YF-22A Prototype Advanced Tactical Fighter Demonstration/Validation Flight Test Program Overview
Yes--This is Rocket Science: MMCs for Liquid Rocket Engines
Years to First Rehabilitation of Superpave Hot Mix Asphalt
Year 2000 Conversion at the Atlantic Fleet Weapons Training Facility
X-Wing: A Low Disc-Loading V/STOL for the Navy
X-Ray Curing of Carbon Fiber Composites for Structural Automotive Components
X-36 Tailless Agility Aircraft Subsystems Integration
X-31 Helmet Mounted Visual & Aural Display (HMVAD) System
X-15 Research Vehicle Auxiliary Power System