The XV-15 Tilt Rotor technology demonstrator was the culmination of efforts begun in the early 1950s to produce an aircraft that could takeoff, land, and hover like a helicopter, but with the speed of ...
Enjoy views of the Moon, along with other night sky objects, at the Udvar-Hazy Center, weather permitting. Astronomy Program Observe the Sun DC Metro Area Fridays and Saturdays from 12:00 pm to 3:00 ...