China's first flight test of its new high-tech J-20 stealth military jet on 11 January has drawn a lot of attention, particularly because it came during the visit of US defence secretary Robert Gates. What it means is another question, and the answers are complex.

Military analysts had known China was developing a combat plane in the class of the US F-22 Raptor stealth fighter, but they had not expected it to make its first appearance in December, Aviation Week and Space Technology reported. Several high-speed ground tests, in which the craft's front wheel rose off the ground, preceded the first flight.

China has released videos of the new jet on the ground, taking off, and landing at Chengdu. The New York Times quoted a Hong Kong analyst as saying the plane flew for 15 minutes over the airfield. With two distinctive angled tail fins like those of the F-22, it's clearly intended to be stealthy. The Times also reports it is intended carry missiles and fly long distances when refuelled in the air.

The demonstration worries some analysts because it's the first aircraft to challenge the performance of the F-22, the top of the US air force's fleet. "We have become accustomed to a world where our air power is dominant," Rand Corporation analyst Roger Cliff told Newsweek.

"But that dominance is now in question." Once the J-20 is deployed, in that scenario, US top guns would lose their high-performance stealth advantage and no longer rule the skies.

It's a safe bet the US has deep black aircraft flying out at Nellis AFB that make the F-22 and J-20 look like antiques. To read the rest of the article, click here.