资讯

We've seen helicopters hover both in movies and in real life rescues. The Guinness World Record for the longest hover, set in 1989, is 50 hours.
The size and weight of the helicopter, its fuel level, and the current weather conditions will all influence how long it can safely hover for at any given moment, but the current record hover was ...
For nearly four decades, the AV-8B Harrier II was the only short takeoff, vertical landing (V/STOL) jet aircraft in the U.S. military's inventory. What that means is that this unique aircraft can ...
The Harrier Jump Jet made its first flight on this day in history, August 31, 1966. The warplane is known for its ability to take off vertically and hover like a helicopter.