for LOCAL WEATHER: SNOW DEPTH: LOCAL WEATHER RADAR: STATE WEATHER MAP: Essington, PA Essington, PA snow Essington, PA radar PA map-or--or--or- 19029 19029 snow 19029 radar -or--or- PA PA snow
It could reach a top speed of 4,520 miles per hour (7,274 km/h), or Mach 6.72. During the X-15 program, 13 flights by eight pilots met the Air Force spaceflight criterion by exceeding the altitude of 50 miles (80 km), thus qualifying these pilots as being astronauts.
Fastest plane in the world. NASA's X-43 is the fastest aircraft in the world. On 16 November 2004, the X-43 reached Mach 9.6 (7,000 mph or 11,265 km/h) according to NASA. The X-43 is an unmanned aircraft, which launches not from the ground but from a B-52 at about 40,000 feet (12.2 kilometers) in the air.