwing (What Is the Progress in Propulsion)
ZEST Flight Test Experiments, Kauai Test Facility, Hawaii
Zero Footprint Camp: Waste Is a Resource
Zero-Emission Strayton Powered Off-Road Machinery
YAH-63 Helicopter Crashworthiness Simulation and Analysis
X-Ray Astronomy at Marshall Space Flight Center: Chandra, IXPE, Lynx
X-33 Attitude Control System Design for Ascent, Transition, and Entry Flight Regimes
Working Media for Electrofluid Dynamic Generators
Wind tunnel evaluation of a truncated NACA 64-621 airfoil for wind turbine applications