Za-3 Air Cushion Vehicle Test Program
XV-9a Hot Cycle Research Aircraft Program
Xenon Ion Propulsion for Orbit Transfer
X-57 Power and Command System Design
X-43D Conceptual Design and Feasibility Study
X-37 Storable Propulsion System Design and Operations
X-15 Hardware Design Challenges
WSTF Propulsion and Pyrotechnics Corrective Action Test Program Status-2000
Workshop on Solar Electric Propulsion
Winter 1981 Trafficability Tests of the USCGC POLAR SEA. Volume 5. Bollard and Tow-Rope Pull Tests
Wind-tunnel Tests of Four Curtiss Propellers Embodying Different Blade Sections
Wind Tunnel Investigation of an Oblique Wing Transport Model at Mach Numbers Between 0.6 and 1.4